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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2008-03-04 11:17:11 +0100
committerJens Axboe <axboe@carl.home.kernel.dk>2008-03-04 11:17:11 +0100
commit7a85f8896f4b4a4a0249563b92af9e3161a6b467 (patch)
tree616c62e3c96237e874fc0f47133fbca2160913b5 /block/scsi_ioctl.c
parent89b6e743788516491846724d7ef89bcac7ac9c99 (diff)
downloadlinux-7a85f8896f4b4a4a0249563b92af9e3161a6b467.tar.gz
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/scsi_ioctl.c')
-rw-r--r--block/scsi_ioctl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index e993cac4911..a2c3a936ebf 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -266,7 +266,7 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
- hdr->resid = rq->raw_data_len;
+ hdr->resid = rq->data_len;
hdr->sb_len_wr = 0;
if (rq->sense_len && hdr->sbp) {
@@ -528,8 +528,8 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
rq = blk_get_request(q, WRITE, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->data = NULL;
- rq->raw_data_len = 0;
rq->data_len = 0;
+ rq->extra_len = 0;
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd[0] = cmd;