From adf094931ffb25ef4b381559918f1a34181a5273 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 6 Oct 2008 22:46:05 +0200 Subject: PM: Simplify the new suspend/hibernation framework for devices PM: Simplify the new suspend/hibernation framework for devices Following the discussion at the Kernel Summit, simplify the new device PM framework by merging 'struct pm_ops' and 'struct pm_ext_ops' and removing pointers to 'struct pm_ext_ops' from 'struct platform_driver' and 'struct pci_driver'. After this change, the suspend/hibernation callbacks will only reside in 'struct device_driver' as well as at the bus type/ device class/device type level. Accordingly, PCI and platform device drivers are now expected to put their suspend/hibernation callbacks into the 'struct device_driver' embedded in 'struct pci_driver' or 'struct platform_driver', respectively. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Cc: Jesse Barnes Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci-driver.c | 46 ++++++++++++++++++---------------------------- 1 file changed, 18 insertions(+), 28 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index b4cdd690ae7..4042d211c3e 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -433,8 +433,7 @@ static int pci_pm_suspend(struct device *dev) static int pci_pm_suspend_noirq(struct device *dev) { - struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { @@ -469,11 +468,10 @@ static int pci_pm_resume(struct device *dev) static int pci_pm_resume_noirq(struct device *dev) { - struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume_early, pci_dev); + pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); if (drv && drv->pm) { if (drv->pm->resume_noirq) @@ -519,8 +517,7 @@ static int pci_pm_freeze(struct device *dev) static int pci_pm_freeze_noirq(struct device *dev) { - struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { @@ -553,15 +550,14 @@ static int pci_pm_thaw(struct device *dev) static int pci_pm_thaw_noirq(struct device *dev) { - struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { if (drv->pm->thaw_noirq) error = drv->pm->thaw_noirq(dev); } else { - pci_fixup_device(pci_fixup_resume_early, pci_dev); + pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); error = pci_legacy_resume_early(dev); } @@ -589,8 +585,7 @@ static int pci_pm_poweroff(struct device *dev) static int pci_pm_poweroff_noirq(struct device *dev) { - struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { @@ -625,7 +620,7 @@ static int pci_pm_restore(struct device *dev) static int pci_pm_restore_noirq(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); - struct pci_driver *drv = pci_dev->driver; + struct device_driver *drv = dev->driver; int error = 0; pci_fixup_device(pci_fixup_resume, pci_dev); @@ -654,17 +649,15 @@ static int pci_pm_restore_noirq(struct device *dev) #endif /* !CONFIG_HIBERNATION */ -struct pm_ext_ops pci_pm_ops = { - .base = { - .prepare = pci_pm_prepare, - .complete = pci_pm_complete, - .suspend = pci_pm_suspend, - .resume = pci_pm_resume, - .freeze = pci_pm_freeze, - .thaw = pci_pm_thaw, - .poweroff = pci_pm_poweroff, - .restore = pci_pm_restore, - }, +struct dev_pm_ops pci_dev_pm_ops = { + .prepare = pci_pm_prepare, + .complete = pci_pm_complete, + .suspend = pci_pm_suspend, + .resume = pci_pm_resume, + .freeze = pci_pm_freeze, + .thaw = pci_pm_thaw, + .poweroff = pci_pm_poweroff, + .restore = pci_pm_restore, .suspend_noirq = pci_pm_suspend_noirq, .resume_noirq = pci_pm_resume_noirq, .freeze_noirq = pci_pm_freeze_noirq, @@ -673,7 +666,7 @@ struct pm_ext_ops pci_pm_ops = { .restore_noirq = pci_pm_restore_noirq, }; -#define PCI_PM_OPS_PTR &pci_pm_ops +#define PCI_PM_OPS_PTR (&pci_dev_pm_ops) #else /* !CONFIG_PM_SLEEP */ @@ -703,9 +696,6 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner, drv->driver.owner = owner; drv->driver.mod_name = mod_name; - if (drv->pm) - drv->driver.pm = &drv->pm->base; - spin_lock_init(&drv->dynids.lock); INIT_LIST_HEAD(&drv->dynids.list); -- cgit v1.2.3-70-g09d2 From 355a72d75b3b4f4877db4c9070c798238028ecb5 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 8 Dec 2008 00:34:57 +0100 Subject: PCI: Rework default handling of suspend and resume Rework the handling of suspend and resume of PCI devices which have no drivers or the drivers of which do not provide any suspend-resume callbacks in such a way that their standard PCI configuration registers will be saved and restored with interrupts disabled. This should prevent such devices, including PCI bridges, from being resumed too late to be able to function correctly during the resume of the other PCI devices that may depend on them. Also, to remove one possible source of future confusion, drop the default handling of suspend and resume for PCI devices with drivers providing the 'pm' object introduced by the new suspend-resume framework (there are no such PCI drivers at the moment). This patch addresses the regression from 2.6.26 tracked as http://bugzilla.kernel.org/show_bug.cgi?id=12121 . Signed-off-by: Rafael J. Wysocki Cc: Jesse Barnes Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci-driver.c | 94 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 63 insertions(+), 31 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 4042d211c3e..99d867bcf22 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -300,6 +300,14 @@ static void pci_device_shutdown(struct device *dev) #ifdef CONFIG_PM_SLEEP +static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) +{ + struct pci_driver *drv = pci_dev->driver; + + return drv && (drv->suspend || drv->suspend_late || drv->resume + || drv->resume_early); +} + /* * Default "suspend" method for devices that have no driver provided suspend, * or not even a driver at all. @@ -317,14 +325,22 @@ static void pci_default_pm_suspend(struct pci_dev *pci_dev) /* * Default "resume" method for devices that have no driver provided resume, - * or not even a driver at all. + * or not even a driver at all (first part). */ -static int pci_default_pm_resume(struct pci_dev *pci_dev) +static void pci_default_pm_resume_early(struct pci_dev *pci_dev) { - int retval = 0; - /* restore the PCI config space */ pci_restore_state(pci_dev); +} + +/* + * Default "resume" method for devices that have no driver provided resume, + * or not even a driver at all (second part). + */ +static int pci_default_pm_resume_late(struct pci_dev *pci_dev) +{ + int retval; + /* if the device was enabled before suspend, reenable */ retval = pci_reenable_device(pci_dev); /* @@ -371,10 +387,12 @@ static int pci_legacy_resume(struct device *dev) struct pci_dev * pci_dev = to_pci_dev(dev); struct pci_driver * drv = pci_dev->driver; - if (drv && drv->resume) + if (drv && drv->resume) { error = drv->resume(pci_dev); - else - error = pci_default_pm_resume(pci_dev); + } else { + pci_default_pm_resume_early(pci_dev); + error = pci_default_pm_resume_late(pci_dev); + } return error; } @@ -420,10 +438,8 @@ static int pci_pm_suspend(struct device *dev) if (drv->pm->suspend) { error = drv->pm->suspend(dev); suspend_report_result(drv->pm->suspend, error); - } else { - pci_default_pm_suspend(pci_dev); } - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_SUSPEND); } pci_fixup_device(pci_fixup_suspend, pci_dev); @@ -433,6 +449,7 @@ static int pci_pm_suspend(struct device *dev) static int pci_pm_suspend_noirq(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; @@ -441,8 +458,10 @@ static int pci_pm_suspend_noirq(struct device *dev) error = drv->pm->suspend_noirq(dev); suspend_report_result(drv->pm->suspend_noirq, error); } - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); + } else { + pci_default_pm_suspend(pci_dev); } return error; @@ -452,15 +471,17 @@ static int pci_pm_resume(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; - int error; + int error = 0; pci_fixup_device(pci_fixup_resume, pci_dev); if (drv && drv->pm) { - error = drv->pm->resume ? drv->pm->resume(dev) : - pci_default_pm_resume(pci_dev); - } else { + if (drv->pm->resume) + error = drv->pm->resume(dev); + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume(dev); + } else { + error = pci_default_pm_resume_late(pci_dev); } return error; @@ -468,6 +489,7 @@ static int pci_pm_resume(struct device *dev) static int pci_pm_resume_noirq(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; @@ -476,8 +498,10 @@ static int pci_pm_resume_noirq(struct device *dev) if (drv && drv->pm) { if (drv->pm->resume_noirq) error = drv->pm->resume_noirq(dev); - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume_early(dev); + } else { + pci_default_pm_resume_early(pci_dev); } return error; @@ -504,10 +528,8 @@ static int pci_pm_freeze(struct device *dev) if (drv->pm->freeze) { error = drv->pm->freeze(dev); suspend_report_result(drv->pm->freeze, error); - } else { - pci_default_pm_suspend(pci_dev); } - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_FREEZE); pci_fixup_device(pci_fixup_suspend, pci_dev); } @@ -517,6 +539,7 @@ static int pci_pm_freeze(struct device *dev) static int pci_pm_freeze_noirq(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; @@ -525,8 +548,10 @@ static int pci_pm_freeze_noirq(struct device *dev) error = drv->pm->freeze_noirq(dev); suspend_report_result(drv->pm->freeze_noirq, error); } - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend_late(dev, PMSG_FREEZE); + } else { + pci_default_pm_suspend(pci_dev); } return error; @@ -534,14 +559,15 @@ static int pci_pm_freeze_noirq(struct device *dev) static int pci_pm_thaw(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { if (drv->pm->thaw) error = drv->pm->thaw(dev); - } else { - pci_fixup_device(pci_fixup_resume, to_pci_dev(dev)); + } else if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); error = pci_legacy_resume(dev); } @@ -550,13 +576,14 @@ static int pci_pm_thaw(struct device *dev) static int pci_pm_thaw_noirq(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (drv && drv->pm) { if (drv->pm->thaw_noirq) error = drv->pm->thaw_noirq(dev); - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); error = pci_legacy_resume_early(dev); } @@ -566,17 +593,18 @@ static int pci_pm_thaw_noirq(struct device *dev) static int pci_pm_poweroff(struct device *dev) { + struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev)); + pci_fixup_device(pci_fixup_suspend, pci_dev); if (drv && drv->pm) { if (drv->pm->poweroff) { error = drv->pm->poweroff(dev); suspend_report_result(drv->pm->poweroff, error); } - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_HIBERNATE); } @@ -593,7 +621,7 @@ static int pci_pm_poweroff_noirq(struct device *dev) error = drv->pm->poweroff_noirq(dev); suspend_report_result(drv->pm->poweroff_noirq, error); } - } else { + } else if (pci_has_legacy_pm_support(to_pci_dev(dev))) { error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE); } @@ -604,13 +632,15 @@ static int pci_pm_restore(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; - int error; + int error = 0; if (drv && drv->pm) { - error = drv->pm->restore ? drv->pm->restore(dev) : - pci_default_pm_resume(pci_dev); - } else { + if (drv->pm->restore) + error = drv->pm->restore(dev); + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume(dev); + } else { + error = pci_default_pm_resume_late(pci_dev); } pci_fixup_device(pci_fixup_resume, pci_dev); @@ -628,8 +658,10 @@ static int pci_pm_restore_noirq(struct device *dev) if (drv && drv->pm) { if (drv->pm->restore_noirq) error = drv->pm->restore_noirq(dev); - } else { + } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume_early(dev); + } else { + pci_default_pm_resume_early(pci_dev); } pci_fixup_device(pci_fixup_resume_early, pci_dev); -- cgit v1.2.3-70-g09d2 From 2debb4d2019fa05a0896f1591dea0e0dc21bc046 Mon Sep 17 00:00:00 2001 From: Chris Wright Date: Tue, 25 Nov 2008 19:36:10 -0800 Subject: PCI: allow pci driver to support only dynids commit b41d6cf38e27 (PCI: Check dynids driver_data value for validity) requires all drivers to include an id table to try and match driver_data. Before validating driver_data check driver has an id table. Acked-by: Jean Delvare Cc: Milton Miller Signed-off-by: Chris Wright Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 99d867bcf22..888191a3b0d 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -48,7 +48,7 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count) subdevice=PCI_ANY_ID, class=0, class_mask=0; unsigned long driver_data=0; int fields=0; - int retval; + int retval=0; fields = sscanf(buf, "%x %x %x %x %x %x %lx", &vendor, &device, &subvendor, &subdevice, @@ -58,16 +58,18 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count) /* Only accept driver_data values that match an existing id_table entry */ - retval = -EINVAL; - while (ids->vendor || ids->subvendor || ids->class_mask) { - if (driver_data == ids->driver_data) { - retval = 0; - break; + if (ids) { + retval = -EINVAL; + while (ids->vendor || ids->subvendor || ids->class_mask) { + if (driver_data == ids->driver_data) { + retval = 0; + break; + } + ids++; } - ids++; + if (retval) /* No match */ + return retval; } - if (retval) /* No match */ - return retval; dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); if (!dynid) -- cgit v1.2.3-70-g09d2 From 873392ca514f87eae39f53b6944caf85b1a047cb Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 31 Dec 2008 23:54:56 +1030 Subject: PCI: work_on_cpu: use in drivers/pci/pci-driver.c This uses work_on_cpu(), rather than altering the cpumask of the thread which we happen to be. Note the cleanups: 1) I've removed the CONFIG_NUMA test, since dev_to_node() returns -1 for !CONFIG_NUMA anyway and the compiler will eliminate it. 2) No need to reset mempolicy to default (a bad idea anyway) since work_on_cpu is run from a workqueue. Signed-off-by: Rusty Russell Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 52 +++++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 20 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 888191a3b0d..c3f76be832d 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "pci.h" /* @@ -185,32 +186,43 @@ static const struct pci_device_id *pci_match_device(struct pci_driver *drv, return pci_match_id(drv->id_table, dev); } +struct drv_dev_and_id { + struct pci_driver *drv; + struct pci_dev *dev; + const struct pci_device_id *id; +}; + +static long local_pci_probe(void *_ddi) +{ + struct drv_dev_and_id *ddi = _ddi; + + return ddi->drv->probe(ddi->dev, ddi->id); +} + static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, const struct pci_device_id *id) { - int error; -#ifdef CONFIG_NUMA - /* Execute driver initialization on node where the - device's bus is attached to. This way the driver likely - allocates its local memory on the right node without - any need to change it. */ - struct mempolicy *oldpol; - cpumask_t oldmask = current->cpus_allowed; - int node = dev_to_node(&dev->dev); + int error, node; + struct drv_dev_and_id ddi = { drv, dev, id }; + /* Execute driver initialization on node where the device's + bus is attached to. This way the driver likely