linux-kernel - Re: [PATCH -next] gpu: host1x: gr2d drivers/gpu/host1x/drm/gr2d.c: fix error return code in gr2d

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Date:	Wed, 24 Apr 2013 08:38:33 +0200
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Wei Yongjun <weiyj.lk@...il.com>
Cc:	grant.likely@...aro.org, rob.herring@...xeda.com,
	tbergstrom@...dia.com, amerilainen@...dia.com,
	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH -next] gpu: host1x: gr2d drivers/gpu/host1x/drm/gr2d.c:
 fix error return code in gr2d_submit()

On Wed, Apr 24, 2013 at 10:19:27AM +0800, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
> 
> Fix to return a negative error code from the error handling
> case instead of 0, as done elsewhere in this function.
> 
> Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
> ---
>  drivers/gpu/host1x/drm/gr2d.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/host1x/drm/gr2d.c b/drivers/gpu/host1x/drm/gr2d.c
> index 6a45ae0..146cd64 100644
> --- a/drivers/gpu/host1x/drm/gr2d.c
> +++ b/drivers/gpu/host1x/drm/gr2d.c
> @@ -135,8 +135,10 @@ static int gr2d_submit(struct host1x_drm_context *context,
>  			goto fail;
>  
>  		bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
> -		if (!bo)
> +		if (!bo) {
> +			err = -EINVAL;

I think in this case a better error code would be -ENOENT. Other than
that this patch looks good.

Thierry

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