From: Feng Tang <feng.t...@intel.com> Date: Wed, 25 May 2016 14:49:54 +0800
> This patch follows Eric Dumazet's commit 7b70176421 for Atheros > atl1c driver to fix one exactly same bug in alx driver, that the > network link will be lost in 1-5 minutes after the device is up. > > My laptop Lenovo Y580 with Atheros AR8161 ethernet device hit the > same problem with kernel 4.4, and it will be cured by Jarod Wilson's > commit c406700c for alx driver which get merged in 4.5. But there > are still some alx devices can't function well even with Jarod's > patch, while this patch could make them work fine. More details on > https://bugzilla.kernel.org/show_bug.cgi?id=70761 > > The debug shows the issue is very likely to be related with the RX > DMA address, specifically 0x...f80, if RX buffer get 0x...f80 several > times, their will be RX overflow error and device will stop working. > > For kernel 4.5.0 with Jarod's patch which works fine with my > AR8161/Lennov Y580, if I made some change to the > __netdev_alloc_skb > --> __alloc_page_frag() > to make the allocated buffer can get an address with 0x...f80, > then the same error happens. If I make it to 0x...f40 or 0x....fc0, > everything will be still fine. So I tend to believe that the > 0x..f80 address cause the silicon to behave abnormally. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70761 > Cc: Eric Dumazet <eduma...@google.com> > Cc: Johannes Berg <johan...@sipsolutions.net> > Cc: Jarod Wilson <ja...@redhat.com> > Signed-off-by: Feng Tang <feng.t...@intel.com> > Tested-by: Ole Lukoie <oleluk...@mail.ru> Looks good, applied, thanks. But now that we have at least two instances of this code we really need to put a common version somewhere. :-/
