[PATCH] driver core: safely unbind drivers for devices not on a bus

This patch (as667) changes the __device_release_driver() routine to
prevent it from crashing when it runs across a device not on any bus.
This seems logical, inasmuch as the corresponding bus_add_device()
routine has an explicit check allowing it to accept such devices.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 730a9ce0a14a..889c71111239 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -209,7 +209,7 @@ static void __device_release_driver(struct device * dev)
                 sysfs_remove_link(&dev->kobj, "driver");
                 klist_remove(&dev->knode_driver);
 
-                if (dev->bus->remove)
+                if (dev->bus && dev->bus->remove)
                         dev->bus->remove(dev);
                 else if (drv->remove)
                         drv->remove(dev);