summaryrefslogtreecommitdiffstats
path: root/drivers/pci
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c3
-rw-r--r--drivers/pci/hotplug/cpci_hotplug_pci.c3
-rw-r--r--drivers/pci/hotplug/cpqphp_ctrl.c3
-rw-r--r--drivers/pci/hotplug/pciehp_pci.c3
-rw-r--r--drivers/pci/hotplug/rpadlpar_core.c3
-rw-r--r--drivers/pci/hotplug/shpchp_pci.c3
-rw-r--r--drivers/pci/pci-acpi.c8
-rw-r--r--drivers/pci/pci-driver.c33
-rw-r--r--drivers/pci/pci-sysfs.c40
-rw-r--r--drivers/pci/pci.c21
-rw-r--r--drivers/pci/pci.h2
-rw-r--r--drivers/pci/probe.c4
-rw-r--r--drivers/pci/setup-bus.c4
13 files changed, 99 insertions, 31 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index bb945e33b1e..75e17833021 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -515,8 +515,7 @@ static void enable_slot(struct acpiphp_slot *slot)
if (PCI_SLOT(dev->devfn) != slot->device)
continue;
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
- dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
+ if (pci_is_bridge(dev)) {
max = pci_scan_bridge(bus, dev, max, pass);
if (pass && dev->subordinate) {
check_hotplug_bridge(slot, dev);
diff --git a/drivers/pci/hotplug/cpci_hotplug_pci.c b/drivers/pci/hotplug/cpci_hotplug_pci.c
index b238a1a2837..f6ef64c2ccb 100644
--- a/drivers/pci/hotplug/cpci_hotplug_pci.c
+++ b/drivers/pci/hotplug/cpci_hotplug_pci.c
@@ -289,8 +289,7 @@ int cpci_configure_slot(struct slot *slot)
list_for_each_entry(dev, &parent->devices, bus_list)
if (PCI_SLOT(dev->devfn) != PCI_SLOT(slot->devfn))
continue;
- if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
- (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
+ if (pci_is_bridge(dev))
pci_hp_add_bridge(dev);
diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
index 11845b79679..f593585f278 100644
--- a/drivers/pci/hotplug/cpqphp_ctrl.c
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -709,7 +709,8 @@ static struct pci_resource *get_max_resource(struct pci_resource **head, u32 siz
temp = temp->next;
}
- temp->next = max->next;
+ if (temp)
+ temp->next = max->next;
}
max->next = NULL;
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index 1b533060ce6..b6cb1df6709 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -62,8 +62,7 @@ int pciehp_configure_device(struct slot *p_slot)
}
list_for_each_entry(dev, &parent->devices, bus_list)
- if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
- (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
+ if (pci_is_bridge(dev))
pci_hp_add_bridge(dev);
pci_assign_unassigned_bridge_resources(bridge);
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 4fcdeedda31..7660232ef46 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -157,8 +157,7 @@ static void dlpar_pci_add_bus(struct device_node *dn)
}
/* Scan below the new bridge */
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
- dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+ if (pci_is_bridge(dev))
of_scan_pci_bridge(dev);
/* Map IO space for child bus, which may or may not succeed */
diff --git a/drivers/pci/hotplug/shpchp_pci.c b/drivers/pci/hotplug/shpchp_pci.c
index 18209ebc097..9202d133485 100644
--- a/drivers/pci/hotplug/shpchp_pci.c
+++ b/drivers/pci/hotplug/shpchp_pci.c
@@ -64,8 +64,7 @@ int shpchp_configure_device(struct slot *p_slot)
list_for_each_entry(dev, &parent->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != p_slot->device)
continue;
- if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
- (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
+ if (pci_is_bridge(dev))
pci_hp_add_bridge(dev);
}
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index f49abef8848..ca4927ba843 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -309,13 +309,7 @@ static struct acpi_device *acpi_pci_find_companion(struct device *dev)
bool check_children;
u64 addr;
- /*
- * pci_is_bridge() is not suitable here, because pci_dev->subordinate
- * is set only after acpi_pci_find_device() has been called for the
- * given device.
