Re: [PATCH v2 06/14] media: staging: rkisp1: params: in the isr, return if buffer list is empty

[Helen Koike <helen.koike@xxxxxxxxxxxxx>]

On 8/15/20 7:37 AM, Dafna Hirschfeld wrote:
> Currently the code in the isr checks if the buffer list is not
> empty before referencing a buffer and then check again if the
> buffer is not NULL. Instead we can save one 'if' statement by
> returning if the buffers list is empty.
> Also remove non-helpful inline doc 'get one empty buffer'
> 
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>

Acked-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>

Thanks
Helen

> ---
>  drivers/staging/media/rkisp1/rkisp1-params.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/media/rkisp1/rkisp1-params.c b/drivers/staging/media/rkisp1/rkisp1-params.c
> index 6a76c586e916..86bbd01e18c7 100644
> --- a/drivers/staging/media/rkisp1/rkisp1-params.c
> +++ b/drivers/staging/media/rkisp1/rkisp1-params.c
> @@ -1206,16 +1206,14 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1)
>  		return;
>  	}
>  
> -	/* get one empty buffer */
> -	if (!list_empty(&params->params))
> -		cur_buf = list_first_entry(&params->params,
> -					   struct rkisp1_buffer, queue);
> -
> -	if (!cur_buf) {
> +	if (list_empty(&params->params)) {
>  		spin_unlock(&params->config_lock);
>  		return;
>  	}
>  
> +	cur_buf = list_first_entry(&params->params,
> +				   struct rkisp1_buffer, queue);
> +
>  	new_params = (struct rkisp1_params_cfg *)(cur_buf->vaddr[0]);
>  
>  	rkisp1_isp_isr_other_config(params, new_params);
>