Here is another ips patch, but not a bug fix.
=
From: FUJITA Tomonori <[EMAIL PROTECTED]>
Subject: [PATCH] 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 <[EMAIL PROTECTED]>
Cc: Salyzyn, Mark <[EMAIL PROTECTED]>
Cc: James Bottomley <[EMAIL PROTECTED]>
---
drivers/scsi/ips.c | 18 ++++++++++--------
1 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 7ed568f..e5467a4 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;
--
1.5.3.7
-
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