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authorFUJITA Tomonori <tomof@acm.org>2008-02-19 18:41:30 +0900
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-04-07 12:15:36 -0500
commit7e23ea488488400127a2da19c0d89f1723117504 (patch)
tree7af7e6ec222b8bd1c1f01555a23e7af6a8a7a95e /drivers/scsi/ips.c
parentcff2680643f9288a1cd4e27c241e1da51f476d66 (diff)
downloadlinux-7e23ea488488400127a2da19c0d89f1723117504.tar.bz2
[SCSI] ips: sg chaining support to the path to non I/O commands
I overlooked ips_scmd_buf_write and ips_scmd_buf_read when I converted ips to use the data buffer accessors. ips is unlikely to use sg chaining (especially in this path) since a) this path is used only for non I/O commands (with little data transfer), b) ips's sg_tablesize is set to just 17. Thanks to Tim Pepper for testing this patch. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Mark Salyzyn <Mark_Salyzyn@adaptec.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/ips.c')
-rw-r--r--drivers/scsi/ips.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 7ed568f180ae..e5467a4c225b 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -3510,15 +3510,16 @@ ips_scmd_buf_write(struct scsi_cmnd *scmd, void *data, unsigned int count)
struct scatterlist *sg = scsi_sglist(scmd);
for (i = 0, xfer_cnt = 0;
- (i < scsi_sg_count(scmd)) && (xfer_cnt < count); i++) {
- min_cnt = min(count - xfer_cnt, sg[i].length);
+ (i < scsi_sg_count(scmd)) && (xfer_cnt < count);
+ i++, sg = sg_next(sg)) {
+ min_cnt = min(count - xfer_cnt, sg->length);
/* kmap_atomic() ensures addressability of the data buffer.*/
/* local_irq_save() protects the KM_IRQ0 address slot. */
local_irq_save(flags);
- buffer = kmap_atomic(sg_page(&sg[i]), KM_IRQ0) + sg[i].offset;
+ buffer = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
memcpy(buffer, &cdata[xfer_cnt], min_cnt);
- kunmap_atomic(buffer - sg[i].offset, KM_IRQ0);
+ kunmap_atomic(buffer - sg->offset, KM_IRQ0);
local_irq_restore(flags);
xfer_cnt += min_cnt;
@@ -3543,15 +3544,16 @@ ips_scmd_buf_read(struct scsi_cmnd *scmd, void *data, unsigned int count)
struct scatterlist *sg = scsi_sglist(scmd);
for (i = 0, xfer_cnt = 0;
- (i < scsi_sg_count(scmd)) && (xfer_cnt < count); i++) {
- min_cnt = min(count - xfer_cnt, sg[i].length);
+ (i < scsi_sg_count(scmd)) && (xfer_cnt < count);
+ i++, sg = sg_next(sg)) {
+ min_cnt = min(count - xfer_cnt, sg->length);
/* kmap_atomic() ensures addressability of the data buffer.*/
/* local_irq_save() protects the KM_IRQ0 address slot. */
local_irq_save(flags);
- buffer = kmap_atomic(sg_page(&sg[i]), KM_IRQ0) + sg[i].offset;
+ buffer = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
memcpy(&cdata[xfer_cnt], buffer, min_cnt);
- kunmap_atomic(buffer - sg[i].offset, KM_IRQ0);
+ kunmap_atomic(buffer - sg->offset, KM_IRQ0);
local_irq_restore(flags);
xfer_cnt += min_cnt;