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Commit 3612ef99 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Staging: hv: storvsc: Optimize bounce buffer handling for the "write" case 



Optimize bounce buffer handling for the "write" case.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b38cc434

drivers/staging/hv/storvsc_drv.c

+6 −6
Original line number Original line Diff line number Diff line
@@ -425,17 +425,17 @@ static void storvsc_commmand_completion(struct hv_storvsc_request *request) 
	struct scsi_sense_hdr sense_hdr;

	struct scsi_sense_hdr sense_hdr;

	struct vmscsi_request *vm_srb;

	struct vmscsi_request *vm_srb;





	vm_srb = &request->vstor_packet.vm_srb;

	if (cmd_request->bounce_sgl_count) {

	if (cmd_request->bounce_sgl_count) {



		if (vm_srb->data_in == READ_TYPE) {

		/* FIXME: We can optimize on writes by just skipping this */

			copy_from_bounce_buffer(scsi_sglist(scmnd),

			copy_from_bounce_buffer(scsi_sglist(scmnd),

					cmd_request->bounce_sgl,

					cmd_request->bounce_sgl,

					scsi_sg_count(scmnd));

					scsi_sg_count(scmnd));

			destroy_bounce_buffer(cmd_request->bounce_sgl,

			destroy_bounce_buffer(cmd_request->bounce_sgl,

					cmd_request->bounce_sgl_count);

					cmd_request->bounce_sgl_count);

		}

		}

	}





	vm_srb = &request->vstor_packet.vm_srb;

	scmnd->result = vm_srb->scsi_status;

	scmnd->result = vm_srb->scsi_status;





	if (scmnd->result) {

	if (scmnd->result) {