Re: [PATCH] watchdog: armada_37xx_wdt: check the return value of devm_ioremap() in armada_37xx_wdt_probe()

[Guenter Roeck]

On 7/21/22 20:09, williamsukatube@xxxxxxx wrote:
> From: William Dean <williamsukatube@xxxxxxxxx>
>
> The function devm_ioremap() in armada_37xx_wdt_probe() can fail, so
> its return value should be checked.
>
> Fixes: 54e3d9b518c8a ("watchdog: Add support for Armada 37xx CPU watchdog")
> Reported-by: Hacash Robot <hacashRobot@xxxxxxxxxxx>
> Signed-off-by: William Dean <williamsukatube@xxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
>   drivers/watchdog/armada_37xx_wdt.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/watchdog/armada_37xx_wdt.c b/drivers/watchdog/armada_37xx_wdt.c
> index 1635f421ef2c..854b1cc723cb 100644
> --- a/drivers/watchdog/armada_37xx_wdt.c
> +++ b/drivers/watchdog/armada_37xx_wdt.c
> @@ -274,6 +274,8 @@ static int armada_37xx_wdt_probe(struct platform_device *pdev)
>   	if (!res)
>   		return -ENODEV;
>   	dev->reg = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> +	if (!dev->reg)
> +		return -ENOMEM;
>   
>   	/* init clock */
>   	dev->clk = devm_clk_get(&pdev->dev, NULL);