On Wed, Jun 27, 2012 at 12:01:01PM +0200, walter harms wrote:
>
>
> Am 27.06.2012 11:00, schrieb Dan Carpenter:
> > scsi_dma_map() returns -ENOMEM on error.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > ---
> > Originally sent on Tue, 20 Sep 2011.
> >
> > diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
> > index 374c4ed..b2c3a1a 100644
> > --- a/drivers/scsi/advansys.c
> > +++ b/drivers/scsi/advansys.c
> > @@ -8426,6 +8426,12 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
> >
> > /* Build ASC_SCSI_Q */
> > use_sg = scsi_dma_map(scp);
> > + if (use_sg < 0) {
> > + scsi_dma_unmap(scp);
> > + scp->result = HOST_BYTE(DID_SOFT_ERROR);
> > + return ASC_ERROR;
> > + }
> > +
> > if (use_sg != 0) {
> > int sgcnt;
> > struct scatterlist *slp;
>
> Q:if use_sg == 0 a special case ?
>
Yes. scsi_dma_map() returns the number of sg lists actually used,
zero if the sg lists is NULL, or -ENOMEM if the mapping failed.
regards,
dan carpenter
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