[PATCH 13/13] dpaa_eth: fix SG frame cleanup

[Laurentiu Tudor]

Hi Joakim,

> -----Original Message-----
> From: Joakim Tjernlund [mailto:Joakim.Tjernlund at infinera.com]
> Sent: Friday, March 29, 2019 5:25 PM> 
> 
> Should this one go stable 4.14/4.19 too?

Good point. I also think it makes sense to cc: stable.

---
Best Regards, Laurentiu

> On Fri, 2019-03-29 at 16:00 +0200, laurentiu.tudor at nxp.com wrote:
> >
> > From: Laurentiu Tudor <laurentiu.tudor at nxp.com>
> >
> > Fix issue with the entry indexing in the sg frame cleanup code being
> > off-by-1. This problem showed up when doing some basic iperf tests and
> > manifested in traffic coming to a halt.
> >
> > Signed-off-by: Laurentiu Tudor <laurentiu.tudor at nxp.com>
> > Acked-by: Madalin Bucur <madalin.bucur at nxp.com>
> > ---
> >  drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > index daede7272768..40420edc9ce6 100644
> > --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> > @@ -1663,7 +1663,7 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const
> struct dpaa_priv *priv,
> >                                  qm_sg_entry_get_len(&sgt[0]), dma_dir);
> >
> >                 /* remaining pages were mapped with skb_frag_dma_map()
> */
> > -               for (i = 1; i < nr_frags; i++) {
> > +               for (i = 1; i <= nr_frags; i++) {
> >                         WARN_ON(qm_sg_entry_is_ext(&sgt[i]));
> >
> >                         dma_unmap_page(dev, qm_sg_addr(&sgt[i]),
> > --
> > 2.17.1
> >