linux-kernel - Re: [PATCH for-4.11] ASoC: don't dereference NULL pcm

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Message-ID: <87shmgd5yz.wl%kuninori.morimoto.gx@renesas.com>
Date:   Tue, 14 Mar 2017 01:07:33 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Brian Norris <briannorris@...omium.org>
CC:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        <linux-kernel@...r.kernel.org>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, <alsa-devel@...a-project.org>
Subject: Re: [PATCH for-4.11] ASoC: don't dereference NULL pcm_{new,free}


Hi Brian

> > The crasher was snd_dmaengine_pcm_register's platform ?
> 
> No, actually it wasn't. It was spi2.0, which was a dummy, from
> snd_soc_dummy_probe(). But somehow snd_soc_platform_drv_pcm_new() got
> called for it...

Hmm.. I couldn't reproduce your issue on my system with dummy platform.
And your log is indicating something is happening which shouldn't happen.

Best regards
---
Kuninori Morimoto