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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 /drivers/ata | |
| 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 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 7b1f1ee8131d..fe47922dd69e 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2538,7 +2538,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) } qc->tf.command = ATA_CMD_PACKET; - qc->nbytes = scsi_bufflen(scmd); + qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len; /* check whether ATAPI DMA is safe */ if (!using_pio && ata_check_atapi_dma(qc)) @@ -2549,7 +2549,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) * want to set it properly, and for DMA where it is * effectively meaningless. */ - nbytes = min(scmd->request->raw_data_len, (unsigned int)63 * 1024); + nbytes = min(scmd->request->data_len, (unsigned int)63 * 1024); /* Most ATAPI devices which honor transfer chunk size don't * behave according to the spec when odd chunk size which @@ -2875,7 +2875,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) * TODO: find out if we need to do more here to * cover scatter/gather case. */ - qc->nbytes = scsi_bufflen(scmd); + qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len; /* request result TF and be quiet about device error */ qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; |