linux-kernel - RE: [PATCH] mailbox: imx: Fix an IS

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Date:   Thu, 25 Nov 2021 00:27:40 +0000
From:   Peng Fan <peng.fan@....com>
To:     Dan Carpenter <dan.carpenter@...cle.com>,
        Jassi Brar <jassisinghbrar@...il.com>
CC:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH] mailbox: imx: Fix an IS_ERR() vs NULL bug

> Subject: [PATCH] mailbox: imx: Fix an IS_ERR() vs NULL bug
> 
> The devm_kzalloc() function does not return error pointers, it returns NULL on
> failure.
> 
> Fixes: 97961f78e8bc ("mailbox: imx: support i.MX8ULP S4 MU")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Reviewed-by: Peng Fan <peng.fan@....com>

> ---
>  drivers/mailbox/imx-mailbox.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
> index ffe36a6bef9e..544de2db6453 100644
> --- a/drivers/mailbox/imx-mailbox.c
> +++ b/drivers/mailbox/imx-mailbox.c
> @@ -563,8 +563,8 @@ static int imx_mu_probe(struct platform_device
> *pdev)
>  		size = sizeof(struct imx_sc_rpc_msg_max);
> 
>  	priv->msg = devm_kzalloc(dev, size, GFP_KERNEL);
> -	if (IS_ERR(priv->msg))
> -		return PTR_ERR(priv->msg);
> +	if (!priv->msg)
> +		return -ENOMEM;
> 
>  	priv->clk = devm_clk_get(dev, NULL);
>  	if (IS_ERR(priv->clk)) {
> --
> 2.20.1