In __btrfs_lookup_bio_sums() we set the file offset value at the beginning of every iteration of the while loop. This is incorrect since the blocks mapped by the current bvec->bv_page might not yet have been completely processed.
This commit fixes the issue by setting the file offset value when we move to the next bvec of the bio. Signed-off-by: Chandan Rajendra <chan...@linux.vnet.ibm.com> --- fs/btrfs/file-item.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 62a81ee..fb6a7e8 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -222,11 +222,11 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root, disk_bytenr = (u64)bio->bi_iter.bi_sector << 9; if (dio) offset = logical_offset; + else + offset = page_offset(bvec->bv_page) + bvec->bv_offset; page_bytes_left = bvec->bv_len; while (bio_index < bio->bi_vcnt) { - if (!dio) - offset = page_offset(bvec->bv_page) + bvec->bv_offset; count = btrfs_find_ordered_sum(inode, offset, disk_bytenr, (u32 *)csum, nblocks); if (count) @@ -301,6 +301,9 @@ found: goto done; } bvec++; + if (!dio) + offset = page_offset(bvec->bv_page) + + bvec->bv_offset; page_bytes_left = bvec->bv_len; } -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html