From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751764Ab1H0SLa (ORCPT ); Sat, 27 Aug 2011 14:11:30 -0400 Received: from p3plsmtps2ded03.prod.phx3.secureserver.net ([208.109.80.60]:54786 "HELO p3plsmtps2ded03-02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751470Ab1H0SLL (ORCPT ); Sat, 27 Aug 2011 14:11:11 -0400 From: "K. Y. Srinivasan" To: gregkh@suse.de, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, virtualization@lists.osdl.org Cc: "K. Y. Srinivasan" , Haiyang Zhang Subject: [PATCH 22/46] Staging: hv: storvsc: Optimize the bounce buffer handling in the "read" case Date: Sat, 27 Aug 2011 11:31:21 -0700 Message-Id: <1314469905-7058-22-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1314469905-7058-1-git-send-email-kys@microsoft.com> References: <1314469874-7017-1-git-send-email-kys@microsoft.com> <1314469905-7058-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Optimize the bounce buffer handling in the "read" case. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang --- 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 90b91ad..3e00e70 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -560,12 +560,10 @@ 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