linux-kernel - Re: [PATCH] drm: An uninitialized return value is returned.

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Message-ID: <CAO6yer+0zUNFVGW8wO2mdSQodzzaw2WsRQHVmUAs1Xr_FHXx3Q@mail.gmail.com>
Date:	Sun, 3 Jun 2012 20:26:00 +0800
From:	bing deng <deng8bing@...il.com>
To:	Il Han <corone.il.han@...il.com>
Cc:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: An uninitialized return value is returned.

On Sun, Jun 3, 2012 at 6:41 PM, Il Han <corone.il.han@...il.com> wrote:
> An uninitialized return value is returned.
> If the value is not necessary,
> it would be better to return the constant 0.
>
> Signed-off-by: Il Han <corone.il.han@...il.com>
> ---
>  drivers/gpu/drm/nouveau/nv04_fence.c |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c b/drivers/gpu/drm/nouveau/nv04_fence.c
> index abe89db..d4091eb 100644
> --- a/drivers/gpu/drm/nouveau/nv04_fence.c
> +++ b/drivers/gpu/drm/nouveau/nv04_fence.c
> @@ -121,7 +121,6 @@ nv04_fence_create(struct drm_device *dev)
>  {
>        struct drm_nouveau_private *dev_priv = dev->dev_private;
>        struct nv04_fence_priv *priv;
> -       int ret;
>
>        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
>        if (!priv)
> @@ -136,5 +135,5 @@ nv04_fence_create(struct drm_device *dev)
>        priv->base.sync = nv04_fence_sync;
>        priv->base.read = nv04_fence_read;
>        dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine;
> -       return ret;
> +       return 0;
>  }
> --
> 1.7.4.1
>
> --
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Hi All,

    Why not modify "int ret;" to "int ret = 0;"? Below is the benefit:
    1. return the constant 0 as wish.
    2. The variable ret can be used if we want.
-- 
Best Regards,
Bing
--
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