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From:   Kalle Valo <kvalo@codeaurora.org>
To:     Amit Pundir <amit.pundir@linaro.org>
Cc:     Govind Singh <govinds@codeaurora.org>,
        Rakesh Pillai <pillair@qti.qualcomm.com>,
        Brian Norris <briannorris@chromium.org>,
        lkml <linux-kernel@vger.kernel.org>,
        ath10k <ath10k@lists.infradead.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        Sibi Sankar <sibis@codeaurora.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        Niklas Cassel <niklas.cassel@linaro.org>
Subject: Re: [PATCH] wireless: ath10k: Return early in ath10k_qmi_event_server_exit() to avoid hard crash on reboot
References: <20200602052533.15048-1-john.stultz@linaro.org>
        <CA+ASDXMbNvbBdsC11dzUPX7RkMFYhJev2npPsRD_SnGQB+1hag@mail.gmail.com>
        <CALAqxLVA1ZQjwEdbX5KGbSyLnMBAzm9PoN_Ta_Z7rBf4w3GOvQ@mail.gmail.com>
        <CA+ASDXPddgOvEX___unx7N2YsQctsZN+1vkwPbi8Ab_zfwFfzw@mail.gmail.com>
        <20200603002715.GA5349@Mani-XPS-13-9360>
        <87zh9diyam.fsf@codeaurora.org>
        <CAMi1Hd3FBRrwysMX6NLhKzjDukm-YPooR7LX64i=HJHDD8_Dvw@mail.gmail.com>
Date:   Fri, 28 Aug 2020 15:52:49 +0300
In-Reply-To: <CAMi1Hd3FBRrwysMX6NLhKzjDukm-YPooR7LX64i=HJHDD8_Dvw@mail.gmail.com>
        (Amit Pundir's message of "Mon, 17 Aug 2020 14:36:09 +0530")
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Amit Pundir <amit.pundir@linaro.org> writes:

> On Mon, 8 Jun 2020 at 17:07, Kalle Valo <kvalo@codeaurora.org> wrote:
>> > I don't agree with this. If you read through the replies to the bug report,
>> > it is clear that NS migration uncovered a corner case or even a bug. So we
>> > should try to fix that indeed.
>>
>> I'm with Mani, we should try to fix ath10k instead. Hopefully we can
>> find a fix soon.
>
> Hi Team,
>
> Any updates on this? I can reproduce this hard crash on v5.9-rc1 as well.
>
> It is not a blocker for us because we switched to a userspace
> workaround, where we do not wait for modem to shutdown gracefully and
> SIGKILL it instead, during the shutdown/reboot process. But I'm happy
> to take a swing at any intermediate/in-progress solution available.

Govind submitted this patch and later he asked to drop it, but I think
it would be a good idea to test it anyway:

ath10k: Move msa region map/unmap to init/deinit path

https://lkml.kernel.org/r/1591191231-31917-1-git-send-email-govinds@codeaurora.org

(patchwork is down so I cannot give a patchwork link)

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches