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

This rewrites tw_transfer_internal with scsi_sg_copy_from/to_buffer.

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>

1 files changed, 2 insertions, 10 deletions

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index d09532162217..a2fc06022e10 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -1463,18 +1463,10 @@ static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
                                  void *data, unsigned int len)
 {
         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
-        void *buf;
-        unsigned int transfer_len;
-        unsigned long flags = 0;
-        struct scatterlist *sg = scsi_sglist(cmd);
+        unsigned long flags;
 
         local_irq_save(flags);
-        buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
-        transfer_len = min(sg->length, len);
-
-        memcpy(buf, data, transfer_len);
-
-        kunmap_atomic(buf - sg->offset, KM_IRQ0);
+        scsi_sg_copy_from_buffer(cmd, data, len);
         local_irq_restore(flags);
 }