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SubjectRe: mt76x2e hardware restart
> Hello.
>
> On 15.10.2019 18:52, Oleksandr Natalenko wrote:
> > Thanks for the answer and the IRC discussion. As agreed I've applied
> > [1] and [2], and have just swapped the card to try it again. So far,
> > it works fine in 5 GHz band in 802.11ac mode as an AP.
> >
> > I'll give it more load with my phone over evening, and we can discuss
> > what to do next (if needed) tomorrow again. Or feel free to drop me an
> > email today.
> >
> > Thanks for your efforts.
> >
> > [1]
> > https://github.com/LorenzoBianconi/wireless-drivers-next/commit/cf3436c42a297967235a9c9778620c585100529e.patch
> > [2]
> > https://github.com/LorenzoBianconi/wireless-drivers-next/commit/aad256eb62620f9646d39c1aa69234f50c89eed8.patch
>
> As agreed, here are iperf3 results, AP to STA distance is 2 meters.
>
> Client sends, TCP:
>
> [ ID] Interval Transfer Bitrate Retr
> [ 5] 0.00-10.00 sec 70.4 MBytes 59.0 Mbits/sec 3800
> sender
> [ 5] 0.00-10.03 sec 70.0 MBytes 58.6 Mbits/sec
> receiver
>
> Client receives, TCP:
>
> [ ID] Interval Transfer Bitrate Retr
> [ 5] 0.00-10.06 sec 196 MBytes 163 Mbits/sec 3081
> sender
> [ 5] 0.00-10.01 sec 191 MBytes 160 Mbits/sec
> receiver
>
> Client sends, UDP, 128 streams:
>
> [ ID] Interval Transfer Bitrate Jitter Lost/Total
> Datagrams
> [SUM] 0.00-10.00 sec 160 MBytes 134 Mbits/sec 0.000 ms 0/115894
> (0%) sender
> [SUM] 0.00-10.01 sec 160 MBytes 134 Mbits/sec 0.347 ms 0/115892
> (0%) receiver
>
> Client receives, UDP, 128 streams:
>
> [ ID] Interval Transfer Bitrate Jitter Lost/Total
> Datagrams
> [SUM] 0.00-10.01 sec 119 MBytes 99.4 Mbits/sec 0.000 ms 0/85888 (0%)
> sender
> [SUM] 0.00-10.00 sec 119 MBytes 99.5 Mbits/sec 0.877 ms 0/85888 (0%)
> receiver
>
> Given the HW is not the most powerful, the key point here is that nothing
> crashed after doing these tests.

Hi Oleksandr,

thx a lot for testing these 2 patches. Now we need to understand why the chip
hangs if we enable scatter gather dma transfer on x86 while it is working fine
on multiple mips/arm devices (patch 2/2 just disable it for debugging).

Regards,
Lorenzo

>
> --
> Oleksandr Natalenko (post-factum)
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