PCI: Introduce /sys/bus/pci/rescan

This interface allows the user to force a rescan of all PCI buses
in system, and rediscover devices that have been removed earlier.

pci_bus_attrs implementation from Trent Piepho.

Thanks to Vegard Nossum for discovering locking issues with the
sysfs interface.

Cc: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 87a5ddbb324f..95d198570290 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1049,6 +1049,7 @@ struct bus_type pci_bus_type = {
         .remove         = pci_device_remove,
         .shutdown       = pci_device_shutdown,
         .dev_attrs      = pci_dev_attrs,
+        .bus_attrs      = pci_bus_attrs,
         .pm             = PCI_PM_OPS_PTR,
 };