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Staging: hv: storvsc: Optimize bounce buffer handling for the "write" case

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Optimize bounce buffer handling for the "write" case.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan
2011-08-27 11:31:20 -07:00
committed by Greg Kroah-Hartman
parent b38cc43432
commit 3612ef99b0
1 changed files with 6 additions and 6 deletions
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12
drivers/staging/hv/storvsc_drv.c
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@@ -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) {