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Staging: hv: storvsc: Optimize the bounce buffer handling in the "read" case

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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>
This commit is contained in:
K. Y. Srinivasan 2011-08-27 11:31:21 -07:00 committed by Greg Kroah-Hartman
parent 3612ef99b0
commit fa23b8c78f
1 changed files with 4 additions and 6 deletions
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10
drivers/staging/hv/storvsc_drv.c
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@ -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;