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[SCSI] 3w-9xxx: use sg buffer copy helper functions 

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Adam Radford <linuxraid@amcc.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
FUJITA Tomonori 2008-03-09 13:44:37 +09:00 committed by James Bottomley
parent e943752ecf
commit 035f5e0651
1 changed files with 9 additions and 12 deletions
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21
drivers/scsi/3w-9xxx.c
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@ -1838,12 +1838,11 @@ static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
if (scsi_sg_count(srb)) {
if ((scsi_sg_count(srb) == 1) &&
(scsi_bufflen(srb) < TW_MIN_SGL_LENGTH)) {
if (srb->sc_data_direction == DMA_TO_DEVICE || srb->sc_data_direction == DMA_BIDIRECTIONAL) {
struct scatterlist *sg = scsi_sglist(srb);
char *buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
memcpy(tw_dev->generic_buffer_virt[request_id], buf, sg->length);
kunmap_atomic(buf - sg->offset, KM_IRQ0);
}
if (srb->sc_data_direction == DMA_TO_DEVICE ||
srb->sc_data_direction == DMA_BIDIRECTIONAL)
scsi_sg_copy_to_buffer(srb,
tw_dev->generic_buffer_virt[request_id],
TW_SECTOR_SIZE);
command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
} else {
@ -1915,13 +1914,11 @@ static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int re
(cmd->sc_data_direction == DMA_FROM_DEVICE ||
cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
if (scsi_sg_count(cmd) == 1) {
struct scatterlist *sg = scsi_sglist(tw_dev->srb[request_id]);
char *buf;
unsigned long flags = 0;
unsigned long flags;
void *buf = tw_dev->generic_buffer_virt[request_id];
local_irq_save(flags);
buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
memcpy(buf, tw_dev->generic_buffer_virt[request_id], sg->length);
kunmap_atomic(buf - sg->offset, KM_IRQ0);
scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
local_irq_restore(flags);
}
}