diff options
| author | Myron Stowe <myron.stowe@redhat.com> | 2012-07-09 15:36:46 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-07-09 20:56:45 -0600 |
| commit | 735bff10c157fdbba2291e10ca3e28a59c7acc1c (patch) | |
| tree | 2cae34fe274546d5a9ab4e7a24699833aab0e8eb | |
| parent | 3274c8eb26896fc4cae3b199de71e985e20771a9 (diff) | |
PCI: call final fixups hot-added devices
Final fixups are currently applied only at boot-time by
pci_apply_final_quirks(), which is an fs_initcall(). Hot-added devices
don't get these fixups, so they may not be completely initialized.
This patch makes us run final fixups for hot-added devices in
pci_bus_add_device() just before the new device becomes eligible for driver
binding.
This patch keeps the fs_initcall() for devices present at boot because we
do resource assignment between pci_bus_add_device and the fs_initcall(),
and we don't want to break any fixups that depend on that assignment. This
is a design issue that may be addressed in the future -- any resource
assignment should be done *before* device_add().
[bhelgaas: changelog]
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | drivers/pci/bus.c | 4 | ||||
| -rw-r--r-- | drivers/pci/quirks.c | 18 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 4ce5ef2f282..b511bd4e3f7 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -164,6 +164,10 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, int pci_bus_add_device(struct pci_dev *dev) { int retval; + extern bool pci_fixup_final_inited; + + if (pci_fixup_final_inited) + pci_fixup_device(pci_fixup_final, dev); retval = device_add(&dev->dev); if (retval) return retval; diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 4565f4ff8ae..d8e9a0edf93 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3028,6 +3028,22 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) } EXPORT_SYMBOL(pci_fixup_device); + +/* + * The global variable 'pci_fixup_final_inited' is being used as a interim + * solution for calling the final quirks only during hot-plug events (not + * during boot processing). + * + * When the boot path's PCI device setup sequencing is addressed, we can + * remove the instance, and usages of, 'pci_fixup_final_inited' along with + * removing 'fs_initcall_sync(pci_apply_final_quirks);' and end up with a + * single, uniform, solution that satisfies both the boot path and the + * various hot-plug event paths. + * + * ToDo: Remove 'pci_fixup_final_inited' + */ +bool pci_fixup_final_inited; + static int __init pci_apply_final_quirks(void) { struct pci_dev *dev = NULL; @@ -3058,6 +3074,8 @@ static int __init pci_apply_final_quirks(void) pci_cache_line_size = pci_dfl_cache_line_size; } } + pci_fixup_final_inited = 1; + if (!pci_cache_line_size) { printk(KERN_DEBUG "PCI: CLS %u bytes, default %u\n", cls << 2, pci_dfl_cache_line_size << 2); |