From: Mike Snitzer snitzer@kernel.org
stable inclusion from stable-v5.10.137 commit b7e2d64d673abdecae8b8f3f44ef37820e7e8f6c category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/md/dm.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 588e8b43efab..23e79dadafc6 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2985,6 +2985,11 @@ 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;