Commit 7184ef8b authored by Shaohua Li's avatar Shaohua Li
Browse files

MD: fix sleep in atomic 



bioset_free() will take a mutex, so can't get called with spinlock hold.

Fix: 5a85071c(md: use a separate bio_set for synchronous IO.)
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent 7f053a6a

drivers/md/md.c

+8 −4
Original line number Diff line number Diff line
@@ -475,6 +475,8 @@ static void mddev_delayed_delete(struct work_struct *ws); 


static void mddev_put(struct mddev *mddev)

{

	struct bio_set *bs = NULL, *sync_bs = NULL;



	if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock))

		return;

	if (!mddev->raid_disks && list_empty(&mddev->disks) &&
@@ -482,10 +484,8 @@ static void mddev_put(struct mddev *mddev) 
		/* Array is not configured at all, and not held active,

		 * so destroy it */

		list_del_init(&mddev->all_mddevs);

		if (mddev->bio_set)

			bioset_free(mddev->bio_set);

		if (mddev->sync_set)

			bioset_free(mddev->sync_set);

		bs = mddev->bio_set;

		sync_bs = mddev->sync_set;

		mddev->bio_set = NULL;

		mddev->sync_set = NULL;

		if (mddev->gendisk) {
@@ -500,6 +500,10 @@ static void mddev_put(struct mddev *mddev) 
			kfree(mddev);

	}

	spin_unlock(&all_mddevs_lock);

	if (bs)

		bioset_free(bs);

	if (sync_bs)

		bioset_free(sync_bs);

}



static void md_safemode_timeout(unsigned long data);