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| author | K. Y. Srinivasan | 2011-08-27 20:31:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2011-08-29 20:01:07 +0200 |
| commit | fa23b8c78fefae4e8033a28e685673c35ff10789 (patch) | |
| tree | 148949cf0d5881acf2da4247ec61cf7a33733773 /drivers/staging/hv/storvsc_drv.c | |
| parent | Staging: hv: storvsc: Optimize bounce buffer handling for the "write" case (diff) | |
| download | kernel-qcow2-linux-fa23b8c78fefae4e8033a28e685673c35ff10789.tar.gz kernel-qcow2-linux-fa23b8c78fefae4e8033a28e685673c35ff10789.tar.xz kernel-qcow2-linux-fa23b8c78fefae4e8033a28e685673c35ff10789.zip | |
Staging: hv: storvsc: Optimize the bounce buffer handling in the "read" case
Optimize the bounce buffer handling in the "read" 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>
Diffstat (limited to 'drivers/staging/hv/storvsc_drv.c')
| -rw-r--r-- | 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 90b91ade825a..3e00e70c945d 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; |