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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-03-04 13:17:11 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@carl.home.kernel.dk> | 2008-03-04 13:17:11 +0300 |
| commit | 7a85f8896f4b4a4a0249563b92af9e3161a6b467 (patch) | |
| tree | 616c62e3c96237e874fc0f47133fbca2160913b5 /block/bsg.c | |
| parent | 89b6e743788516491846724d7ef89bcac7ac9c99 (diff) | |
| download | linux-7a85f8896f4b4a4a0249563b92af9e3161a6b467.tar.xz | |
block: restore the meaning of rq->data_len to the true data length
The meaning of rq->data_len was changed to the length of an allocated
buffer from the true data length. It breaks SG_IO friends and
bsg. This patch restores the meaning of rq->data_len to the true data
length and adds rq->extra_len to store an extended length (due to
drain buffer and padding).
This patch also removes the code to update bio in blk_rq_map_user
introduced by the commit 40b01b9bbdf51ae543a04744283bf2d56c4a6afa.
The commit adjusts bio according to memory alignment
(queue_dma_alignment). However, memory alignment is NOT padding
alignment. This adjustment also breaks SG_IO friends and bsg. Padding
alignment needs to be fixed in a proper way (by a separate patch).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
Diffstat (limited to 'block/bsg.c')
| -rw-r--r-- | block/bsg.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/bsg.c b/block/bsg.c index 7f3c09549e4b..8917c5174dc2 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -437,14 +437,14 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr, } if (rq->next_rq) { - hdr->dout_resid = rq->raw_data_len; - hdr->din_resid = rq->next_rq->raw_data_len; + hdr->dout_resid = rq->data_len; + hdr->din_resid = rq->next_rq->data_len; blk_rq_unmap_user(bidi_bio); blk_put_request(rq->next_rq); } else if (rq_data_dir(rq) == READ) - hdr->din_resid = rq->raw_data_len; + hdr->din_resid = rq->data_len; else - hdr->dout_resid = rq->raw_data_len; + hdr->dout_resid = rq->data_len; /* * If the request generated a negative error number, return it |