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[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>
This commit is contained in:
FUJITA Tomonori 2008-03-09 13:44:36 +09:00 committed by James Bottomley
parent 31fe47d437
commit e943752ecf
1 changed files with 2 additions and 10 deletions
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12
drivers/scsi/3w-xxxx.c
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@ -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);
}