Re: ath11k-qca crashing

From: Bhagavathi Perumal S <bperumal@codeaurora.org>
To: "André Eberle" <andre.eberle@gmail.com>
Cc: ath11k@lists.infradead.org
Subject: Re: ath11k-qca crashing
Date: Tue, 20 Apr 2021 16:05:12 +0530	[thread overview]
Message-ID: <2100b7360df7c8fc4b695cd06851dc01@codeaurora.org> (raw)
In-Reply-To: <CA+D0iCL3wmHRLYBpt-QKoVGZNmNUzLHuG+ZyG8UALt=WeDuA_w@mail.gmail.com>

On 2021-04-18 00:45, André Eberle wrote:
> 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?
> 

Upstream ath11k driver is not using the api ath11k_nss_tx(), I think you 
are using some private ath11k driver, can you please check whether the 
ath11k driver is completed enabled and fully tested for the platform 
"IPQ807x/AP-AC04"?

> On Thu, Apr 15, 2021 at 3:01 PM André Eberle <andre.eberle@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@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@lists.infradead.org
>> > >
>> > > http://lists.infradead.org/mailman/listinfo/ath11k

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