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[SCSI] u14-34f: convert to use the data buffer accessors 

- 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 19:24:58 +09:00 committed by James Bottomley
parent d178671356
commit fea97f9ab2
1 changed files with 24 additions and 30 deletions
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54
drivers/scsi/u14-34f.c
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@ -1111,7 +1111,7 @@ static int u14_34f_detect(struct scsi_host_template *tpnt) {
static void map_dma(unsigned int i, unsigned int j) {
unsigned int data_len = 0;
unsigned int k, count, pci_dir;
struct scatterlist *sgpnt;
struct scatterlist *sg;
struct mscp *cpp;
struct scsi_cmnd *SCpnt;
@ -1124,33 +1124,28 @@ static void map_dma(unsigned int i, unsigned int j) {
cpp->sense_len = sizeof SCpnt->sense_buffer;
if (!SCpnt->use_sg) {
if (scsi_bufflen(SCpnt)) {
count = scsi_dma_map(SCpnt);
BUG_ON(count < 0);
/* If we get here with PCI_DMA_NONE, pci_map_single triggers a BUG() */
if (!SCpnt->request_bufflen) pci_dir = PCI_DMA_BIDIRECTIONAL;
scsi_for_each_sg(SCpnt, sg, count, k) {
cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
data_len += sg->length;
}
if (SCpnt->request_buffer)
cpp->data_address = H2DEV(pci_map_single(HD(j)->pdev,
SCpnt->request_buffer, SCpnt->request_bufflen, pci_dir));
cpp->sg = TRUE;
cpp->use_sg = scsi_sg_count(SCpnt);
cpp->data_address =
H2DEV(pci_map_single(HD(j)->pdev, cpp->sglist,
cpp->use_sg * sizeof(struct sg_list),
pci_dir));
cpp->data_len = H2DEV(data_len);
cpp->data_len = H2DEV(SCpnt->request_bufflen);
return;
}
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
count = pci_map_sg(HD(j)->pdev, sgpnt, SCpnt->use_sg, pci_dir);
for (k = 0; k < count; k++) {
cpp->sglist[k].address = H2DEV(sg_dma_address(&sgpnt[k]));
cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(&sgpnt[k]));
data_len += sgpnt[k].length;
}
cpp->sg = TRUE;
cpp->use_sg = SCpnt->use_sg;
cpp->data_address = H2DEV(pci_map_single(HD(j)->pdev, cpp->sglist,
SCpnt->use_sg * sizeof(struct sg_list), pci_dir));
cpp->data_len = H2DEV(data_len);
} else {
pci_dir = PCI_DMA_BIDIRECTIONAL;
cpp->data_len = H2DEV(scsi_bufflen(SCpnt));
}
}
static void unmap_dma(unsigned int i, unsigned int j) {
@ -1165,8 +1160,7 @@ static void unmap_dma(unsigned int i, unsigned int j) {
pci_unmap_single(HD(j)->pdev, DEV2H(cpp->sense_addr),
DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
if (SCpnt->use_sg)
pci_unmap_sg(HD(j)->pdev, SCpnt->request_buffer, SCpnt->use_sg, pci_dir);
scsi_dma_unmap(SCpnt);
if (!DEV2H(cpp->data_len)) pci_dir = PCI_DMA_BIDIRECTIONAL;
@ -1187,9 +1181,9 @@ static void sync_dma(unsigned int i, unsigned int j) {
pci_dma_sync_single_for_cpu(HD(j)->pdev, DEV2H(cpp->sense_addr),
DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
if (SCpnt->use_sg)
pci_dma_sync_sg_for_cpu(HD(j)->pdev, SCpnt->request_buffer,
SCpnt->use_sg, pci_dir);
if (scsi_sg_count(SCpnt))
pci_dma_sync_sg_for_cpu(HD(j)->pdev, scsi_sglist(SCpnt),
scsi_sg_count(SCpnt), pci_dir);
if (!DEV2H(cpp->data_len)) pci_dir = PCI_DMA_BIDIRECTIONAL;