From: Mike Snitzer snitzer@kernel.org
[ 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@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/dm.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index f01d33bc3613..e0e28a3203f8 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2955,6 +2955,11 @@ 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;