linux-kernel - Re: [alsa-devel] [RFC PATCH 06/40] soundwire: intel: prevent possible dereference in hw

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Message-ID: <20190802155738.GR12733@vkoul-mobl.Dlink>
Date:   Fri, 2 Aug 2019 21:27:38 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, tiwai@...e.de,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org, srinivas.kandagatla@...aro.org,
        jank@...ence.com, slawomir.blauciak@...el.com,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [RFC PATCH 06/40] soundwire: intel: prevent
 possible dereference in hw_params

On 02-08-19, 10:16, Pierre-Louis Bossart wrote:
> 
> 
> On 8/2/19 6:55 AM, Vinod Koul wrote:
> > On 25-07-19, 18:39, Pierre-Louis Bossart wrote:
> > > This should not happen in production systems but we should test for
> > > all callback arguments before invoking the config_stream callback.
> > 
> > so you are saying callback arg is mandatory, if so please document that
> > assumption
> 
> no, what this says is that if a config_stream is provided then it needs to
> have a valid argument.

well typically args are not mandatory..

> I am not sure what you mean by "document that assumption", comment in the
> code (where?) or SoundWire documentation?

The callback documentation which in this is in include/linux/soundwire/sdw_intel.h

-- 
~Vinod