dm: don't lock fs when the map is NULL during suspend or resume

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As described in commit 38d11da522 ("dm: don't lock fs when the map is
NULL in process of resume"), a deadlock may be triggered between
do_resume() and do_mount().

This commit preserves the fix from commit 38d11da522 but moves it to
where it also serves to fix a similar deadlock between do_suspend()
and do_mount().  It does so, if the active map is NULL, by clearing
DM_SUSPEND_LOCKFS_FLAG in dm_suspend() which is called by both
do_suspend() and do_resume().

Fixes: 38d11da522 ("dm: don't lock fs when the map is NULL in process of resume")
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

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This commit is contained in:

Li Lingfeng 2023-06-01 14:14:23 +08:00 • committed by Mike Snitzer

parent f1fcbaa18b

commit 2760904d89

2 changed files with 5 additions and 4 deletions

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5

drivers/md/dm-ioctl.c

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4

drivers/md/dm.c

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