linux-kernel - RE: [PATCH] ASoC: Intel: sst: ipc command timeout

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Date:   Thu, 7 May 2020 02:19:40 +0000
From:   "Lu, Brent" <brent.lu@...el.com>
To:     Keyon Jie <yang.jie@...ux.intel.com>,
        "Rojewski, Cezary" <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
CC:     Kate Stewart <kstewart@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "clang-built-linux@...glegroups.com" 
        <clang-built-linux@...glegroups.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        "Richard Fontana" <rfontana@...hat.com>,
        Mark Brown <broonie@...nel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        Allison Randal <allison@...utok.net>,
        "amadeuszx.slawinski@...ux.intel.com" 
        <amadeuszx.slawinski@...ux.intel.com>
Subject: RE: [PATCH] ASoC: Intel: sst: ipc command timeout

> 
> Looks there is race between the previous stream stop and the current
> stream start here. Can you help try changing the
> sst_byt_stream_start/stop() from 'nowait' mode to 'wait' mode, and see if
> the issue can be reproduced with it?

Hi Keyon,

Kernel panic if the mode is changed. The defect could happen to the first
ALLOC_STREAM command after bootstrap so I think the START/DROP_STRAM
may not work. 


Regards,
Brent
> 
> 
> Thanks,
> ~Keyon
>