diff options
| -rw-r--r-- | drivers/md/raid1.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 21629ae46682..d0f4021bbc2e 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1284,6 +1284,7 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio) rdev_dec_pending(conf->mirrors[i].rdev, mddev); } else { /* fixup the bio for reuse */ + int size; sbio->bi_vcnt = vcnt; sbio->bi_size = r1_bio->sectors << 9; sbio->bi_idx = 0; @@ -1297,10 +1298,20 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio) sbio->bi_sector = r1_bio->sector + conf->mirrors[i].rdev->data_offset; sbio->bi_bdev = conf->mirrors[i].rdev->bdev; - for (j = 0; j < vcnt ; j++) - memcpy(page_address(sbio->bi_io_vec[j].bv_page), + size = sbio->bi_size; + for (j = 0; j < vcnt ; j++) { + struct bio_vec *bi; + bi = &sbio->bi_io_vec[j]; + bi->bv_offset = 0; + if (size > PAGE_SIZE) + bi->bv_len = PAGE_SIZE; + else + bi->bv_len = size; + size -= PAGE_SIZE; + memcpy(page_address(bi->bv_page), page_address(pbio->bi_io_vec[j].bv_page), PAGE_SIZE); + } } } |