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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2008-03-09 13:44:33 +0900
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-04-07 12:15:46 -0500
commit6690bae7e0279451ee92580bf1c5d39a76e3687e (patch)
treec32db080167c4ff68aff4d81fb3635baf1a87357 /drivers/scsi/ips.c
parent1a7a2e1a77f29179f997ca5e873c50ae2fb7fcc1 (diff)
downloadlinux-6690bae7e0279451ee92580bf1c5d39a76e3687e.tar.bz2
[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>
Diffstat (limited to 'drivers/scsi/ips.c')
-rw-r--r--drivers/scsi/ips.c50
1 files changed, 8 insertions, 42 deletions
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 62640366845a..cc4f44fcabb6 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -3502,28 +3502,11 @@ ips_send_wait(ips_ha_t * ha, ips_scb_t * scb, int timeout, int intr)
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);
-
- 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);
+ unsigned long 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 @@ ips_scmd_buf_write(struct scsi_cmnd *scmd, void *data, unsigned int count)
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);
-
- 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);
+ unsigned long flags;
- xfer_cnt += min_cnt;
- }
+ local_irq_save(flags);
+ scsi_sg_copy_to_buffer(scmd, data, count);
+ local_irq_restore(flags);
}
/****************************************************************************/