[PATCH] media: rkisp1: Make local immutable array variables static const

[PATCH] media: rkisp1: Make local immutable array variables static const

[Laurent Pinchart]

The max_widths and max_heights variables in rkisp1_try_fmt() are
immutable and don't need to be allocated on the stack every time the
function is called. Make them static.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 .../media/platform/rockchip/rkisp1/rkisp1-capture.c  | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index ef3c9389d684..81177ad08cf0 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -1162,13 +1162,17 @@ static void rkisp1_try_fmt(const struct rkisp1_capture *cap,
 			   const struct rkisp1_capture_fmt_cfg **fmt_cfg,
 			   const struct v4l2_format_info **fmt_info)
 {
+	static const unsigned int max_widths[] = {
+		RKISP1_RSZ_MP_SRC_MAX_WIDTH,
+		RKISP1_RSZ_SP_SRC_MAX_WIDTH,
+	};
+	static const unsigned int max_heights[] = {
+		RKISP1_RSZ_MP_SRC_MAX_HEIGHT,
+		RKISP1_RSZ_SP_SRC_MAX_HEIGHT,
+	};
 	const struct rkisp1_capture_config *config = cap->config;
 	const struct rkisp1_capture_fmt_cfg *fmt;
 	const struct v4l2_format_info *info;
-	const unsigned int max_widths[] = { RKISP1_RSZ_MP_SRC_MAX_WIDTH,
-					    RKISP1_RSZ_SP_SRC_MAX_WIDTH };
-	const unsigned int max_heights[] = { RKISP1_RSZ_MP_SRC_MAX_HEIGHT,
-					     RKISP1_RSZ_SP_SRC_MAX_HEIGHT};
 
 	fmt = rkisp1_find_fmt_cfg(cap, pixm->pixelformat);
 	if (!fmt) {
-- 
Regards,

Laurent Pinchart


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Re: [PATCH] media: rkisp1: Make local immutable array variables static const

[paul.elder]

On Thu, Jul 21, 2022 at 09:57:06AM +0300, Laurent Pinchart wrote:
> The max_widths and max_heights variables in rkisp1_try_fmt() are
> immutable and don't need to be allocated on the stack every time the
> function is called. Make them static.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

> ---
>  .../media/platform/rockchip/rkisp1/rkisp1-capture.c  | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> index ef3c9389d684..81177ad08cf0 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> @@ -1162,13 +1162,17 @@ static void rkisp1_try_fmt(const struct rkisp1_capture *cap,
>  			   const struct rkisp1_capture_fmt_cfg **fmt_cfg,
>  			   const struct v4l2_format_info **fmt_info)
>  {
> +	static const unsigned int max_widths[] = {
> +		RKISP1_RSZ_MP_SRC_MAX_WIDTH,
> +		RKISP1_RSZ_SP_SRC_MAX_WIDTH,
> +	};
> +	static const unsigned int max_heights[] = {
> +		RKISP1_RSZ_MP_SRC_MAX_HEIGHT,
> +		RKISP1_RSZ_SP_SRC_MAX_HEIGHT,
> +	};
>  	const struct rkisp1_capture_config *config = cap->config;
>  	const struct rkisp1_capture_fmt_cfg *fmt;
>  	const struct v4l2_format_info *info;
> -	const unsigned int max_widths[] = { RKISP1_RSZ_MP_SRC_MAX_WIDTH,
> -					    RKISP1_RSZ_SP_SRC_MAX_WIDTH };
> -	const unsigned int max_heights[] = { RKISP1_RSZ_MP_SRC_MAX_HEIGHT,
> -					     RKISP1_RSZ_SP_SRC_MAX_HEIGHT};
>  
>  	fmt = rkisp1_find_fmt_cfg(cap, pixm->pixelformat);
>  	if (!fmt) {

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