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[SCSI] aha1740: convert to use the data buffer accessors

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- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori 2007-05-14 20:26:06 +09:00 committed by James Bottomley
parent 985c0a7277
commit c66cc13c16
1 changed files with 15 additions and 33 deletions
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48
drivers/scsi/aha1740.c
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@ -271,20 +271,8 @@ static irqreturn_t aha1740_intr_handle(int irq, void *dev_id)
continue;
}
sgptr = (struct aha1740_sg *) SCtmp->host_scribble;
if (SCtmp->use_sg) {
/* We used scatter-gather.
Do the unmapping dance. */
dma_unmap_sg (&edev->dev,
(struct scatterlist *) SCtmp->request_buffer,
SCtmp->use_sg,
SCtmp->sc_data_direction);
} else {
dma_unmap_single (&edev->dev,
sgptr->buf_dma_addr,
SCtmp->request_bufflen,
DMA_BIDIRECTIONAL);
}
scsi_dma_unmap(SCtmp);
/* Free the sg block */
dma_free_coherent (&edev->dev,
sizeof (struct aha1740_sg),
@ -349,11 +337,9 @@ static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
unchar target = scmd_id(SCpnt);
struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
unsigned long flags;
void *buff = SCpnt->request_buffer;
int bufflen = SCpnt->request_bufflen;
dma_addr_t sg_dma;
struct aha1740_sg *sgptr;
int ecbno;
int ecbno, nseg;
DEB(int i);
if(*cmd == REQUEST_SENSE) {
@ -423,24 +409,23 @@ static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
}
sgptr = (struct aha1740_sg *) SCpnt->host_scribble;
sgptr->sg_dma_addr = sg_dma;
if (SCpnt->use_sg) {
struct scatterlist * sgpnt;
nseg = scsi_dma_map(SCpnt);
BUG_ON(nseg < 0);
if (nseg) {
struct scatterlist *sg;
struct aha1740_chain * cptr;
int i, count;
int i;
DEB(unsigned char * ptr);
host->ecb[ecbno].sg = 1; /* SCSI Initiator Command
* w/scatter-gather*/
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
cptr = sgptr->sg_chain;
count = dma_map_sg (&host->edev->dev, sgpnt, SCpnt->use_sg,
SCpnt->sc_data_direction);
for(i=0; i < count; i++) {
cptr[i].datalen = sg_dma_len (sgpnt + i);
cptr[i].dataptr = sg_dma_address (sgpnt + i);
scsi_for_each_sg(SCpnt, sg, nseg, i) {
cptr[i].datalen = sg_dma_len (sg);
cptr[i].dataptr = sg_dma_address (sg);
}
host->ecb[ecbno].datalen = count*sizeof(struct aha1740_chain);
host->ecb[ecbno].datalen = nseg * sizeof(struct aha1740_chain);
host->ecb[ecbno].dataptr = sg_dma;
#ifdef DEBUG
printk("cptr %x: ",cptr);
@ -448,11 +433,8 @@ static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
for(i=0;i<24;i++) printk("%02x ", ptr[i]);
#endif
} else {
host->ecb[ecbno].datalen = bufflen;
sgptr->buf_dma_addr = dma_map_single (&host->edev->dev,
buff, bufflen,
DMA_BIDIRECTIONAL);
host->ecb[ecbno].dataptr = sgptr->buf_dma_addr;
host->ecb[ecbno].datalen = 0;
host->ecb[ecbno].dataptr = 0;
}
host->ecb[ecbno].lun = SCpnt->device->lun;
host->ecb[ecbno].ses = 1; /* Suppress underrun errors */