linux-kernel - Re: [PATCH -next] gpu: host1x: simplify the return expression of host1x_cdma

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Date:   Mon, 21 Sep 2020 16:12:20 +0300
From:   Mikko Perttunen <cyndis@...si.fi>
To:     Qinglang Miao <miaoqinglang@...wei.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] gpu: host1x: simplify the return expression of
 host1x_cdma_init()

On 9/21/20 4:10 PM, Qinglang Miao wrote:
> Simplify the return expression.
> 
> Signed-off-by: Qinglang Miao <miaoqinglang@...wei.com>
> ---
>   drivers/gpu/host1x/cdma.c | 8 +-------
>   1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
> index e8d3fda91..08a0f9e10 100644
> --- a/drivers/gpu/host1x/cdma.c
> +++ b/drivers/gpu/host1x/cdma.c
> @@ -448,8 +448,6 @@ void host1x_cdma_update_sync_queue(struct host1x_cdma *cdma,
>    */
>   int host1x_cdma_init(struct host1x_cdma *cdma)
>   {
> -	int err;
> -
>   	mutex_init(&cdma->lock);
>   	init_completion(&cdma->complete);
>   
> @@ -459,11 +457,7 @@ int host1x_cdma_init(struct host1x_cdma *cdma)
>   	cdma->running = false;
>   	cdma->torndown = false;
>   
> -	err = host1x_pushbuffer_init(&cdma->push_buffer);
> -	if (err)
> -		return err;
> -
> -	return 0;
> +	return host1x_pushbuffer_init(&cdma->push_buffer);

IMHO, this makes it less readable since now it kind of looks like 
host1x_pushbuffer_init is returning some meaningful value, instead of 
the code just handling error values in a sequence.

Mikko

>   }
>   
>   /*
>