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authorNeilBrown <neilb@suse.de>2012-05-31 15:39:11 +1000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-10 00:36:18 +0900
commit584b886aee3aff5fe7eb21e30f779eb5cd1daa36 (patch)
tree61945a4b446196fd4e21cb0c5fe9d125d26fd1ea
parentcf9ab4c62be7837c2f007cd51ab3604ca0620070 (diff)
md: raid1/raid10: fix problem with merge_bvec_fn
commit aba336bd1d46d6b0404b06f6915ed76150739057 upstream. The new merge_bvec_fn which calls the corresponding function in subsidiary devices requires that mddev->merge_check_needed be set if any child has a merge_bvec_fn. However were were only setting that when a device was hot-added, not when a device was present from the start. This bug was introduced in 3.4 so patch is suitable for 3.4.y kernels. However that are conflicts in raid10.c so a separate patch will be needed for 3.4.y. Reported-by: Sebastian Riemer <sebastian.riemer@profitbricks.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/md/raid1.c4
-rw-r--r--drivers/md/raid10.c5
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 15dd59b84e94..d7e957721456 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2548,6 +2548,7 @@ static struct r1conf *setup_conf(struct mddev *mddev)
err = -EINVAL;
spin_lock_init(&conf->device_lock);
rdev_for_each(rdev, mddev) {
+ struct request_queue *q;
int disk_idx = rdev->raid_disk;
if (disk_idx >= mddev->raid_disks
|| disk_idx < 0)
@@ -2560,6 +2561,9 @@ static struct r1conf *setup_conf(struct mddev *mddev)
if (disk->rdev)
goto abort;
disk->rdev = rdev;
+ q = bdev_get_queue(rdev->bdev);
+ if (q->merge_bvec_fn)
+ mddev->merge_check_needed = 1;
disk->head_position = 0;
}
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 3f91c2e1dfe7..d037adb295ac 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3311,7 +3311,7 @@ static int run(struct mddev *mddev)
(conf->raid_disks / conf->near_copies));
rdev_for_each(rdev, mddev) {
-
+ struct request_queue *q;
disk_idx = rdev->raid_disk;
if (disk_idx >= conf->raid_disks
|| disk_idx < 0)
@@ -3327,6 +3327,9 @@ static int run(struct mddev *mddev)
goto out_free_conf;
disk->rdev = rdev;
}
+ q = bdev_get_queue(rdev->bdev);
+ if (q->merge_bvec_fn)
+ mddev->merge_check_needed = 1;
disk_stack_limits(mddev->gendisk, rdev->bdev,
rdev->data_offset << 9);