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Commit 90be7f15 authored by Bart Van Assche's avatar Bart Van Assche Committed by Greg Kroah-Hartman
Browse files

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: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b1d528d0

drivers/md/dm.c

+5 −0
Original line number Diff line number Diff line
@@ -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);