- */
- check_children = pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE
- || pci_dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
+ check_children = pci_is_bridge(pci_dev);
/* Please ref to ACPI spec for the syntax of _ADR */
addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr,
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index ff236ed4f5c..837d71f5390 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -236,6 +236,13 @@ const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
return NULL;
}
+static const struct pci_device_id pci_device_id_any = {
+ .vendor = PCI_ANY_ID,
+ .device = PCI_ANY_ID,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+};
+
/**
* pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
* @drv: the PCI driver to match against
@@ -249,18 +256,30 @@ static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
struct pci_dev *dev)
{
struct pci_dynid *dynid;
+ const struct pci_device_id *found_id = NULL;
+
+ /* When driver_override is set, only bind to the matching driver */
+ if (dev->driver_override && strcmp(dev->driver_override, drv->name))
+ return NULL;
/* Look at the dynamic ids first, before the static ones */
spin_lock(&drv->dynids.lock);
list_for_each_entry(dynid, &drv->dynids.list, node) {
if (pci_match_one_device(&dynid->id, dev)) {
- spin_unlock(&drv->dynids.lock);
- return &dynid->id;
+ found_id = &dynid->id;
+ break;
}
}
spin_unlock(&drv->dynids.lock);
- return pci_match_id(drv->id_table, dev);
+ if (!found_id)
+ found_id = pci_match_id(drv->id_table, dev);
+
+ /* driver_override will always match, send a dummy id */
+ if (!found_id && dev->driver_override)
+ found_id = &pci_device_id_any;
+
+ return found_id;
}
struct drv_dev_and_id {
@@ -600,14 +619,14 @@ static void pci_pm_default_resume(struct pci_dev *pci_dev)
{
pci_fixup_device(pci_fixup_resume, pci_dev);
- if (!pci_is_bridge(pci_dev))
+ if (!pci_has_subordinate(pci_dev))
pci_enable_wake(pci_dev, PCI_D0, false);
}
static void pci_pm_default_suspend(struct pci_dev *pci_dev)
{
/* Disable non-bridge devices without PM support */
- if (!pci_is_bridge(pci_dev))
+ if (!pci_has_subordinate(pci_dev))
pci_disable_enabled_device(pci_dev);
}
@@ -737,7 +756,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
if (!pci_dev->state_saved) {
pci_save_state(pci_dev);
- if (!pci_is_bridge(pci_dev))
+ if (!pci_has_subordinate(pci_dev))
pci_prepare_to_sleep(pci_dev);
}
@@ -991,7 +1010,7 @@ static int pci_pm_poweroff_noirq(struct device *dev)
return error;
}
- if (!pci_dev->state_saved && !pci_is_bridge(pci_dev))
+ if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev))
pci_prepare_to_sleep(pci_dev);
/*
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index b7333fa5f80..84c350994b0 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -514,6 +514,45 @@ static struct device_attribute sriov_numvfs_attr =
sriov_numvfs_show, sriov_numvfs_store);
#endif /* CONFIG_PCI_IOV */
+static ssize_t driver_override_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ char *driver_override, *old = pdev->driver_override, *cp;
+
+ if (count > PATH_MAX)
+ return -EINVAL;
+
+ driver_override = kstrndup(buf, count, GFP_KERNEL);
+ if (!driver_override)
+ return -ENOMEM;
+
+ cp = strchr(driver_override, '\n');
+ if (cp)
+ *cp = '\0';
+
+ if (strlen(driver_override)) {
+ pdev->driver_override = driver_override;
+ } else {
+ kfree(driver_override);
+ pdev->driver_override = NULL;
+ }
+
+ kfree(old);
+
+ return count;
+}
+
+static ssize_t driver_override_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ return sprintf(buf, "%s\n", pdev->driver_override);
+}
+static DEVICE_ATTR_RW(driver_override);
+
static struct attribute *pci_dev_attrs[] = {
&dev_attr_resource.attr,
&dev_attr_vendor.attr,
@@ -539,6 +578,7 @@ static struct attribute *pci_dev_attrs[] = {
#ifdef CONFIG_OF
&dev_attr_devspec.attr,
#endif
+ &dev_attr_driver_override.attr,
NULL,
};
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 39012831867..f988bb18eba 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3305,8 +3305,27 @@ static void pci_dev_unlock(struct pci_dev *dev)
pci_cfg_access_unlock(dev);
}
+/**
+ * pci_reset_notify - notify device driver of reset
+ * @dev: device to be notified of reset
+ * @prepare: 'true' if device is about to be reset; 'false' if reset attempt
+ * completed
+ *
+ * Must be called prior to device access being disabled and after device
+ * access is restored.
+ */
+static void pci_reset_notify(struct pci_dev *dev, bool prepare)
+{
+ const struct pci_error_handlers *err_handler =
+ dev->driver ? dev->driver->err_handler : NULL;
+ if (err_handler && err_handler->reset_notify)
+ err_handler->reset_notify(dev, prepare);
+}
+
static void pci_dev_save_and_disable(struct pci_dev *dev)
{
+ pci_reset_notify(dev, true);
+
/*
* Wake-up device prior to save. PM registers default to D0 after
* reset and a simple register restore doesn't reliably return
@@ -3328,6 +3347,7 @@ static void pci_dev_save_and_disable(struct pci_dev *dev)
static void pci_dev_restore(struct pci_dev *dev)
{
pci_restore_state(dev);
+ pci_reset_notify(dev, false);
}
static int pci_dev_reset(struct pci_dev *dev, int probe)
@@ -3344,6 +3364,7 @@ static int pci_dev_reset(struct pci_dev *dev, int probe)
return rc;
}
+
/**
* __pci_reset_function - reset a PCI device function
* @dev: PCI device to reset
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fe233a3099c..0601890db22 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -77,7 +77,7 @@ static inline void pci_wakeup_event(struct pci_dev *dev)
pm_wakeup_event(&dev->dev, 100);
}
-static inline bool pci_is_bridge(struct pci_dev *pci_dev)
+static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
{
return !!(pci_dev->subordinate);
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 52d05e054cd..36f1fd174b0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1225,6 +1225,7 @@ static void pci_release_dev(struct device *dev)
pci_release_of_node(pci_dev);
pcibios_release_device(pci_dev);
pci_bus_put(pci_dev->bus);
+ kfree(pci_dev->driver_override);
kfree(pci_dev);
}
@@ -1680,8 +1681,7 @@ unsigned int pci_scan_child_bus(struct pci_bus *bus)
for (pass=0; pass < 2; pass++)
list_for_each_entry(dev, &bus->devices, bus_list) {
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
- dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+ if (pci_is_bridge(dev))
max = pci_scan_bridge(bus, dev, max, pass);
}
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index d9fdcea4412..fd9b545c3cf 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1716,9 +1716,7 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus)
down_read(&pci_bus_sem);
list_for_each_entry(dev, &bus->devices, bus_list)
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
- dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
- if (dev->subordinate)
+ if (pci_is_bridge(dev) && pci_has_subordinate(dev))
__pci_bus_size_bridges(dev->subordinate,
&add_list);
up_read(&pci_bus_sem);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 10:49:31 +0000