This is a note to let you know that I've just added the patch titled dm: return early from dm_pr_call() if DM device is suspended to the 4.19-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-return-early-from-dm_pr_call-if-dm-device-is-susp.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit ebd24291ddb61ef57222a01bf9e4cabcb2819538 Author: Mike Snitzer <snitzer@xxxxxxxxxx> Date: Fri Jul 22 15:31:23 2022 -0400 dm: return early from dm_pr_call() if DM device is suspended [ Upstream commit e120a5f1e78fab6223544e425015f393d90d6f0d ] Otherwise PR ops may be issued while the broader DM device is being reconfigured, etc. Fixes: 9c72bad1f31a ("dm: call PR reserve/unreserve on each underlying device") Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d2ee97cd7d14..324d1dd58e2b 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -3122,6 +3122,11 @@ static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn, goto out; ti = dm_table_get_target(table, 0); + if (dm_suspended_md(md)) { + ret = -EAGAIN; + goto out; + } + ret = -EINVAL; if (!ti->type->iterate_devices) goto out;