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dm: return early from dm_pr_call() if DM device is suspended

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[ Upstream commit e120a5f1e7 ]

Otherwise PR ops may be issued while the broader DM device is being
reconfigured, etc.

Fixes: 9c72bad1f3 ("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>
This commit is contained in:
Mike Snitzer 2022-07-22 15:31:23 -04:00 • committed by Greg Kroah-Hartman
commit b7e2d64d67
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm.c
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@ -3003,6 +3003,11 @@ 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;