Commit f5ef2abc authored by Linus Torvalds's avatar 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: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 755948cf
...@@ -183,6 +183,13 @@ int driver_register(struct device_driver * drv) ...@@ -183,6 +183,13 @@ int driver_register(struct device_driver * drv)
void driver_unregister(struct device_driver * drv) void driver_unregister(struct device_driver * drv)
{ {
bus_remove_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); wait_for_completion(&drv->unloaded);
} }
......
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