MD: Add del_timer_sync to mddev_suspend (fix nasty panic)
commitf4f388bce9ef18d7ab4e234495d52cc7e716ab3b
authorJonathan Brassow <jbrassow@redhat.com>
Wed, 16 May 2012 09:06:14 +0000 (16 04:06 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 21 May 2012 16:40:03 +0000 (21 09:40 -0700)
treea8035610dadbe1d72c143ea7a43170ca73e38049
parent04a4aeb4052eec420eb1a50ab1cba1f359223e37
MD: Add del_timer_sync to mddev_suspend (fix nasty panic)

commit 0d9f4f135eb6dea06bdcb7065b1e4ff78274a5e9 upstream.

Use del_timer_sync to remove timer before mddev_suspend finishes.

We don't want a timer going off after an mddev_suspend is called.  This is
especially true with device-mapper, since it can call the destructor function
immediately following a suspend.  This results in the removal (kfree) of the
structures upon which the timer depends - resulting in a very ugly panic.
Therefore, we add a del_timer_sync to mddev_suspend to prevent this.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/md/md.c