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Prevent bus_remove_device() from crashing if dev->knode_bus has not been initialized before it's called. This can happen if the device_add() ended up breaking out early due to an error, for example. Signed-off-by: Rafael J. Wysocki <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>