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>
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 2ed099e..edaac27 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -3252,7 +3252,7 @@
*/
if ((scb->breakup) || (scb->sg_break)) {
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 */
scb->data_len = 0;
@@ -3261,20 +3261,22 @@
/* Spin forward to last dma chunk */
sg_dma_index = scb->breakup;
+ for (i = 0; i < scb->breakup; i++)
+ sg = sg_next(sg);
/* Take care of possible partial on last chunk */
ips_fill_scb_sg_single(ha,
- sg_dma_address(&sg[sg_dma_index]),
+ sg_dma_address(sg),
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);
- sg_dma_index++) {
+ sg_dma_index++, sg = sg_next(sg)) {
if (ips_fill_scb_sg_single
(ha,
- sg_dma_address(&sg[sg_dma_index]),
+ sg_dma_address(sg),
scb, ips_sg_index++,
- sg_dma_len(&sg[sg_dma_index])) < 0)
+ sg_dma_len(sg)) < 0)
break;
}