allocates + its local memory on the right node without any need to + change it. */ + node = dev_to_node(&dev->dev); if (node >= 0) { + int cpu; node_to_cpumask_ptr(nodecpumask, node); - set_cpus_allowed_ptr(current, nodecpumask); - } - /* And set default memory allocation policy */ - oldpol = current->mempolicy; - current->mempolicy = NULL; /* fall back to system default policy */ -#endif - error = drv->probe(dev, id); -#ifdef CONFIG_NUMA - set_cpus_allowed_ptr(current, &oldmask); - current->mempolicy = oldpol; -#endif + + get_online_cpus(); + cpu = cpumask_any_and(nodecpumask, cpu_online_mask); + if (cpu < nr_cpu_ids) + error = work_on_cpu(cpu, local_pci_probe, &ddi); + else + error = local_pci_probe(&ddi); + put_online_cpus(); + } else + error = local_pci_probe(&ddi); return error; } -- cgit v1.2.3-70-g09d2 From c9b9972b3c88272be02d971346285d1c67fbb95f Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:02:36 +0100 Subject: PCI PM: Fix poweroff and restore callbacks pci_fixup_device() is called too early in pci_pm_poweroff() and too late in pci_pm_restore(). Moreover, pci_pm_restore_noirq() calls pci_fixup_device() twice and in a wrong way. Fix that. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index c3f76be832d..23bdf64411e 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -611,8 +611,6 @@ static int pci_pm_poweroff(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_suspend, pci_dev); - if (drv && drv->pm) { if (drv->pm->poweroff) { error = drv->pm->poweroff(dev); @@ -622,6 +620,8 @@ static int pci_pm_poweroff(struct device *dev) error = pci_legacy_suspend(dev, PMSG_HIBERNATE); } + pci_fixup_device(pci_fixup_suspend, pci_dev); + return error; } @@ -648,6 +648,8 @@ static int pci_pm_restore(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + pci_fixup_device(pci_fixup_resume, pci_dev); + if (drv && drv->pm) { if (drv->pm->restore) error = drv->pm->restore(dev); @@ -656,7 +658,6 @@ static int pci_pm_restore(struct device *dev) } else { error = pci_default_pm_resume_late(pci_dev); } - pci_fixup_device(pci_fixup_resume, pci_dev); return error; } @@ -667,7 +668,7 @@ static int pci_pm_restore_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume, pci_dev); + pci_fixup_device(pci_fixup_resume_early, pci_dev); if (drv && drv->pm) { if (drv->pm->restore_noirq) @@ -677,7 +678,6 @@ static int pci_pm_restore_noirq(struct device *dev) } else { pci_default_pm_resume_early(pci_dev); } - pci_fixup_device(pci_fixup_resume_early, pci_dev); return error; } -- cgit v1.2.3-70-g09d2 From fa58d305d9925b01830e535896a7227a868a9e15 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:03:42 +0100 Subject: PCI PM: Add suspend counterpart of pci_reenable_device PCI devices without drivers are not disabled during suspend and hibernation, but they are enabled during resume, with the help of pci_reenable_device(), so there is an unbalanced execution of pcibios_enable_device() in the resume code path. To correct this introduce function pci_disable_enabled_device() that will disable the argument device, if it is enabled when the function is being run, without updating the device's pci_dev structure and use it in the suspend code path to balance the pci_reenable_device() executed during resume. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 35 ++++++++++++++++++++++++++++++----- drivers/pci/pci.c | 36 ++++++++++++++++++++++++++++-------- drivers/pci/pci.h | 1 + 3 files changed, 59 insertions(+), 13 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 23bdf64411e..57cb0015a47 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -324,9 +324,19 @@ static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) /* * Default "suspend" method for devices that have no driver provided suspend, - * or not even a driver at all. + * or not even a driver at all (first part). + */ +static void pci_default_pm_suspend_early(struct pci_dev *pci_dev) +{ + /* If device is enabled at this point, disable it */ + pci_disable_enabled_device(pci_dev); +} + +/* + * Default "suspend" method for devices that have no driver provided suspend, + * or not even a driver at all (second part). */ -static void pci_default_pm_suspend(struct pci_dev *pci_dev) +static void pci_default_pm_suspend_late(struct pci_dev *pci_dev) { pci_save_state(pci_dev); /* @@ -377,7 +387,11 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state) i = drv->suspend(pci_dev, state); suspend_report_result(drv->suspend, i); } else { - pci_default_pm_suspend(pci_dev); + /* + * For compatibility with existing code with legacy PM support + * don't call pci_default_pm_suspend_early() here. + */ + pci_default_pm_suspend_late(pci_dev); } return i; } @@ -455,7 +469,10 @@ static int pci_pm_suspend(struct device *dev) } } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_SUSPEND); + } else { + pci_default_pm_suspend_early(pci_dev); } + pci_fixup_device(pci_fixup_suspend, pci_dev); return error; @@ -475,7 +492,7 @@ static int pci_pm_suspend_noirq(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); } else { - pci_default_pm_suspend(pci_dev); + pci_default_pm_suspend_late(pci_dev); } return error; @@ -546,6 +563,8 @@ static int pci_pm_freeze(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_FREEZE); pci_fixup_device(pci_fixup_suspend, pci_dev); + } else { + pci_default_pm_suspend_early(pci_dev); } return error; @@ -565,7 +584,7 @@ static int pci_pm_freeze_noirq(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend_late(dev, PMSG_FREEZE); } else { - pci_default_pm_suspend(pci_dev); + pci_default_pm_suspend_late(pci_dev); } return error; @@ -583,6 +602,8 @@ static int pci_pm_thaw(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { pci_fixup_device(pci_fixup_resume, pci_dev); error = pci_legacy_resume(dev); + } else { + pci_default_pm_resume_late(pci_dev); } return error; @@ -600,6 +621,8 @@ static int pci_pm_thaw_noirq(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); error = pci_legacy_resume_early(dev); + } else { + pci_default_pm_resume_early(pci_dev); } return error; @@ -618,6 +641,8 @@ static int pci_pm_poweroff(struct device *dev) } } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_HIBERNATE); + } else { + pci_default_pm_suspend_early(pci_dev); } pci_fixup_device(pci_fixup_suspend, pci_dev); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f3fd55df67d..6e309c8b47d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -970,6 +970,32 @@ void pcim_pin_device(struct pci_dev *pdev) */ void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {} +static void do_pci_disable_device(struct pci_dev *dev) +{ + u16 pci_command; + + pci_read_config_word(dev, PCI_COMMAND, &pci_command); + if (pci_command & PCI_COMMAND_MASTER) { + pci_command &= ~PCI_COMMAND_MASTER; + pci_write_config_word(dev, PCI_COMMAND, pci_command); + } + + pcibios_disable_device(dev); +} + +/** + * pci_disable_enabled_device - Disable device without updating enable_cnt + * @dev: PCI device to disable + * + * NOTE: This function is a backend of PCI power management routines and is + * not supposed to be called drivers. + */ +void pci_disable_enabled_device(struct pci_dev *dev) +{ + if (atomic_read(&dev->enable_cnt)) + do_pci_disable_device(dev); +} + /** * pci_disable_device - Disable PCI device after use * @dev: PCI device to be disabled @@ -984,7 +1010,6 @@ void pci_disable_device(struct pci_dev *dev) { struct pci_devres *dr; - u16 pci_command; dr = find_pci_dr(dev); if (dr) @@ -993,14 +1018,9 @@ pci_disable_device(struct pci_dev *dev) if (atomic_sub_return(1, &dev->enable_cnt) != 