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>
This commit is contained in:
parent
d2a84f4789
commit
e10b8c3f5f
|
@ -450,13 +450,8 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
|
||||||
qc->scsicmd = cmd;
|
qc->scsicmd = cmd;
|
||||||
qc->scsidone = done;
|
qc->scsidone = done;
|
||||||
|
|
||||||
if (cmd->use_sg) {
|
qc->__sg = (struct scatterlist *) cmd->request_buffer;
|
||||||
qc->__sg = (struct scatterlist *) cmd->request_buffer;
|
qc->n_elem = cmd->use_sg;
|
||||||
qc->n_elem = cmd->use_sg;
|
|
||||||
} else if (cmd->request_bufflen) {
|
|
||||||
qc->__sg = &qc->sgent;
|
|
||||||
qc->n_elem = 1;
|
|
||||||
}
|
|
||||||
} else {
|
} else {
|
||||||
cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
|
cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
|
||||||
done(cmd);
|
done(cmd);
|
||||||
|
@ -1504,11 +1499,7 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
|
||||||
goto err_did;
|
goto err_did;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (cmd->use_sg)
|
ata_sg_init(qc, cmd->request_buffer, 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);
|
|
||||||
|
|
||||||
qc->dma_dir = cmd->sc_data_direction;
|
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;
|
u8 *buf;
|
||||||
unsigned int buflen;
|
unsigned int buflen;
|
||||||
|
|
||||||
if (cmd->use_sg) {
|
struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
|
||||||
struct scatterlist *sg;
|
|
||||||
|
|
||||||
sg = (struct scatterlist *) cmd->request_buffer;
|
if (sg) {
|
||||||
buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
|
buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
|
||||||
buflen = sg->length;
|
buflen = sg->length;
|
||||||
} else {
|
} else {
|
||||||
buf = cmd->request_buffer;
|
buf = NULL;
|
||||||
buflen = cmd->request_bufflen;
|
buflen = 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
*buf_out = buf;
|
*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)
|
static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
|
||||||
{
|
{
|
||||||
if (cmd->use_sg) {
|
struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
|
||||||
struct scatterlist *sg;
|
if (sg)
|
||||||
|
|
||||||
sg = (struct scatterlist *) cmd->request_buffer;
|
|
||||||
kunmap_atomic(buf - sg->offset, KM_IRQ0);
|
kunmap_atomic(buf - sg->offset, KM_IRQ0);
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
|
Loading…
Reference in a new issue