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Commit c4d6a1b8 authored by Shaohua Li's avatar Shaohua Li
Browse files

dm-raid: fix a race condition in request handling 



raid_map calls pers->make_request, which missed the suspend check. Fix it with
the new md_handle_request API.

Fix: cc27b0c7(md: fix deadlock between mddev_suspend() and md_write_start())
Cc: Heinz Mauelshagen <heinzm@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent 79bf31a3

drivers/md/dm-raid.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -3238,7 +3238,7 @@ static int raid_map(struct dm_target *ti, struct bio *bio) 
	if (unlikely(bio_end_sector(bio) > mddev->array_sectors))

	if (unlikely(bio_end_sector(bio) > mddev->array_sectors))

		return DM_MAPIO_REQUEUE;

		return DM_MAPIO_REQUEUE;





	mddev->pers->make_request(mddev, bio);

	md_handle_request(mddev, bio);





	return DM_MAPIO_SUBMITTED;

	return DM_MAPIO_SUBMITTED;

}

}