0) return; - pci_read_config_word(dev, PCI_COMMAND, &pci_command); - if (pci_command & PCI_COMMAND_MASTER) { - pci_command &= ~PCI_COMMAND_MASTER; - pci_write_config_word(dev, PCI_COMMAND, pci_command); - } - dev->is_busmaster = 0; + do_pci_disable_device(dev); - pcibios_disable_device(dev); + dev->is_busmaster = 0; } /** diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 211fd418f48..881dc15f8ef 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -44,6 +44,7 @@ struct pci_platform_pm_ops { }; extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); +extern void pci_disable_enabled_device(struct pci_dev *dev); extern void pci_pm_init(struct pci_dev *dev); extern void platform_pci_wakeup_init(struct pci_dev *dev); extern void pci_allocate_cap_save_buffers(struct pci_dev *dev); -- cgit v1.2.3-70-g09d2 From 571ff7584bb9e05fca0eb79752ae55a46faf3a98 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:05:05 +0100 Subject: PCI PM: Power-manage devices without drivers during suspend-resume PCI devices without drivers can be put into low power states during suspend with the help of pci_prepare_to_sleep() and prevented from generating wake-up events during resume with the help of pci_enable_wake(). However, it's better not to put bridges into low power states during suspend, because that might result in entire bus segments being powered off. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 33 +++++++++++++++++++++++++++++---- 1 file changed, 29 insertions(+), 4 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 57cb0015a47..2617ebb34e1 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -435,6 +435,31 @@ static int pci_legacy_resume_early(struct device *dev) return error; } +/* Auxiliary functions used by the new power management framework */ + +static bool pci_is_bridge(struct pci_dev *pci_dev) +{ + return !!(pci_dev->subordinate); +} + +static int pci_pm_default_resume(struct pci_dev *pci_dev) +{ + if (!pci_is_bridge(pci_dev)) + pci_enable_wake(pci_dev, PCI_D0, false); + + return pci_default_pm_resume_late(pci_dev); +} + +static void pci_pm_default_suspend(struct pci_dev *pci_dev) +{ + pci_default_pm_suspend_early(pci_dev); + + if (!pci_is_bridge(pci_dev)) + pci_prepare_to_sleep(pci_dev); +} + +/* New power management framework */ + static int pci_pm_prepare(struct device *dev) { struct device_driver *drv = dev->driver; @@ -470,7 +495,7 @@ static int pci_pm_suspend(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_SUSPEND); } else { - pci_default_pm_suspend_early(pci_dev); + pci_pm_default_suspend(pci_dev); } pci_fixup_device(pci_fixup_suspend, pci_dev); @@ -512,7 +537,7 @@ static int pci_pm_resume(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume(dev); } else { - error = pci_default_pm_resume_late(pci_dev); + error = pci_pm_default_resume(pci_dev); } return error; @@ -642,7 +667,7 @@ static int pci_pm_poweroff(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_suspend(dev, PMSG_HIBERNATE); } else { - pci_default_pm_suspend_early(pci_dev); + pci_pm_default_suspend(pci_dev); } pci_fixup_device(pci_fixup_suspend, pci_dev); @@ -681,7 +706,7 @@ static int pci_pm_restore(struct device *dev) } else if (pci_has_legacy_pm_support(pci_dev)) { error = pci_legacy_resume(dev); } else { - error = pci_default_pm_resume_late(pci_dev); + error = pci_pm_default_resume(pci_dev); } return error; -- cgit v1.2.3-70-g09d2 From 07e836e8d1f3688311d97fe1bf46980b0f9ae9c1 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:06:10 +0100 Subject: PCI PM: Move pci_has_legacy_pm_support Move pci_has_legacy_pm_support() closer to the functions that call it. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 2617ebb34e1..bfaa77d8853 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -314,14 +314,6 @@ static void pci_device_shutdown(struct device *dev) #ifdef CONFIG_PM_SLEEP -static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) -{ - struct pci_driver *drv = pci_dev->driver; - - return drv && (drv->suspend || drv->suspend_late || drv->resume - || drv->resume_early); -} - /* * Default "suspend" method for devices that have no driver provided suspend, * or not even a driver at all (first part). @@ -458,6 +450,14 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev) pci_prepare_to_sleep(pci_dev); } +static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) +{ + struct pci_driver *drv = pci_dev->driver; + + return drv && (drv->suspend || drv->suspend_late || drv->resume + || drv->resume_early); +} + /* New power management framework */ static int pci_pm_prepare(struct device *dev) -- cgit v1.2.3-70-g09d2 From 734104292ff77dc71fe626b4ebd91b314547ca1b Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:07:15 +0100 Subject: PCI PM: Avoid touching devices behind bridges in unknown state It generally is better to avoid accessing devices behind bridges that may not be in the D0 power state, because in that case the bridges' secondary buses may not be accessible. For this reason, during the early phase of resume (ie. with interrupts disabled), before restoring the standard config registers of a device, check the power state of the bridge the device is behind and postpone the restoration of the device's config space, as well as any other operations that would involve accessing the device, if that state is not D0. In such cases the restoration of the device's config space will be retried during the "normal" phase of resume (ie. with interrupts enabled), so that the bridge can be put into D0 before that happens. Also, save standard configuration registers of PCI devices during the "normal" phase of suspend (ie. with interrupts enabled), so that the bridges the devices are behind can be put into low power states (we don't put bridges into low power states at the moment, but we may want to do it in the future and it seems reasonable to design for that). Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 109 +++++++++++++++++++++++++++++++---------------- drivers/pci/pci.c | 2 +- drivers/pci/pci.h | 1 + 3 files changed, 74 insertions(+), 38 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index bfaa77d8853..750ee79c178 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -314,23 +314,12 @@ static void pci_device_shutdown(struct device *dev) #ifdef CONFIG_PM_SLEEP -/* - * Default "suspend" method for devices that have no driver provided suspend, - * or not even a driver at all (first part). - */ -static void pci_default_pm_suspend_early(struct pci_dev *pci_dev) -{ - /* If device is enabled at this point, disable it */ - pci_disable_enabled_device(pci_dev); -} - /* * Default "suspend" method for devices that have no driver provided suspend, * or not even a driver at all (second part). */ static void pci_default_pm_suspend_late(struct pci_dev *pci_dev) { - pci_save_state(pci_dev); /* * mark its power state as "unknown", since we don't know if * e.g. the BIOS will change its device state when we suspend. @@ -339,16 +328,6 @@ static void pci_default_pm_suspend_late(struct pci_dev *pci_dev) pci_dev->current_state = PCI_UNKNOWN; } -/* - * Default "resume" method for devices that have no driver provided resume, - * or not even a driver at all (first part). - */ -static void pci_default_pm_resume_early(struct pci_dev *pci_dev) -{ - /* restore the PCI config space */ - pci_restore_state(pci_dev); -} - /* * Default "resume" method for devices that have no driver provided resume, * or not even a driver at all (second part). @@ -379,9 +358,10 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state) i = drv->suspend(pci_dev, state); suspend_report_result(drv->suspend, i); } else { + pci_save_state(pci_dev); /* - * For compatibility with existing code with legacy PM support - * don't call pci_default_pm_suspend_early() here. + * This is for compatibility with existing code with legacy PM + * support. */ pci_default_pm_suspend_late(pci_dev); } @@ -410,7 +390,8 @@ static int pci_legacy_resume(struct device *dev) if (drv && drv->resume) { error = drv->resume(pci_dev); } else { - pci_default_pm_resume_early(pci_dev); + /* restore the PCI config space */ + pci_restore_state(pci_dev); error = pci_default_pm_resume_late(pci_dev); } return error; @@ -429,22 +410,72 @@ static int pci_legacy_resume_early(struct device *dev) /* Auxiliary functions used by the new power management framework */ +static int pci_restore_standard_config(struct pci_dev *pci_dev) +{ + struct pci_dev *parent = pci_dev->bus->self; + int error = 0; + + /* Check if the device's bus is operational */ + if (!parent || parent->current_state == PCI_D0) { + pci_restore_state(pci_dev); + pci_update_current_state(pci_dev, PCI_D0); + } else { + dev_warn(&pci_dev->dev, "unable to restore config, " + "bridge %s in low power state D%d\n", pci_name(parent), + parent->current_state); + pci_dev->current_state = PCI_UNKNOWN; + error = -EAGAIN; + } + + return error; +} + static bool pci_is_bridge(struct pci_dev *pci_dev) { return !!(pci_dev->subordinate); } +static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) +{ + if (pci_restore_standard_config(pci_dev)) + pci_fixup_device(pci_fixup_resume_early, pci_dev); +} + static int pci_pm_default_resume(struct pci_dev *pci_dev) { + /* + * pci_restore_standard_config() should have been called once already, + * but it would have failed if the device's parent bridge had not been + * in power state D0 at that time. Check it and try again if necessary. + */ + if (pci_dev->current_state == PCI_UNKNOWN) { + int error = pci_restore_standard_config(pci_dev); + if (error) + return error; + } + + pci_fixup_device(pci_fixup_resume, pci_dev); + if (!pci_is_bridge(pci_dev)) pci_enable_wake(pci_dev, PCI_D0, false); return pci_default_pm_resume_late(pci_dev); } +static void pci_pm_default_suspend_generic(struct pci_dev *pci_dev) +{ + /* If device is enabled at this point, disable it */ + pci_disable_enabled_device(pci_dev); + /* + * Save state with interrupts enabled, because in principle the bus the + * device is on may be put into a low power state after this code runs. + */ + pci_save_state(pci_dev); +} + static void pci_pm_default_suspend(struct pci_dev *pci_dev) { - pci_default_pm_suspend_early(pci_dev); + pci_pm_default_suspend_generic(pci_dev); if (!pci_is_bridge(pci_dev)) pci_prepare_to_sleep(pci_dev); @@ -529,12 +560,13 @@ static int pci_pm_resume(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume, pci_dev); - if (drv && drv->pm) { + pci_fixup_device(pci_fixup_resume, pci_dev); + if (drv->pm->resume) error = drv->pm->resume(dev); } else if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); error = pci_legacy_resume(dev); } else { error = pci_pm_default_resume(pci_dev); @@ -549,15 +581,16 @@ static int pci_pm_resume_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); - if (drv && drv->pm) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); + if (drv->pm->resume_noirq) error = drv->pm->resume_noirq(dev); } else if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); error = pci_legacy_resume_early(dev); } else { - pci_default_pm_resume_early(pci_dev); + pci_pm_default_resume_noirq(pci_dev); } return error; @@ -589,7 +622,7 @@ static int pci_pm_freeze(struct device *dev) error = pci_legacy_suspend(dev, PMSG_FREEZE); pci_fixup_device(pci_fixup_suspend, pci_dev); } else { - pci_default_pm_suspend_early(pci_dev); + pci_pm_default_suspend_generic(pci_dev); } return error; @@ -647,7 +680,7 @@ static int pci_pm_thaw_noirq(struct device *dev) pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); error = pci_legacy_resume_early(dev); } else { - pci_default_pm_resume_early(pci_dev); + pci_update_current_state(pci_dev, PCI_D0); } return error; @@ -698,12 +731,13 @@ static int pci_pm_restore(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume, pci_dev); - if (drv && drv->pm) { + pci_fixup_device(pci_fixup_resume, pci_dev); + if (drv->pm->restore) error = drv->pm->restore(dev); } else if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); error = pci_legacy_resume(dev); } else { error = pci_pm_default_resume(pci_dev); @@ -718,15 +752,16 @@ static int pci_pm_restore_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - pci_fixup_device(pci_fixup_resume_early, pci_dev); - if (drv && drv->pm) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); + if (drv->pm->restore_noirq) error = drv->pm->restore_noirq(dev); } else if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); error = pci_legacy_resume_early(dev); } else { - pci_default_pm_resume_early(pci_dev); + pci_pm_default_resume_noirq(pci_dev); } return error; diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 6e309c8b47d..e491fdedf70 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -527,7 +527,7 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) * @dev: PCI device to handle. * @state: State to cache in case the device doesn't have the PM capability */ -static void pci_update_current_state(struct pci_dev *dev, pci_power_t state) +void pci_update_current_state(struct pci_dev *dev, pci_power_t state) { if (dev->pm_cap) { u16 pmcsr; diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 881dc15f8ef..1351bb4addd 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -44,6 +44,7 @@ struct pci_platform_pm_ops { }; extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); +extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state); extern void pci_disable_enabled_device(struct pci_dev *dev); extern void pci_pm_init(struct pci_dev *dev); extern void platform_pci_wakeup_init(struct pci_dev *dev); -- cgit v1.2.3-70-g09d2 From bb8089454391ac5577215aec1f1991adcd4b4cbf Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 14:15:17 +0100 Subject: PCI PM: Rearrange code in pci-driver.c Rename two functions and rearrange code in drivers/pci/pci-driver.c so that it's easier to follow. In particular, separate invocations of the legacy callbacks from the rest of the new callbacks' code. Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 116 ++++++++++++++++++++++++++++++----------------- 1 file changed, 75 insertions(+), 41 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 750ee79c178..2e76945a1cd 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -318,7 +318,7 @@ static void pci_device_shutdown(struct device *dev) * Default "suspend" method for devices that have no driver provided suspend, * or not even a driver at all (second part). */ -static void pci_default_pm_suspend_late(struct pci_dev *pci_dev) +static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) { /* * mark its power state as "unknown", since we don't know if @@ -332,7 +332,7 @@ static void pci_default_pm_suspend_late(struct pci_dev *pci_dev) * Default "resume" method for devices that have no driver provided resume, * or not even a driver at all (second part). */ -static int pci_default_pm_resume_late(struct pci_dev *pci_dev) +static int pci_pm_reenable_device(struct pci_dev *pci_dev) { int retval; @@ -363,7 +363,7 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state) * This is for compatibility with existing code with legacy PM * support. */ - pci_default_pm_suspend_late(pci_dev); + pci_pm_set_unknown_state(pci_dev); } return i; } @@ -392,7 +392,7 @@ static int pci_legacy_resume(struct device *dev) } else { /* restore the PCI config space */ pci_restore_state(pci_dev); - error = pci_default_pm_resume_late(pci_dev); + error = pci_pm_reenable_device(pci_dev); } return error; } @@ -459,7 +459,7 @@ static int pci_pm_default_resume(struct pci_dev *pci_dev) if (!pci_is_bridge(pci_dev)) pci_enable_wake(pci_dev, PCI_D0, false); - return pci_default_pm_resume_late(pci_dev); + return pci_pm_reenable_device(pci_dev); } static void pci_pm_default_suspend_generic(struct pci_dev *pci_dev) @@ -484,9 +484,17 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev) static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) { struct pci_driver *drv = pci_dev->driver; - - return drv && (drv->suspend || drv->suspend_late || drv->resume + bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume || drv->resume_early); + + /* + * Legacy PM support is used by default, so warn if the new framework is + * supported as well. Drivers are supposed to support either the + * former, or the latter, but not both at the same time. + */ + WARN_ON(ret && drv->driver.pm); + + return ret; } /* New power management framework */ @@ -518,17 +526,21 @@ static int pci_pm_suspend(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + error = pci_legacy_suspend(dev, PMSG_SUSPEND); + goto Exit; + } + if (drv && drv->pm) { if (drv->pm->suspend) { error = drv->pm->suspend(dev); suspend_report_result(drv->pm->suspend, error); } - } else if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_SUSPEND); } else { pci_pm_default_suspend(pci_dev); } + Exit: pci_fixup_device(pci_fixup_suspend, pci_dev); return error; @@ -540,15 +552,16 @@ static int pci_pm_suspend_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_suspend_late(dev, PMSG_SUSPEND); + if (drv && drv->pm) { if (drv->pm->suspend_noirq) { error = drv->pm->suspend_noirq(dev); suspend_report_result(drv->pm->suspend_noirq, error); } - } else if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); } else { - pci_default_pm_suspend_late(pci_dev); + pci_pm_set_unknown_state(pci_dev); } return error; @@ -560,14 +573,16 @@ static int pci_pm_resume(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); + return pci_legacy_resume(dev); + } + if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume, pci_dev); if (drv->pm->resume) error = drv->pm->resume(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); - error = pci_legacy_resume(dev); } else { error = pci_pm_default_resume(pci_dev); } @@ -581,14 +596,16 @@ static int pci_pm_resume_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); + return pci_legacy_resume_early(dev); + } + if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume_early, pci_dev); if (drv->pm->resume_noirq) error = drv->pm->resume_noirq(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); - error = pci_legacy_resume_early(dev); } else { pci_pm_default_resume_noirq(pci_dev); } @@ -613,14 +630,17 @@ static int pci_pm_freeze(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + error = pci_legacy_suspend(dev, PMSG_FREEZE); + pci_fixup_device(pci_fixup_suspend, pci_dev); + return error; + } + if (drv && drv->pm) { if (drv->pm->freeze) { error = drv->pm->freeze(dev); suspend_report_result(drv->pm->freeze, error); } - } else if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_FREEZE); - pci_fixup_device(pci_fixup_suspend, pci_dev); } else { pci_pm_default_suspend_generic(pci_dev); } @@ -634,15 +654,16 @@ static int pci_pm_freeze_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_suspend_late(dev, PMSG_FREEZE); + if (drv && drv->pm) { if (drv->pm->freeze_noirq) { error = drv->pm->freeze_noirq(dev); suspend_report_result(drv->pm->freeze_noirq, error); } - } else if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend_late(dev, PMSG_FREEZE); } else { - pci_default_pm_suspend_late(pci_dev); + pci_pm_set_unknown_state(pci_dev); } return error; @@ -654,14 +675,16 @@ static int pci_pm_thaw(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); + return pci_legacy_resume(dev); + } + if (drv && drv->pm) { if (drv->pm->thaw) error = drv->pm->thaw(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); - error = pci_legacy_resume(dev); } else { - pci_default_pm_resume_late(pci_dev); + pci_pm_reenable_device(pci_dev); } return error; @@ -673,12 +696,14 @@ static int pci_pm_thaw_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); + return pci_legacy_resume_early(dev); + } + if (drv && drv->pm) { if (drv->pm->thaw_noirq) error = drv->pm->thaw_noirq(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); - error = pci_legacy_resume_early(dev); } else { pci_update_current_state(pci_dev, PCI_D0); } @@ -692,17 +717,21 @@ static int pci_pm_poweroff(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + error = pci_legacy_suspend(dev, PMSG_HIBERNATE); + goto Exit; + } + if (drv && drv->pm) { if (drv->pm->poweroff) { error = drv->pm->poweroff(dev); suspend_report_result(drv->pm->poweroff, error); } - } else if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_HIBERNATE); } else { pci_pm_default_suspend(pci_dev); } + Exit: pci_fixup_device(pci_fixup_suspend, pci_dev); return error; @@ -713,13 +742,14 @@ static int pci_pm_poweroff_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(to_pci_dev(dev))) + return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); + if (drv && drv->pm) { if (drv->pm->poweroff_noirq) { error = drv->pm->poweroff_noirq(dev); suspend_report_result(drv->pm->poweroff_noirq, error); } - } else if (pci_has_legacy_pm_support(to_pci_dev(dev))) { - error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE); } return error; @@ -731,14 +761,16 @@ static int pci_pm_restore(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume, pci_dev); + return pci_legacy_resume(dev); + } + if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume, pci_dev); if (drv->pm->restore) error = drv->pm->restore(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); - error = pci_legacy_resume(dev); } else { error = pci_pm_default_resume(pci_dev); } @@ -752,14 +784,16 @@ static int pci_pm_restore_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; + if (pci_has_legacy_pm_support(pci_dev)) { + pci_fixup_device(pci_fixup_resume_early, pci_dev); + return pci_legacy_resume_early(dev); + } + if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume_early, pci_dev); if (drv->pm->restore_noirq) error = drv->pm->restore_noirq(dev); - } else if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); - error = pci_legacy_resume_early(dev); } else { pci_pm_default_resume_noirq(pci_dev); } -- cgit v1.2.3-70-g09d2 From ad8cfa1defee14a5181d9b63e666318c51cfaeed Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:09:37 +0100 Subject: PCI PM: Call pci_fixup_device from legacy routines The size of drivers/pci/pci-driver.c can be reduced quite a bit if pci_fixup_device() is called from the legacy PM callbacks, so make it happen. No functional changes should result from this. