This is a note to let you know that I've just added the patch titled
drbd: merge_bvec_fn: properly remap bvm->bi_bdev
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drbd-merge_bvec_fn-properly-remap-bvm-bi_bdev.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3b9d35d744bb5139f9fed57f38c019bb8c7d351c Mon Sep 17 00:00:00 2001
From: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
Date: Mon, 10 Nov 2014 17:21:13 +0100
Subject: drbd: merge_bvec_fn: properly remap bvm->bi_bdev
From: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
commit 3b9d35d744bb5139f9fed57f38c019bb8c7d351c upstream.
This was not noticed for many years. Affects operation if
md raid is used a backing device for DRBD.
CC: stable@xxxxxxxxxx # v3.2+
Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
Signed-off-by: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/drbd/drbd_req.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1310,6 +1310,7 @@ int drbd_merge_bvec(struct request_queue
struct request_queue * const b =
mdev->ldev->backing_bdev->bd_disk->queue;
if (b->merge_bvec_fn) {
+ bvm->bi_bdev = mdev->ldev->backing_bdev;
backing_limit = b->merge_bvec_fn(b, bvm, bvec);
limit = min(limit, backing_limit);
}
Patches currently in stable-queue which might be from lars.ellenberg@xxxxxxxxxx are
queue-3.14/drbd-merge_bvec_fn-properly-remap-bvm-bi_bdev.patch
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