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firewire: Drop single buffer request support.

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The SCSI layer only passes sg requests down, so drop the
use_sg == 0, request_bufflen != 0 case.

Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg 2007-05-09 19:23:11 -04:00 committed by Stefan Richter
parent 36abb3b18e
commit 213d7bbd76
1 changed files with 1 additions and 42 deletions
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43
drivers/firewire/fw-sbp2.c
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@ -976,34 +976,6 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
return -ENOMEM;
}
static int sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
{
struct sbp2_device *sd =
(struct sbp2_device *)orb->cmd->device->host->hostdata;
struct fw_unit *unit = sd->unit;
struct fw_device *device = fw_device(unit->device.parent);
/*
* As for map_scatterlist, we need to fill in the high bits of
* the data_descriptor pointer.
*/
orb->request_buffer_bus =
dma_map_single(device->card->device,
orb->cmd->request_buffer,
orb->cmd->request_bufflen,
orb->cmd->sc_data_direction);
if (dma_mapping_error(orb->request_buffer_bus))
return -ENOMEM;
orb->request.data_descriptor.high = sd->address_high;
orb->request.data_descriptor.low = orb->request_buffer_bus;
orb->request.misc |=
COMMAND_ORB_DATA_SIZE(orb->cmd->request_bufflen);
return 0;
}
/* SCSI stack integration */
static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
@ -1063,21 +1035,8 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
orb->request.misc |=
COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
if (cmd->use_sg) {
if (sbp2_command_orb_map_scatterlist(orb) < 0)
goto fail_map_payload;
} else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) {
/*
* FIXME: Need to split this into a sg list... but
* could we get the scsi or blk layer to do that by
* reporting our max supported block size?
*/
fw_error("command > 64k\n");
if (cmd->use_sg && sbp2_command_orb_map_scatterlist(orb) < 0)
goto fail_map_payload;
} else if (cmd->request_bufflen > 0) {
if (sbp2_command_orb_map_buffer(orb) < 0)
goto fail_map_payload;
}
fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request);