From 90be7f1538fb0ab22582f018e42115f18315eb8d Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 31 Aug 2016 15:17:49 -0700 Subject: [PATCH] dm: mark request_queue dead before destroying the DM device commit 3b785fbcf81c3533772c52b717f77293099498d3 upstream. This avoids that new requests are queued while __dm_destroy() is in progress. Signed-off-by: Bart Van Assche Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index a42729ebf272..0efc3d60e6b7 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2869,6 +2869,7 @@ EXPORT_SYMBOL_GPL(dm_device_name); static void __dm_destroy(struct mapped_device *md, bool wait) { + struct request_queue *q = dm_get_md_queue(md); struct dm_table *map; int srcu_idx; @@ -2879,6 +2880,10 @@ static void __dm_destroy(struct mapped_device *md, bool wait) set_bit(DMF_FREEING, &md->flags); spin_unlock(&_minor_lock); + spin_lock_irq(q->queue_lock); + queue_flag_set(QUEUE_FLAG_DYING, q); + spin_unlock_irq(q->queue_lock); + if (dm_request_based(md) && md->kworker_task) flush_kthread_worker(&md->kworker); -- 2.34.1