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Commit 2f08fe52 authored by Jens Axboe's avatar Jens Axboe
Browse files

qlogicpti: sg chaining support 



Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 8145bfe4

drivers/scsi/qlogicpti.c

+8 −7
Original line number Original line Diff line number Diff line
@@ -868,7 +868,7 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, 
			   struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)

			   struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)

{

{

	struct dataseg *ds;

	struct dataseg *ds;

	struct scatterlist *sg;

	struct scatterlist *sg, *s;

	int i, n;

	int i, n;





	if (Cmnd->use_sg) {

	if (Cmnd->use_sg) {
@@ -884,11 +884,12 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, 
		n = sg_count;

		n = sg_count;

		if (n > 4)

		if (n > 4)

			n = 4;

			n = 4;

		for (i = 0; i < n; i++, sg++) {

		for_each_sg(sg, s, n, i) {

			ds[i].d_base = sg_dma_address(sg);

			ds[i].d_base = sg_dma_address(s);

			ds[i].d_count = sg_dma_len(sg);

			ds[i].d_count = sg_dma_len(s);

		}

		}

		sg_count -= 4;

		sg_count -= 4;

		sg = s;

		while (sg_count > 0) {

		while (sg_count > 0) {

			struct Continuation_Entry *cont;

			struct Continuation_Entry *cont;
@@ -907,9 +908,9 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, 
			n = sg_count;

			n = sg_count;

			if (n > 7)

			if (n > 7)

				n = 7;

				n = 7;

			for (i = 0; i < n; i++, sg++) {

			for_each_sg(sg, s, n, i) {

				ds[i].d_base = sg_dma_address(sg);

				ds[i].d_base = sg_dma_address(s);

				ds[i].d_count = sg_dma_len(sg);

				ds[i].d_count = sg_dma_len(s);

			}

			}

			sg_count -= n;

			sg_count -= n;

		}

		}