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 52 ++++++++++++++++++------------------------------ 1 file changed, 19 insertions(+), 33 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 2e76945a1cd..02bf4d4125e 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -365,6 +365,9 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state) */ pci_pm_set_unknown_state(pci_dev); } + + pci_fixup_device(pci_fixup_suspend, pci_dev); + return i; } @@ -387,6 +390,8 @@ static int pci_legacy_resume(struct device *dev) struct pci_dev * pci_dev = to_pci_dev(dev); struct pci_driver * drv = pci_dev->driver; + pci_fixup_device(pci_fixup_resume, pci_dev); + if (drv && drv->resume) { error = drv->resume(pci_dev); } else { @@ -403,6 +408,8 @@ static int pci_legacy_resume_early(struct device *dev) struct pci_dev * pci_dev = to_pci_dev(dev); struct pci_driver * drv = pci_dev->driver; + pci_fixup_device(pci_fixup_resume_early, pci_dev); + if (drv && drv->resume_early) error = drv->resume_early(pci_dev); return error; @@ -526,10 +533,8 @@ static int pci_pm_suspend(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_SUSPEND); - goto Exit; - } + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_suspend(dev, PMSG_SUSPEND); if (drv && drv->pm) { if (drv->pm->suspend) { @@ -540,7 +545,6 @@ static int pci_pm_suspend(struct device *dev) pci_pm_default_suspend(pci_dev); } - Exit: pci_fixup_device(pci_fixup_suspend, pci_dev); return error; @@ -573,10 +577,8 @@ static int pci_pm_resume(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - } if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume, pci_dev); @@ -596,10 +598,8 @@ static int pci_pm_resume_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - } if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume_early, pci_dev); @@ -630,11 +630,8 @@ static int pci_pm_freeze(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_FREEZE); - pci_fixup_device(pci_fixup_suspend, pci_dev); - return error; - } + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_suspend(dev, PMSG_FREEZE); if (drv && drv->pm) { if (drv->pm->freeze) { @@ -675,10 +672,8 @@ static int pci_pm_thaw(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - } if (drv && drv->pm) { if (drv->pm->thaw) @@ -696,10 +691,8 @@ static int pci_pm_thaw_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - } if (drv && drv->pm) { if (drv->pm->thaw_noirq) @@ -717,10 +710,8 @@ static int pci_pm_poweroff(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - error = pci_legacy_suspend(dev, PMSG_HIBERNATE); - goto Exit; - } + if (pci_has_legacy_pm_support(pci_dev)) + return pci_legacy_suspend(dev, PMSG_HIBERNATE); if (drv && drv->pm) { if (drv->pm->poweroff) { @@ -731,7 +722,6 @@ static int pci_pm_poweroff(struct device *dev) pci_pm_default_suspend(pci_dev); } - Exit: pci_fixup_device(pci_fixup_suspend, pci_dev); return error; @@ -761,10 +751,8 @@ static int pci_pm_restore(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume, pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - } if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume, pci_dev); @@ -784,10 +772,8 @@ static int pci_pm_restore_noirq(struct device *dev) struct device_driver *drv = dev->driver; int error = 0; - if (pci_has_legacy_pm_support(pci_dev)) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); + if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - } if (drv && drv->pm) { pci_fixup_device(pci_fixup_resume_early, pci_dev); -- cgit v1.2.3-70-g09d2 From d67e37d7933ba3b28a63ff38c957e433aaca5dc4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:11:28 +0100 Subject: PCI PM: Run default PM callbacks for all devices using new framework It should be quite clear that it generally makes sense to execute the default PM callbacks (ie. the callbacks used for handling suspend, hibernation and resume of PCI devices without drivers) for all devices. Of course, the drivers that provide legacy PCI PM support (ie. the ->suspend, ->suspend_late, ->resume_early or ->resume hooks in the pci_driver structure), carry out these operations too, so we can't do it for devices with such drivers. Still, we can make the default PM callbacks run for devices with drivers using the new framework (ie. implement the pm object), since there are no such drivers at the moment. This also simplifies the code and makes it smaller. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 135 +++++++++++++++++++---------------------------- 1 file changed, 53 insertions(+), 82 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 02bf4d4125e..b7e67c2f40b 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -486,6 +486,8 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev) if (!pci_is_bridge(pci_dev)) pci_prepare_to_sleep(pci_dev); + + pci_fixup_device(pci_fixup_suspend, pci_dev); } static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) @@ -536,16 +538,13 @@ static int pci_pm_suspend(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_suspend(dev, PMSG_SUSPEND); - if (drv && drv->pm) { - if (drv->pm->suspend) { - error = drv->pm->suspend(dev); - suspend_report_result(drv->pm->suspend, error); - } - } else { - pci_pm_default_suspend(pci_dev); + if (drv && drv->pm && drv->pm->suspend) { + error = drv->pm->suspend(dev); + suspend_report_result(drv->pm->suspend, error); } - pci_fixup_device(pci_fixup_suspend, pci_dev); + if (!error) + pci_pm_default_suspend(pci_dev); return error; } @@ -559,15 +558,14 @@ static int pci_pm_suspend_noirq(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_suspend_late(dev, PMSG_SUSPEND); - if (drv && drv->pm) { - if (drv->pm->suspend_noirq) { - error = drv->pm->suspend_noirq(dev); - suspend_report_result(drv->pm->suspend_noirq, error); - } - } else { - pci_pm_set_unknown_state(pci_dev); + if (drv && drv->pm && drv->pm->suspend_noirq) { + error = drv->pm->suspend_noirq(dev); + suspend_report_result(drv->pm->suspend_noirq, error); } + if (!error) + pci_pm_set_unknown_state(pci_dev); + return error; } @@ -580,14 +578,10 @@ static int pci_pm_resume(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - if (drv && drv->pm) { - pci_fixup_device(pci_fixup_resume, pci_dev); + error = pci_pm_default_resume(pci_dev); - if (drv->pm->resume) - error = drv->pm->resume(dev); - } else { - error = pci_pm_default_resume(pci_dev); - } + if (!error && drv && drv->pm && drv->pm->resume) + error = drv->pm->resume(dev); return error; } @@ -601,14 +595,10 @@ static int pci_pm_resume_noirq(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - if (drv && drv->pm) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); + pci_pm_default_resume_noirq(pci_dev); - if (drv->pm->resume_noirq) - error = drv->pm->resume_noirq(dev); - } else { - pci_pm_default_resume_noirq(pci_dev); - } + if (drv && drv->pm && drv->pm->resume_noirq) + error = drv->pm->resume_noirq(dev); return error; } @@ -633,15 +623,14 @@ static int pci_pm_freeze(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_suspend(dev, PMSG_FREEZE); - if (drv && drv->pm) { - if (drv->pm->freeze) { - error = drv->pm->freeze(dev); - suspend_report_result(drv->pm->freeze, error); - } - } else { - pci_pm_default_suspend_generic(pci_dev); + if (drv && drv->pm && drv->pm->freeze) { + error = drv->pm->freeze(dev); + suspend_report_result(drv->pm->freeze, error); } + if (!error) + pci_pm_default_suspend_generic(pci_dev); + return error; } @@ -654,15 +643,14 @@ static int pci_pm_freeze_noirq(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_suspend_late(dev, PMSG_FREEZE); - if (drv && drv->pm) { - if (drv->pm->freeze_noirq) { - error = drv->pm->freeze_noirq(dev); - suspend_report_result(drv->pm->freeze_noirq, error); - } - } else { - pci_pm_set_unknown_state(pci_dev); + if (drv && drv->pm && drv->pm->freeze_noirq) { + error = drv->pm->freeze_noirq(dev); + suspend_report_result(drv->pm->freeze_noirq, error); } + if (!error) + pci_pm_set_unknown_state(pci_dev); + return