Commit 3612ef99 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman

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
...@@ -425,17 +425,17 @@ static void storvsc_commmand_completion(struct hv_storvsc_request *request) ...@@ -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) {
......
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