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[SCSI] scsi_debug: add bidi data transfer support

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This enables fill_from_dev_buffer and fetch_to_dev_buffer to handle
bidi commands.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Douglas Gilbert <dougg@torque.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
FUJITA Tomonori 2008-01-23 01:32:00 +09:00 committed by James Bottomley
parent 3de9f94479
commit 072d0bb3ce
1 changed files with 10 additions and 11 deletions
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21
drivers/scsi/scsi_debug.c
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@ -594,18 +594,18 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
int k, req_len, act_len, len, active;
void * kaddr;
void * kaddr_off;
struct scatterlist * sg;
struct scatterlist *sg;
struct scsi_data_buffer *sdb = scsi_in(scp);
if (0 == scsi_bufflen(scp))
if (!sdb->length)
return 0;
if (NULL == scsi_sglist(scp))
if (!sdb->table.sgl)
return (DID_ERROR << 16);
if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
(scp->sc_data_direction == DMA_FROM_DEVICE)))
if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
return (DID_ERROR << 16);
active = 1;
req_len = act_len = 0;
scsi_for_each_sg(scp, sg, scsi_sg_count(scp), k) {
for_each_sg(sdb->table.sgl, sg, sdb->table.nents, k) {
if (active) {
kaddr = (unsigned char *)
kmap_atomic(sg_page(sg), KM_USER0);
@ -623,10 +623,10 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
}
req_len += sg->length;
}
if (scsi_get_resid(scp))
scsi_set_resid(scp, scsi_get_resid(scp) - act_len);
if (sdb->resid)
sdb->resid -= act_len;
else
scsi_set_resid(scp, req_len - act_len);
sdb->resid = req_len - act_len;
return 0;
}
@ -643,8 +643,7 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
return 0;
if (NULL == scsi_sglist(scp))
return -1;
if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
(scp->sc_data_direction == DMA_TO_DEVICE)))
if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
return -1;
req_len = fin = 0;
scsi_for_each_sg(scp, sg, scsi_sg_count(scp), k) {