This is a note to let you know that I've just added the patch titled dm: hold suspend_lock while suspending device during device deletion to the 3.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dm-hold-suspend_lock-while-suspending-device-during-device-deletion.patch and it can be found in the queue-3.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ab7c7bb6f4ab95dbca96fcfc4463cd69843e3e24 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka <mpatocka@xxxxxxxxxx> Date: Fri, 27 Feb 2015 14:04:27 -0500 Subject: dm: hold suspend_lock while suspending device during device deletion From: Mikulas Patocka <mpatocka@xxxxxxxxxx> commit ab7c7bb6f4ab95dbca96fcfc4463cd69843e3e24 upstream. __dm_destroy() must take the suspend_lock so that its presuspend and postsuspend calls do not race with an internal suspend. Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/dm.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2526,10 +2526,16 @@ static void __dm_destroy(struct mapped_d set_bit(DMF_FREEING, &md->flags); spin_unlock(&_minor_lock); + /* + * Take suspend_lock so that presuspend and postsuspend methods + * do not race with internal suspend. + */ + mutex_lock(&md->suspend_lock); if (!dm_suspended_md(md)) { dm_table_presuspend_targets(map); dm_table_postsuspend_targets(map); } + mutex_unlock(&md->suspend_lock); /* dm_put_live_table must be before msleep, otherwise deadlock is possible */ dm_put_live_table(md, srcu_idx); Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are queue-3.19/dm-snapshot-suspend-merging-snapshot-when-doing-exception-handover.patch queue-3.19/dm-hold-suspend_lock-while-suspending-device-during-device-deletion.patch queue-3.19/dm-snapshot-suspend-origin-when-doing-exception-handover.patch queue-3.19/dm-io-deal-with-wandering-queue-limits-when-handling-req_discard-and-req_write_same.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html