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| author | majianpeng <majianpeng@gmail.com> | 2012-04-12 16:04:47 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-04-12 16:04:47 +1000 |
| commit | f4380a915823dbed0bf8e3cf502ebcf2b7c7f833 (patch) | |
| tree | 1326179e1f715f33495066b2fe4b99acf1bbdd96 /drivers/md/raid1.c | |
| parent | 9e41dd35b39c2cf40767332b8f914d7afe25cc40 (diff) | |
| download | linux-f4380a915823dbed0bf8e3cf502ebcf2b7c7f833.tar.bz2 | |
md/raid1,raid10: Fix calculation of 'vcnt' when processing error recovery.
If r1bio->sectors % 8 != 0,then the memcmp and a later
memcpy will omit the last bio_vec.
This is suitable for any stable kernel since 3.1 when bad-block
management was introduced.
Cc: stable@vger.kernel.org
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index d35e4c991e38..15dd59b84e94 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1712,6 +1712,7 @@ static int process_checks(struct r1bio *r1_bio) struct r1conf *conf = mddev->private; int primary; int i; + int vcnt; for (primary = 0; primary < conf->raid_disks * 2; primary++) if (r1_bio->bios[primary]->bi_end_io == end_sync_read && @@ -1721,9 +1722,9 @@ static int process_checks(struct r1bio *r1_bio) break; } r1_bio->read_disk = primary; + vcnt = (r1_bio->sectors + PAGE_SIZE / 512 - 1) >> (PAGE_SHIFT - 9); for (i = 0; i < conf->raid_disks * 2; i++) { int j; - int vcnt = r1_bio->sectors >> (PAGE_SHIFT- 9); struct bio *pbio = r1_bio->bios[primary]; struct bio *sbio = r1_bio->bios[i]; int size; |