Commit f5ef2abc authored Apr 01, 2007 by Linus Torvalds

driver core: do not wait unnecessarily in driver_unregister()



Ingo reported that built-in drivers suffered bootup hangs with certain
driver unregistry sequences, due to sysfs breakage.

Do the minimal fix for v2.6.21: only wait if the driver is a module.

Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 755948cf

drivers/base/driver.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -183,6 +183,13 @@ int driver_register(struct device_driver * drv)
		void driver_unregister(struct device_driver * drv)
		{
		bus_remove_driver(drv);
		/*
		* If the driver is a module, we are probably in
		* the module unload path, and we want to wait
		* for everything to unload before we can actually
		* finish the unload.
		*/
		if (drv->owner)
		wait_for_completion(&drv->unloaded);
		}