Optimize the bounce buffer handling in the "read" case. Copy to bounce buffers (if needed) when we initiate an I/O, only if we are performing a "write" operation. Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Signed-off-by: Abhishek Kane <v-abkane@xxxxxxxxxxxxx> Signed-off-by: Hank Janssen <hjanssen@xxxxxxxxxxxxx> --- drivers/staging/hv/storvsc_drv.c | 10 ++++------ 1 files changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c index c6838fd..23334ad 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -623,12 +623,10 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd, ALIGN(scsi_bufflen(scmnd), PAGE_SIZE) >> PAGE_SHIFT; - /* - * FIXME: We can optimize on reads by just skipping - * this - */ - copy_to_bounce_buffer(sgl, cmd_request->bounce_sgl, - scsi_sg_count(scmnd)); + if (vm_srb->data_in == WRITE_TYPE) + copy_to_bounce_buffer(sgl, + cmd_request->bounce_sgl, + scsi_sg_count(scmnd)); sgl = cmd_request->bounce_sgl; sg_count = cmd_request->bounce_sgl_count; -- 1.7.4.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
