diff options
| author | Jonathan Brassow <jbrassow@redhat.com> | 2012-10-31 11:42:30 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-10-31 11:42:30 +1100 |
| commit | ed30be077e705e0dff53bfc51d23feb8aeeab78f (patch) | |
| tree | bd57d2636bbe5d757549fc6dde8d2b93643bb4f2 /drivers/md | |
| parent | 02b898f2f04e418094f0093a3ad0b415bcdbe8eb (diff) | |
| download | lwn-ed30be077e705e0dff53bfc51d23feb8aeeab78f.tar.gz lwn-ed30be077e705e0dff53bfc51d23feb8aeeab78f.zip | |
MD RAID10: Fix oops when creating RAID10 arrays via dm-raid.c
Commit 2863b9eb didn't take into account the changes to add TRIM support to
RAID10 (commit 532a2a3fb). That is, when using dm-raid.c to create the
RAID10 arrays, there is no mddev->gendisk or mddev->queue. The code added
to support TRIM simply assumes that mddev->queue is available without
checking. The result is an oops any time dm-raid.c attempts to create a
RAID10 device.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid10.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 906ccbd0f7dc..d1295aff4173 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1783,7 +1783,7 @@ static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev) clear_bit(Unmerged, &rdev->flags); } md_integrity_add_rdev(rdev, mddev); - if (blk_queue_discard(bdev_get_queue(rdev->bdev))) + if (mddev->queue && blk_queue_discard(bdev_get_queue(rdev->bdev))) queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); print_conf(conf); @@ -3613,11 +3613,14 @@ static int run(struct mddev *mddev) discard_supported = true; } - if (discard_supported) - queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); - else - queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); - + if (mddev->queue) { + if (discard_supported) + queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, + mddev->queue); + else + queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, + mddev->queue); + } /* need to check that every block has at least one working mirror */ if (!enough(conf, -1)) { printk(KERN_ERR "md/raid10:%s: not enough operational mirrors.\n", |