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Commit c73961e5 authored by Boaz Harrosh's avatar Boaz Harrosh Committed by James Bottomley
Browse files

[SCSI] scsi_debug: convert to use the data buffer accessors 



  - remove the unnecessary map_single path.
  - convert to use the new accessors for the sg lists and the
    parameters.

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
Acked-by: default avatarDouglas Gilbert <dougg@torque.net>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 48c23d3e

drivers/scsi/scsi_debug.c

+10 −27
Original line number Diff line number Diff line
@@ -329,7 +329,7 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) 
	if (done == NULL)

		return 0;	/* assume mid level reprocessing command */



	SCpnt->resid = 0;

	scsi_set_resid(SCpnt, 0);

	if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {

		printk(KERN_INFO "scsi_debug: cmd ");

		for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
@@ -603,26 +603,16 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 
	void * kaddr_off;

	struct scatterlist * sg;



	if (0 == scp->request_bufflen)

	if (0 == scsi_bufflen(scp))

		return 0;

	if (NULL == scp->request_buffer)

	if (NULL == scsi_sglist(scp))

		return (DID_ERROR << 16);

	if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||

	      (scp->sc_data_direction == DMA_FROM_DEVICE)))

		return (DID_ERROR << 16);

	if (0 == scp->use_sg) {

		req_len = scp->request_bufflen;

		act_len = (req_len < arr_len) ? req_len : arr_len;

		memcpy(scp->request_buffer, arr, act_len);

		if (scp->resid)

			scp->resid -= act_len;

		else

			scp->resid = req_len - act_len;

		return 0;

	}

	active = 1;

	req_len = act_len = 0;

	scsi_for_each_sg(scp, sg, scp->use_sg, k) {

	scsi_for_each_sg(scp, sg, scsi_sg_count(scp), k) {

		if (active) {

			kaddr = (unsigned char *)

				kmap_atomic(sg_page(sg), KM_USER0);
@@ -640,10 +630,10 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 
		}

		req_len += sg->length;

	}

	if (scp->resid)

		scp->resid -= act_len;

	if (scsi_get_resid(scp))

		scsi_set_resid(scp, scsi_get_resid(scp) - act_len);

	else

		scp->resid = req_len - act_len;

		scsi_set_resid(scp, req_len - act_len);

	return 0;

}
@@ -656,22 +646,15 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 
	void * kaddr_off;

	struct scatterlist * sg;



	if (0 == scp->request_bufflen)

	if (0 == scsi_bufflen(scp))

		return 0;

	if (NULL == scp->request_buffer)

	if (NULL == scsi_sglist(scp))

		return -1;

	if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||

	      (scp->sc_data_direction == DMA_TO_DEVICE)))

		return -1;

	if (0 == scp->use_sg) {

		req_len = scp->request_bufflen;

		len = (req_len < max_arr_len) ? req_len : max_arr_len;

		memcpy(arr, scp->request_buffer, len);

		return len;

	}

	sg = scsi_sglist(scp);

	req_len = fin = 0;

	for (k = 0; k < scp->use_sg; ++k, sg = sg_next(sg)) {

	scsi_for_each_sg(scp, sg, scsi_sg_count(scp), k) {

		kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);

		if (NULL == kaddr)

			return -1;