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Message-ID: <f6c92e55-93f5-e5c6-e5ca-4c24fd59f245@ti.com>
Date:   Thu, 20 Apr 2023 11:19:59 +0530
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Subject: Re: [PATCH] soc: ti: pruss: Avoid cast to incompatible function type
Content-Language: en-US
To:     Simon Horman <horms@kernel.org>, Nishanth Menon <nm@ti.com>,
        Santosh Shilimkar <ssantosh@kernel.org>
CC:     Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Tom Rix <trix@redhat.com>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <llvm@lists.linux.dev>
References: <20230418-pruss-clk-cb-v1-1-549a7e7febe4@kernel.org>
From:   Md Danish Anwar <a0501179@ti.com>
Organization: Texas Instruments
In-Reply-To: <20230418-pruss-clk-cb-v1-1-549a7e7febe4@kernel.org>
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On 18/04/23 17:11, Simon Horman wrote:
> Rather than casting clk_unregister_mux to an incompatible function
> type provide a trivial wrapper with the correct signature for the
> use-case.
> 
> Reported by clang-16 with W=1:
> 
>  drivers/soc/ti/pruss.c:158:38: error: cast from 'void (*)(struct clk *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
>          ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux,
> 
> No functional change intended.
> Compile tested only.
> 
> Signed-off-by: Simon Horman <horms@kernel.org>
> ---
>  drivers/soc/ti/pruss.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
> index 6882c86b3ce5..e68441bd7b30 100644
> --- a/drivers/soc/ti/pruss.c
> +++ b/drivers/soc/ti/pruss.c
> @@ -38,6 +38,11 @@ static void pruss_of_free_clk_provider(void *data)
>  	of_node_put(clk_mux_np);
>  }
>  
> +static void pruss_clk_unregister_mux(void *data)
> +{
> +	clk_unregister_mux(data);
> +}
> +
>  static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux,
>  			       char *mux_name, struct device_node *clks_np)
>  {
> @@ -93,8 +98,7 @@ static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux,
>  		goto put_clk_mux_np;
>  	}
>  
> -	ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux,
> -				       clk_mux);
> +	ret = devm_add_action_or_reset(dev, pruss_clk_unregister_mux, clk_mux);
>  	if (ret) {
>  		dev_err(dev, "failed to add clkmux unregister action %d", ret);
>  		goto put_clk_mux_np;
> 
> 
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> From: Simon Horman <horms@kernel.org>
> Date: Tue, 18 Apr 2023 13:41:48 +0200
> Subject: [PATCH] soc: ti: pruss: Avoid cast to incompatible function type
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> To: Nishanth Menon <nm@ti.com>, Santosh Shilimkar <ssantosh@kernel.org>
> Cc: Nathan Chancellor <nathan@kernel.org>, 
>  Nick Desaulniers <ndesaulniers@google.com>, Tom Rix <trix@redhat.com>, 
>  linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
>  llvm@lists.linux.dev, Simon Horman <horms@kernel.org>
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> 
> Rather than casting clk_unregister_mux to an incompatible function
> type provide a trivial wrapper with the correct signature for the
> use-case.
> 
> Reported by clang-16 with W=1:
> 
>  drivers/soc/ti/pruss.c:158:38: error: cast from 'void (*)(struct clk *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
>          ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux,
> 
> No functional change intended.
> Compile tested only.
> 
> Signed-off-by: Simon Horman <horms@kernel.org>

Reviewed-by: MD Danish Anwar <danishanwar@ti.com>

> ---
>  drivers/soc/ti/pruss.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
> index 6882c86b3ce5..e68441bd7b30 100644
> --- a/drivers/soc/ti/pruss.c
> +++ b/drivers/soc/ti/pruss.c
> @@ -38,6 +38,11 @@ static void pruss_of_free_clk_provider(void *data)
>  	of_node_put(clk_mux_np);
>  }
>  
> +static void pruss_clk_unregister_mux(void *data)
> +{
> +	clk_unregister_mux(data);
> +}
> +
>  static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux,
>  			       char *mux_name, struct device_node *clks_np)
>  {
> @@ -93,8 +98,7 @@ static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux,
>  		goto put_clk_mux_np;
>  	}
>  
> -	ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux,
> -				       clk_mux);
> +	ret = devm_add_action_or_reset(dev, pruss_clk_unregister_mux, clk_mux);
>  	if (ret) {
>  		dev_err(dev, "failed to add clkmux unregister action %d", ret);
>  		goto put_clk_mux_np;
> 
> 
> _______________________________________________
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> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

-- 
Thanks and Regards,
Danish.