Re: [PATCH] gpu: host1x: Remove redundant null checks before kfree

[Mikko Perttunen]

On 12/1/22 03:55, zys.zljxml@xxxxxxxxx wrote:
> From: Yushan Zhou <katrinzhou@xxxxxxxxxxx>
>
> Fix the following coccicheck warning:
> ./drivers/gpu/host1x/fence.c:97:2-7: WARNING:
> NULL check before some freeing functions is not needed.
>
> Signed-off-by: Yushan Zhou <katrinzhou@xxxxxxxxxxx>
> ---
>   drivers/gpu/host1x/fence.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/host1x/fence.c b/drivers/gpu/host1x/fence.c
> index ecab72882192..05b36bfc8b74 100644
> --- a/drivers/gpu/host1x/fence.c
> +++ b/drivers/gpu/host1x/fence.c
> @@ -93,8 +93,7 @@ static void host1x_syncpt_fence_release(struct dma_fence *f)
>   {
>   	struct host1x_syncpt_fence *sf = to_host1x_fence(f);
>   
> -	if (sf->waiter)
> -		kfree(sf->waiter);
> +	kfree(sf->waiter);
>   
>   	dma_fence_free(f);
>   }

I disagree with this coccinelle rule; I think it obfuscates from the 
reader the fact that the pointer could be NULL.

Mikko