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| author | majianpeng <majianpeng@gmail.com> | 2012-06-12 08:31:10 +0800 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-07-03 12:09:57 +1000 |
| commit | 6c0544e255dd6582a9899572e120fb55d9f672a4 (patch) | |
| tree | f77e75815a54c6af1068dceb6ada1eb51d8501ce | |
| parent | 5cfb22a1f83e4f04c0a4df89b60053a077222e2b (diff) | |
| download | linux-6c0544e255dd6582a9899572e120fb55d9f672a4.tar.gz linux-6c0544e255dd6582a9899572e120fb55d9f672a4.tar.bz2 linux-6c0544e255dd6582a9899572e120fb55d9f672a4.zip | |
md/raid5: Do not add data_offset before call to is_badblock
In chunk_aligned_read() we are adding data_offset before calling
is_badblock. But is_badblock also adds data_offset, so that is bad.
So move the addition of data_offset to after the call to
is_badblock.
This bug was introduced by commit 31c176ecdf3563140e639
md/raid5: avoid reading from known bad blocks.
which first appeared in 3.0. So that patch is suitable for any
-stable kernel from 3.0.y onwards. However it will need minor
revision for most of those (as the comment didn't appear until
recently).
Cc: stable@vger.kernel.org
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/raid5.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 95fcbbf3d6c9..9567a9c83a1f 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3881,8 +3881,6 @@ static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio) raid_bio->bi_next = (void*)rdev; align_bi->bi_bdev = rdev->bdev; align_bi->bi_flags &= ~(1 << BIO_SEG_VALID); - /* No reshape active, so we can trust rdev->data_offset */ - align_bi->bi_sector += rdev->data_offset; if (!bio_fits_rdev(align_bi) || is_badblock(rdev, align_bi->bi_sector, align_bi->bi_size>>9, @@ -3893,6 +3891,9 @@ static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio) return 0; } + /* No reshape active, so we can trust rdev->data_offset */ + align_bi->bi_sector += rdev->data_offset; + spin_lock_irq(&conf->device_lock); wait_event_lock_irq(conf->wait_for_stripe, conf->quiesce == 0, |