tree 02d3791a335d20f6515b26aa8657b47120105796
parent a93cb29acaa8f75618c3f202d1cf43c231984644
author Takashi Iwai <tiwai@suse.de> 1368187451 +0200
committer Al Viro <viro@zeniv.linux.org.uk> 1370027793 -0400

vfs: Fix invalid ida_remove() call

When the group id of a shared mount is not allocated, the umount still
tries to call mnt_release_group_id(), which eventually hits a kernel
warning at ida_remove() spewing a message like:
  ida_remove called for id=0 which is not allocated.

This patch fixes the bug simply checking the group id in the caller.

Reported-by: Cristian Rodríguez <crrodriguez@opensuse.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>