[SCSI] ips: use sg buffer copy helper funcitons
This rewrites ips_scmd_buf_write/read with scsi_sg_copy_from/to_buffer
respectively.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Salyzyn, Mark <Mark_Salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 6264036..cc4f44f 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -3502,28 +3502,11 @@
static void
ips_scmd_buf_write(struct scsi_cmnd *scmd, void *data, unsigned int count)
{
- int i;
- unsigned int min_cnt, xfer_cnt;
- char *cdata = (char *) data;
- unsigned char *buffer;
- unsigned long flags;
- struct scatterlist *sg = scsi_sglist(scmd);
+ unsigned long flags;
- for (i = 0, xfer_cnt = 0;
- (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), KM_IRQ0) + sg->offset;
- memcpy(buffer, &cdata[xfer_cnt], min_cnt);
- kunmap_atomic(buffer - sg->offset, KM_IRQ0);
- local_irq_restore(flags);
-
- xfer_cnt += min_cnt;
- }
+ local_irq_save(flags);
+ scsi_sg_copy_from_buffer(scmd, data, count);
+ local_irq_restore(flags);
}
/****************************************************************************/
@@ -3536,28 +3519,11 @@
static void
ips_scmd_buf_read(struct scsi_cmnd *scmd, void *data, unsigned int count)
{
- int i;
- unsigned int min_cnt, xfer_cnt;
- char *cdata = (char *) data;
- unsigned char *buffer;
- unsigned long flags;
- struct scatterlist *sg = scsi_sglist(scmd);
+ unsigned long flags;
- for (i = 0, xfer_cnt = 0;
- (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), KM_IRQ0) + sg->offset;
- memcpy(&cdata[xfer_cnt], buffer, min_cnt);
- kunmap_atomic(buffer - sg->offset, KM_IRQ0);
- local_irq_restore(flags);
-
- xfer_cnt += min_cnt;
- }
+ local_irq_save(flags);
+ scsi_sg_copy_to_buffer(scmd, data, count);
+ local_irq_restore(flags);
}
/****************************************************************************/