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dm: hold suspend_lock while suspending device during device deletion
__dm_destroy() must take the suspend_lock so that its presuspend and postsuspend calls do not race with an internal suspend. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
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@ -2638,10 +2638,16 @@ static void __dm_destroy(struct mapped_device *md, bool wait)
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if (dm_request_based(md))
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flush_kthread_worker(&md->kworker);
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/*
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* Take suspend_lock so that presuspend and postsuspend methods
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* do not race with internal suspend.
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*/
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mutex_lock(&md->suspend_lock);
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if (!dm_suspended_md(md)) {
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dm_table_presuspend_targets(map);
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dm_table_postsuspend_targets(map);
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}
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mutex_unlock(&md->suspend_lock);
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/* dm_put_live_table must be before msleep, otherwise deadlock is possible */
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dm_put_live_table(md, srcu_idx);
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