[alsa-devel] [PATCH 1/2] ALSA: hda: hdmi - fix kernel oops caused by invalid PCM idx

[Nikhil Mahale]

Oh sorry again for this regression, Kai.

Originally my patches were developed with slightly older code which doesn't have your commit 2a2edfbbfee4 (ALSA: hda/hdmi - implement mst_no_extra_pcms flag), when I merge them with tot I did not notice codec->mst_no_extra_pcms mode.

This patch looks good to me.

Thanks,
Nikhil Mahale

On 11/29/19 8:13 PM, Takashi Iwai wrote:
> On Fri, 29 Nov 2019 15:37:55 +0100,
> Kai Vehmanen wrote:
>>
>> Add additional check in hdmi_find_pcm_slot() to not return
>> a pcm index that points to unallocated pcm. This could happen
>> if codec driver is set up in codec->mst_no_extra_pcms mode.
>> On some platforms, this leads to a kernel oops in snd_ctl_notify(),
>> called via update_eld().
>>
>> BugLink: https://github.com/thesofproject/linux/issues/1536
>> Fixes: 5398e94fb753 ALSA: hda - Add DP-MST support for NVIDIA codecs
>> Signed-off-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
> 
> Applied, thanks.
> 
> 
> Takashi
> 

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