Re: [PATCH v2 9/9] dpaa_eth: fix SG frame cleanup
From: Joakim Tjernlund
Date: Thu May 02 2019 - 09:04:03 EST
On Thu, 2019-05-02 at 12:58 +0000, Laurentiu Tudor wrote:
>
> > -----Original Message-----
> > From: Joakim Tjernlund <Joakim.Tjernlund@xxxxxxxxxxxx>
> > Sent: Thursday, May 2, 2019 1:37 PM
> >
> > On Thu, 2019-05-02 at 09:05 +0000, Laurentiu Tudor wrote:
> > > Hi Joakim,
> > >
> > > > -----Original Message-----
> > > > From: Joakim Tjernlund <Joakim.Tjernlund@xxxxxxxxxxxx>
> > > > Sent: Saturday, April 27, 2019 8:11 PM
> > > >
> > > > On Sat, 2019-04-27 at 10:10 +0300, laurentiu.tudor@xxxxxxx wrote:
> > > > > From: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>
> > > > >
> > > > > 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@xxxxxxx>
> > > > > Acked-by: Madalin Bucur <madalin.bucur@xxxxxxx>
> > > >
> > > > Wasn't this a stable candidate too?
> > >
> > > Yes, it is. I forgot to add the cc:stable tag, sorry about that.
> >
> > Then this is a bug fix that should go directly to linus/stable.
> >
> > I note that
> > https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fstable%2Flinux.git%2Flog%2Fdrivers%2Fnet%2Fethernet%2Ffreescale%2Fdpaa%3Fh%3Dlinux-4.19.y&data=02%7C01%7CJoakim.Tjernlund%40infinera.com%7Cb88ecc951de649e5a55808d6cefdd286%7C285643de5f5b4b03a1530ae2dc8aaf77%7C1%7C0%7C636923986895133037&sdata=ueUWI1%2BmNBHtlCoY9%2B1FreOUM8bHGiTYWhISy5nRoJk%3D&reserved=0
>
> Not sure I understand ... I don't see the patch in the link.
Sorry, I copied the wrong link:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/net/ethernet/freescale/dpaa?h=linux-4.19.y&id=0aafea5d4b22fe9403e89d82e02597e4493d5d0f
>
> > is in 4.19 but not in 4.14 , is it not appropriate for 4.14?
>
> I think it makes sense to go in both stable trees.
>
> ---
> Best Regards, Laurentiu
>
> > > > > ---
> > > > > 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
> > > > >