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Commit 213d7bbd authored by Kristian Høgsberg's avatar Kristian Høgsberg Committed by Stefan Richter
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firewire: Drop single buffer request support. 



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

Signed-off-by: default avatarKristian Hoegsberg <krh@redhat.com>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 36abb3b1

drivers/firewire/fw-sbp2.c

+1 −42
Original line number Diff line number Diff line
@@ -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)

	if (cmd->use_sg && 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");

		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);