[PATCH] PCI: don't override drv->shutdown unconditionally

There are many drivers that have been setting the generic driver
model level shutdown callback, and pci thus must not override it.

Without this patch we can have really bad data loss on various
raid controllers.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index fe98553c978f..f315df2005bc 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -393,7 +393,10 @@ int pci_register_driver(struct pci_driver *drv)
         drv->driver.bus = &pci_bus_type;
         drv->driver.probe = pci_device_probe;
         drv->driver.remove = pci_device_remove;
-        drv->driver.shutdown = pci_device_shutdown,
+        /* FIXME, once all of the existing PCI drivers have been fixed to set
+         * the pci shutdown function, this test can go away. */
+        if (!drv->driver.shutdown)
+                drv->driver.shutdown = pci_device_shutdown,
         drv->driver.owner = drv->owner;
         drv->driver.kobj.ktype = &pci_driver_kobj_type;
         pci_init_dynids(&drv->dynids);