linux-kernel - Re: [PATCH] ASoC: amd: acp: Fix initialization of ext_intr_stat1 in i2s_irq

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Date:   Mon, 25 Jul 2022 13:30:27 -0700
From:   Tom Rix <trix@...hat.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] ASoC: amd: acp: Fix initialization of ext_intr_stat1 in
 i2s_irq_handler()


On 7/25/22 11:05 AM, Nathan Chancellor wrote:
> Clang warns:
>
>    ../sound/soc/amd/acp/acp-platform.c:117:19: error: variable 'ext_intr_stat1' is uninitialized when used here [-Werror,-Wuninitialized]
>                            if (stream && (ext_intr_stat1 & stream->irq_bit)) {
>                                           ^~~~~~~~~~~~~~
>    ../sound/soc/amd/acp/acp-platform.c:97:35: note: initialize the variable 'ext_intr_stat1' to silence this warning
>            u32 ext_intr_stat, ext_intr_stat1, i;
>                                             ^
>                                              = 0
>    1 error generated.
>
> The variable was not properly renamed, correct it to resolve the
> warning.
>
> Fixes: 93f53881473c ("ASoC: amd: acp: Modify local variables name to generic")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1675
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>
Reviewed-by: Tom Rix <trix@...hat.com>
> ---
>   sound/soc/amd/acp/acp-platform.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sound/soc/amd/acp/acp-platform.c b/sound/soc/amd/acp/acp-platform.c
> index 10730d33c3b0..f561d39b33e2 100644
> --- a/sound/soc/amd/acp/acp-platform.c
> +++ b/sound/soc/amd/acp/acp-platform.c
> @@ -100,7 +100,7 @@ static irqreturn_t i2s_irq_handler(int irq, void *data)
>   		return IRQ_NONE;
>   
>   	if (adata->rsrc->no_of_ctrls == 2)
> -		ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
> +		ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
>   
>   	ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
>   
>
> base-commit: be0aa8d4b0fcb4532bf7973141e911998ab39508