[alsa-devel] [PATCH 6/7] ALSA: hda/tegra: fix kernel panic

[Sameer Pujar]

On 1/22/2019 2:58 AM, Takashi Iwai wrote:
> On Mon, 21 Jan 2019 18:41:36 +0100,
> Sameer Pujar wrote:
>> Kernel panic is seen during device boot. It appears that before the
>> probe completes, runtime callbacks happen and the device setup is not
>> done yet. This could be initiated from framework through exposed
>> callbacks. This issue can be fixed by having a flag to indicate
>> completion of device probe. Hence 'probed' flag is introduced to notify
>> completion of probe and runtime callbacks can check this flag before
>> doing any device access.
> Such a fix should be rather folded into the previous, especially if
> you know it's already broken :)
Ok, I will meld this with previous commit.
>
> And, IMO, it's better to put such a check into runtime_idle callback
> instead of doing in each (runtime_)suspend/resume callback.
Check in runtime_idle would take care of suspend path. But how the check in
runtime_resume can be avoided? Kernel panic happened during 
runtime_resume().
>
>
> thanks,
>
> Takashi

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