From: Shaohua Li <shli@fb.com>
Date: Thu, 21 Sep 2017 17:29:22 +0000 (-0700)
Subject: dm-raid: fix a race condition in request handling
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c4d6a1b8e8ea79c439a4871cba540443c9eb13b9;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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: cc27b0c78c79(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: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
---

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 5bfe285ea9d1..1ac58c5651b7 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3238,7 +3238,7 @@ static int raid_map(struct dm_target *ti, struct bio *bio)
 	if (unlikely(bio_end_sector(bio) > mddev->array_sectors))
 		return DM_MAPIO_REQUEUE;
 
-	mddev->pers->make_request(mddev, bio);
+	md_handle_request(mddev, bio);
 
 	return DM_MAPIO_SUBMITTED;
 }