ath11k-qca crashing

[André Eberle]

After some more debugging, I figured there is some problem on TX.
Right now, adding small delays to the ath11k_nss_tx function in nss.c
is preventing the crash from happening. Could someone point me to
where race conditions/other issues could be happening on the TX stack?

On Thu, Apr 15, 2021 at 3:01 PM André Eberle <andre.eberle at gmail.com> wrote:
>
> I have attached the dmesg. It is the UART dump essentially, so it
> includes some pre-boot info, maybe it is useful:
>
> https://drive.google.com/file/d/1u5_C7q6yK9qRyq4TJYQpkZeU-1eQmRwR/view?usp=sharing
>
> There is no stack trace dump during the crash, unfortunately. As you
> can see the system suddenly reboots (sometimes it just freezes).
>
> I have added the logread from openwrt also. This one has trace-level
> messages from dmesg, so maybe it is more helpful. I enabled maximum
> debug level for ath11 on this one, hope it helps:
>
> echo 0xffffffff > /sys/module/ath11k/parameters/debug_mask
>
> https://drive.google.com/file/d/1sasD99QVf2UqF7lOQ_pD5JhI43Ie3DO6/view?usp=sharing
>
> On Thu, Apr 15, 2021 at 6:48 AM Bhagavathi Perumal S
> <bperumal at codeaurora.org> wrote:
> >
> > On 2021-04-15 14:58, Bhagavathi Perumal S wrote:
> > > Hello,
> > >
> > > I have been using the ath11k wireless driver (qca version ie. QSDK) in
> > > a IPQ807x router, but I am facing crashes. Ethernet and WAN work fine.
> > >
> > >
> > > I can connect to WiFi, and receive an address from DHCP. I can even
> > > send/receive a number of packets via the wifi nic, but if I try to,
> > > say, send/recv a larger number of packets at once (like visiting a
> > > webpage), the kernel crashes. I have been digging into the NSS and
> > > ath11k drivers trying to isolate the problem, but so far my debugging
> > > attempts have failed. I have so far failed to set up kgdb on qsdk
> > > also, so no help on that front.
> > >
> > > What is the best way to debug the ath11k drivers for such problems? Or
> > > at least try to determine if the crashes are from the driver, or
> > > elsewhere in the NSS system?
> >
> > Serial logs and crash dump will help to debug the kernel crashes. Please
> > share dmesg logs and serial logs from power on and please share call
> > stack details during crash if any.
> >
> > >
> > > --
> > >
> > > ath11k mailing list
> > >
> > > ath11k at lists.infradead.org
> > >
> > > http://lists.infradead.org/mailman/listinfo/ath11k