linux-kernel - Re: [PATCH] drm/gma500: Fix error return code in psb_driver

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Date:   Mon, 30 Nov 2020 15:32:41 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     Jialin Zhang <zhangjialin11@...wei.com>
Cc:     Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Alan Cox <alan@...ux.intel.com>,
        Dave Airlie <airlied@...hat.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        huawei.libin@...wei.com
Subject: Re: [PATCH] drm/gma500: Fix error return code in psb_driver_load()

On Mon, Nov 30, 2020 at 10:02:16AM +0800, Jialin Zhang wrote:
> Fix to return a negative error code from the error handling
> case instead of 0, as done elsewhere in this function.
> 
> Fixes: 5c49fd3aa0ab ("gma500: Add the core DRM files and headers")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Jialin Zhang <zhangjialin11@...wei.com>

Out of curiosity, what is hulk robot matching here? This is a really
interesting bug for automated checkers to find!

Thanks for the patch, applied to drm-misc-next.
-Daniel

> ---
>  drivers/gpu/drm/gma500/psb_drv.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
> index 34b4aae9a15e..074f403d7ca0 100644
> --- a/drivers/gpu/drm/gma500/psb_drv.c
> +++ b/drivers/gpu/drm/gma500/psb_drv.c
> @@ -313,6 +313,8 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
>  	if (ret)
>  		goto out_err;
>  
> +	ret = -ENOMEM;
> +
>  	dev_priv->mmu = psb_mmu_driver_init(dev, 1, 0, 0);
>  	if (!dev_priv->mmu)
>  		goto out_err;
> -- 
> 2.25.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch