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List:       git-commits-head
Subject:    dm-raid: fix a race condition in request handling
From:       "Linux Kernel Mailing List" <linux-kernel () vger ! kernel ! org>
Date:       2017-09-29 20:02:03
Message-ID: 20170929200203.798F521B60 () pdx-korg-gitolite-1 ! ci ! codeaurora ! org
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Web:        https://git.kernel.org/torvalds/c/c4d6a1b8e8ea79c439a4871cba540443c9eb13b9
Commit:     c4d6a1b8e8ea79c439a4871cba540443c9eb13b9
Parent:     79bf31a3b2a7ca467cfec8ff97d359a77065d01f
Refname:    refs/heads/master
Author:     Shaohua Li <shli@fb.com>
AuthorDate: Thu Sep 21 10:29:22 2017 -0700
Committer:  Shaohua Li <shli@fb.com>
CommitDate: Wed Sep 27 20:08:29 2017 -0700

    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>
---
 drivers/md/dm-raid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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;
 }
--
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