linux-kernel - Re: [PATCH] wireless: ath10k: Return early in ath10k_qmi_event_server

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Date:   Mon, 08 Jun 2020 14:17:31 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        Govind Singh <govinds@...eaurora.org>,
        Rakesh Pillai <pillair@....qualcomm.com>,
        Brian Norris <briannorris@...omium.org>,
        ath10k@...ts.infradead.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Niklas Cassel <niklas.cassel@...aro.org>
Subject: Re: [PATCH] wireless: ath10k: Return early in ath10k_qmi_event_server_exit() to avoid hard crash on reboot

John Stultz <john.stultz@...aro.org> writes:

> Ever since 5.7-rc1, if we call
> ath10k_qmi_remove_msa_permission(), the db845c hard crashes on
> reboot, resulting in the device getting stuck in the usb crash
> debug mode and not coming back up wihthout a hard power off.
>
> This hack avoids the issue by returning early in
> ath10k_qmi_event_server_exit().
>
> A better solution is very much desired!
>
> Feedback and suggestions welcome!
>
> Cc: Rakesh Pillai <pillair@....qualcomm.com>
> Cc: Govind Singh <govinds@...eaurora.org>
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Niklas Cassel <niklas.cassel@...aro.org>
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Cc: Amit Pundir <amit.pundir@...aro.org>
> Cc: Brian Norris <briannorris@...omium.org>
> Cc: Kalle Valo <kvalo@...eaurora.org>
> Cc: ath10k@...ts.infradead.org
> Reported-by: Amit Pundir <amit.pundir@...aro.org>
> Signed-off-by: John Stultz <john.stultz@...aro.org>

Just so you know: as you didn't CC linux-wireless it's not on patchwork
and hence not on my radar. But hopefully we find a better solution to
fix this.

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