UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ips: sg chaining support 

ips properly uses scsi_for_each_sg for the normal I/O path, however,
the breakup path doesn't.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2007-07-16 15:24:14 +02:00 committed by Jens Axboe
parent 55c16a7004
commit e0eaf88828
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/scsi/ips.c
View File

@ -3252,7 +3252,7 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb)
*/ */
if ((scb->breakup) || (scb->sg_break)) { if ((scb->breakup) || (scb->sg_break)) {
struct scatterlist *sg; struct scatterlist *sg;
int sg_dma_index, ips_sg_index = 0; int i, sg_dma_index, ips_sg_index = 0;
/* we had a data breakup */ /* we had a data breakup */
scb->data_len = 0; scb->data_len = 0;
@ -3261,20 +3261,22 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb)
/* Spin forward to last dma chunk */ /* Spin forward to last dma chunk */
sg_dma_index = scb->breakup; sg_dma_index = scb->breakup;
for (i = 0; i < scb->breakup; i++)
sg = sg_next(sg);
/* Take care of possible partial on last chunk */ /* Take care of possible partial on last chunk */
ips_fill_scb_sg_single(ha, ips_fill_scb_sg_single(ha,
sg_dma_address(&sg[sg_dma_index]), sg_dma_address(sg),
scb, ips_sg_index++, scb, ips_sg_index++,
sg_dma_len(&sg[sg_dma_index])); sg_dma_len(sg));
for (; sg_dma_index < scsi_sg_count(scb->scsi_cmd); for (; sg_dma_index < scsi_sg_count(scb->scsi_cmd);
sg_dma_index++) { sg_dma_index++, sg = sg_next(sg)) {
if (ips_fill_scb_sg_single if (ips_fill_scb_sg_single
(ha, (ha,
sg_dma_address(&sg[sg_dma_index]), sg_dma_address(sg),
scb, ips_sg_index++, scb, ips_sg_index++,
sg_dma_len(&sg[sg_dma_index])) < 0) sg_dma_len(sg)) < 0)
break; break;
} }