error; } @@ -675,12 +663,10 @@ static int pci_pm_thaw(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - if (drv && drv->pm) { - if (drv->pm->thaw) - error = drv->pm->thaw(dev); - } else { - pci_pm_reenable_device(pci_dev); - } + pci_pm_reenable_device(pci_dev); + + if (drv && drv->pm && drv->pm->thaw) + error = drv->pm->thaw(dev); return error; } @@ -694,12 +680,10 @@ static int pci_pm_thaw_noirq(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - if (drv && drv->pm) { - if (drv->pm->thaw_noirq) - error = drv->pm->thaw_noirq(dev); - } else { - pci_update_current_state(pci_dev, PCI_D0); - } + pci_update_current_state(pci_dev, PCI_D0); + + if (drv && drv->pm && drv->pm->thaw_noirq) + error = drv->pm->thaw_noirq(dev); return error; } @@ -713,16 +697,13 @@ static int pci_pm_poweroff(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_suspend(dev, PMSG_HIBERNATE); - if (drv && drv->pm) { - if (drv->pm->poweroff) { - error = drv->pm->poweroff(dev); - suspend_report_result(drv->pm->poweroff, error); - } - } else { - pci_pm_default_suspend(pci_dev); + if (drv && drv->pm && drv->pm->poweroff) { + error = drv->pm->poweroff(dev); + suspend_report_result(drv->pm->poweroff, error); } - pci_fixup_device(pci_fixup_suspend, pci_dev); + if (!error) + pci_pm_default_suspend(pci_dev); return error; } @@ -735,11 +716,9 @@ static int pci_pm_poweroff_noirq(struct device *dev) if (pci_has_legacy_pm_support(to_pci_dev(dev))) return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); - if (drv && drv->pm) { - if (drv->pm->poweroff_noirq) { - error = drv->pm->poweroff_noirq(dev); - suspend_report_result(drv->pm->poweroff_noirq, error); - } + if (drv && drv->pm && drv->pm->poweroff_noirq) { + error = drv->pm->poweroff_noirq(dev); + suspend_report_result(drv->pm->poweroff_noirq, error); } return error; @@ -754,14 +733,10 @@ static int pci_pm_restore(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume(dev); - if (drv && drv->pm) { - pci_fixup_device(pci_fixup_resume, pci_dev); + error = pci_pm_default_resume(pci_dev); - if (drv->pm->restore) - error = drv->pm->restore(dev); - } else { - error = pci_pm_default_resume(pci_dev); - } + if (!error && drv && drv->pm && drv->pm->restore) + error = drv->pm->restore(dev); return error; } @@ -775,14 +750,10 @@ static int pci_pm_restore_noirq(struct device *dev) if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); - if (drv && drv->pm) { - pci_fixup_device(pci_fixup_resume_early, pci_dev); + pci_pm_default_resume_noirq(pci_dev); - if (drv->pm->restore_noirq) - error = drv->pm->restore_noirq(dev); - } else { - pci_pm_default_resume_noirq(pci_dev); - } + if (drv && drv->pm && drv->pm->restore_noirq) + error = drv->pm->restore_noirq(dev); return error; } -- cgit v1.2.3-70-g09d2 From f6dc1e5e3d4b523e1616b43beddb04e4fb1d376a Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jan 2009 13:12:22 +0100 Subject: PCI PM: Put PM callbacks in the order of execution Put PM callbacks in drivers/pci/pci-driver.c in the order in which they are executed which makes it much easier to follow the code. No functional changes should result from this. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/pci/pci-driver.c | 86 ++++++++++++++++++++++++------------------------ 1 file changed, 43 insertions(+), 43 deletions(-) (limited to 'drivers/pci/pci-driver.c') diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index b7e67c2f40b..c697f268085 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -384,6 +384,19 @@ static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) return i; } +static int pci_legacy_resume_early(struct device *dev) +{ + int error = 0; + struct pci_dev * pci_dev = to_pci_dev(dev); + struct pci_driver * drv = pci_dev->driver; + + pci_fixup_device(pci_fixup_resume_early, pci_dev); + + if (drv && drv->resume_early) + error = drv->resume_early(pci_dev); + return error; +} + static int pci_legacy_resume(struct device *dev) { int error; @@ -402,19 +415,6 @@ static int pci_legacy_resume(struct device *dev) return error; } -static int pci_legacy_resume_early(struct device *dev) -{ - int error = 0; - struct pci_dev * pci_dev = to_pci_dev(dev); - struct pci_driver * drv = pci_dev->driver; - - pci_fixup_device(pci_fixup_resume_early, pci_dev); - - if (drv && drv->resume_early) - error = drv->resume_early(pci_dev); - return error; -} - /* Auxiliary functions used by the new power management framework */ static int pci_restore_standard_config(struct pci_dev *pci_dev) @@ -569,36 +569,36 @@ static int pci_pm_suspend_noirq(struct device *dev) return error; } -static int pci_pm_resume(struct device *dev) +static int pci_pm_resume_noirq(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume(dev); + return pci_legacy_resume_early(dev); - error = pci_pm_default_resume(pci_dev); + pci_pm_default_resume_noirq(pci_dev); - if (!error && drv && drv->pm && drv->pm->resume) - error = drv->pm->resume(dev); + if (drv && drv->pm && drv->pm->resume_noirq) + error = drv->pm->resume_noirq(dev); return error; } -static int pci_pm_resume_noirq(struct device *dev) +static int pci_pm_resume(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume_early(dev); + return pci_legacy_resume(dev); - pci_pm_default_resume_noirq(pci_dev); + error = pci_pm_default_resume(pci_dev); - if (drv && drv->pm && drv->pm->resume_noirq) - error = drv->pm->resume_noirq(dev); + if (!error && drv && drv->pm && drv->pm->resume) + error = drv->pm->resume(dev); return error; } @@ -654,36 +654,36 @@ static int pci_pm_freeze_noirq(struct device *dev) return error; } -static int pci_pm_thaw(struct device *dev) +static int pci_pm_thaw_noirq(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume(dev); + return pci_legacy_resume_early(dev); - pci_pm_reenable_device(pci_dev); + pci_update_current_state(pci_dev, PCI_D0); - if (drv && drv->pm && drv->pm->thaw) - error = drv->pm->thaw(dev); + if (drv && drv->pm && drv->pm->thaw_noirq) + error = drv->pm->thaw_noirq(dev); return error; } -static int pci_pm_thaw_noirq(struct device *dev) +static int pci_pm_thaw(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume_early(dev); + return pci_legacy_resume(dev); - pci_update_current_state(pci_dev, PCI_D0); + pci_pm_reenable_device(pci_dev); - if (drv && drv->pm && drv->pm->thaw_noirq) - error = drv->pm->thaw_noirq(dev); + if (drv && drv->pm && drv->pm->thaw) + error = drv->pm->thaw(dev); return error; } @@ -724,36 +724,36 @@ static int pci_pm_poweroff_noirq(struct device *dev) return error; } -static int pci_pm_restore(struct device *dev) +static int pci_pm_restore_noirq(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume(dev); + return pci_legacy_resume_early(dev); - error = pci_pm_default_resume(pci_dev); + pci_pm_default_resume_noirq(pci_dev); - if (!error && drv && drv->pm && drv->pm->restore) - error = drv->pm->restore(dev); + if (drv && drv->pm && drv->pm->restore_noirq) + error = drv->pm->restore_noirq(dev); return error; } -static int pci_pm_restore_noirq(struct device *dev) +static int pci_pm_restore(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct device_driver *drv = dev->driver; int error = 0; if (pci_has_legacy_pm_support(pci_dev)) - return pci_legacy_resume_early(dev); + return pci_legacy_resume(dev); - pci_pm_default_resume_noirq(pci_dev); + error = pci_pm_default_resume(pci_dev); - if (drv && drv->pm && drv->pm->restore_noirq) - error = drv->pm->restore_noirq(dev); + if (!error && drv && drv->pm && drv->pm->restore) + error = drv->pm->restore(dev); return error; } -- cgit v1.2.3-70-g09d2