diff options
| author | NeilBrown <neilb@suse.de> | 2012-05-31 15:39:11 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-10 00:36:18 +0900 |
| commit | 584b886aee3aff5fe7eb21e30f779eb5cd1daa36 (patch) | |
| tree | 61945a4b446196fd4e21cb0c5fe9d125d26fd1ea /drivers/md | |
| parent | cf9ab4c62be7837c2f007cd51ab3604ca0620070 (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>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 4 | ||||
| -rw-r--r-- | drivers/md/raid10.c | 5 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 15dd59b84e9..d7e95772145 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 3f91c2e1dfe..d037adb295a 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); |