[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>

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index d095321..a2fc060 100644 (file)
--- 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);
 }