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| author |   FUJITA Tomonori <tomof@acm.org> | 2008-01-23 01:32:00 +0900 |
|---|---|---|
| committer |   James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-30 13:14:24 -0600 |
| commit | 072d0bb3ce3507ac6e101ca8ce0b94c5777c62ed (patch) | |
| tree | a14ccd8aa0ec666c1217536791cc0a4828ad2997 /drivers/scsi/scsi_debug.c | |
| parent | [SCSI] scsi_debug: add get_data_transfer_info helper function (diff) | |
| download | linux-dev-072d0bb3ce3507ac6e101ca8ce0b94c5777c62ed.tar.xz linux-dev-072d0bb3ce3507ac6e101ca8ce0b94c5777c62ed.zip | |
[SCSI] scsi_debug: add bidi data transfer support
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 31f7378c5c46..d810aa7aee40 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -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) { |