diff options
| author | Boaz Harrosh <bharrosh@panasas.com> | 2007-09-18 17:46:12 +0200 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:38 -0400 |
| commit | e10b8c3f5f23188e065b1845ba732570eca007fe (patch) | |
| tree | f236f3a850bbefc16e4819992a725f678c6a0421 | |
| parent | d2a84f47899d1efc24fa610696f7b793692279c7 (diff) | |
| download | op-kernel-dev-e10b8c3f5f23188e065b1845ba732570eca007fe.zip op-kernel-dev-e10b8c3f5f23188e065b1845ba732570eca007fe.tar.gz | |
libata-scsi: Remove !use_sg code paths
This is a minimal patch needed to remove use of !use_sg
but it is not a complete clean up of the !use_sg paths.
Libata-core still has the qc->flags & ATA_QCFLAG_SG
and !qc->n_elem code paths. Perhaps an ata maintainer
would have a go at it.
- TODO: further cleanup of qc->flags & ATA_QCFLAG_SG
and !qc->n_elem code paths in libata-core
- TODO: Use scsi_dma_{map,unmap} where applicable.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
| -rw-r--r-- | drivers/ata/libata-scsi.c | 31 |
1 files changed, 9 insertions, 22 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index f0f586b..598ef10 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -450,13 +450,8 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, qc->scsicmd = cmd; qc->scsidone = done; - if (cmd->use_sg) { - qc->__sg = (struct scatterlist *) cmd->request_buffer; - qc->n_elem = cmd->use_sg; - } else if (cmd->request_bufflen) { - qc->__sg = &qc->sgent; - qc->n_elem = 1; - } + qc->__sg = (struct scatterlist *) cmd->request_buffer; + qc->n_elem = cmd->use_sg; } else { cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); done(cmd); @@ -1504,11 +1499,7 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, goto err_did; } - if (cmd->use_sg) - ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); - else - ata_sg_init_one(qc, cmd->request_buffer, - cmd->request_bufflen); + ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); qc->dma_dir = cmd->sc_data_direction; } @@ -1562,15 +1553,14 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) u8 *buf; unsigned int buflen; - if (cmd->use_sg) { - struct scatterlist *sg; + struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer; - sg = (struct scatterlist *) cmd->request_buffer; + if (sg) { buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; buflen = sg->length; } else { - buf = cmd->request_buffer; - buflen = cmd->request_bufflen; + buf = NULL; + buflen = 0; } *buf_out = buf; @@ -1590,12 +1580,9 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) { - if (cmd->use_sg) { - struct scatterlist *sg; - - sg = (struct scatterlist *) cmd->request_buffer; + struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer; + if (sg) kunmap_atomic(buf - sg->offset, KM_IRQ0); - } } /** |
