From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Jens Axboe" , "Lars Ellenberg" , "Philipp Reisner" Date: Tue, 17 Feb 2015 01:46:53 +0000 Message-ID: Subject: [PATCH 3.2 014/152] drbd: merge_bvec_fn: properly remap bvm->bi_bdev In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2.67-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Lars Ellenberg commit 3b9d35d744bb5139f9fed57f38c019bb8c7d351c upstream. This was not noticed for many years. Affects operation if md raid is used a backing device for DRBD. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe [bwh: Backported to 3.2: s/device/mdev/] Signed-off-by: Ben Hutchings --- 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 @@ -1184,6 +1184,7 @@ 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); }