Re: [PATCH] slimbus: qcom: fix error check return value of platform_get_irq()

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

On 12/04/2022 10:02, cgel.zte@gmail.com wrote:
> From: Lv Ruyi <lv.ruyi@zte.com.cn>
> 
> platform_get_irq() return negative value on failure, so null check of
> ctrl->irq is incorrect. Fix it by comparing whether it is less than zero.
> 
> Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver")
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>


There was already a patch posted to fix this

 
https://git.kernel.org/pub/scm/linux/kernel/git/srini/slimbus.git/commit/?h=for-next&id=54bf672111eef18819fa6e562f68b2d6c449b05d

--srini
> ---
>   drivers/slimbus/qcom-ctrl.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
> index f04b961b96cd..b2f01e155d77 100644
> --- a/drivers/slimbus/qcom-ctrl.c
> +++ b/drivers/slimbus/qcom-ctrl.c
> @@ -510,7 +510,7 @@ static int qcom_slim_probe(struct platform_device *pdev)
>   	}
>   
>   	ctrl->irq = platform_get_irq(pdev, 0);
> -	if (!ctrl->irq) {
> +	if (ctrl->irq < 0) {
>   		dev_err(&pdev->dev, "no slimbus IRQ\n");
>   		return -ENODEV;
>   	}