linux-kernel - Re: [PATCH][next] ASoC: rsnd: check for zero node count

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Date:   03 Jun 2021 07:19:20 +0900
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Colin King <colin.king@...onical.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] ASoC: rsnd: check for zero node count


Hi

> > From: Colin Ian King <colin.king@...onical.com>
> > 
> > The call to rsnd_node_count can potentially return a zero node count
> > so add a check for this corner case. (Note that the two other calls
> > to rsnd_node_count in the kernel perform this check, so I think it
> > justifies adding this). This avoids using a zero nr in a devm_kcalloc
> > call.
> 
> I don't have a problem with the patch, but really the code works fine
> as is.  A better commit message is:
> 
>   Most callers of_get_child_count() check that "nr" is non-zero so it
>   causes a static checker warning when we don't do that here.  This
>   doesn't cause a problem or a crash, but having zero SSUIes (What's
>   plural of ssui?) doesn't make sense either so let's add a check.

For the code

	Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>


Thank you for your help !!

Best regards
---
Kuninori Morimoto