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

[Christoph Hellwig <hch@lst.de>]

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

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


Index: linux-2.6/drivers/pci/pci-driver.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci-driver.c	2005-05-05 11:01:03.000000000 +0200
+++ linux-2.6/drivers/pci/pci-driver.c	2005-06-17 18:44:52.000000000 +0200
@@ -393,7 +393,8 @@
 	drv->driver.bus = &pci_bus_type;
 	drv->driver.probe = pci_device_probe;
 	drv->driver.remove = pci_device_remove;
-	drv->driver.shutdown = pci_device_shutdown,
+	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);