Re: [PATCH] drm/rockchip/dsi: fix handling mipi_dsi_pixel_format_to_bpp result

From: Mark yao <mark.yao@rock-chips.com>
To: Andrzej Hajda <a.hajda@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	list@263.net,
	DRM DRIVERS FOR ROCKCHIP <dri-devel@lists.freedesktop.org>,
	ARM/Rockchip SoC support <linux-rockchip@lists.infradead.org>,
	open@263.net, Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCH] drm/rockchip/dsi: fix handling mipi_dsi_pixel_format_to_bpp result
Date: Mon, 18 Jan 2016 08:46:10 +0800	[thread overview]
Message-ID: <569C35D2.5060709@rock-chips.com> (raw)
In-Reply-To: <1452761942-23864-1-git-send-email-a.hajda@samsung.com>

On 2016年01月14日 16:59, Andrzej Hajda wrote:
> The function can return negative value so it should be assigned to signed
> variable.
>
> The problem has been detected using patch
> scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci.
>
> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
> ---
>   drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 7bfe243..f8f8f29 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -461,10 +461,11 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>   
>   static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi)
>   {
> -	unsigned int bpp, i, pre;
> +	unsigned int i, pre;
>   	unsigned long mpclk, pllref, tmp;
>   	unsigned int m = 1, n = 1, target_mbps = 1000;
>   	unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
> +	int bpp;
>   
>   	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
>   	if (bpp < 0) {

Looks good for me, Applied to my drm-next branch. :-)

Thanks.

-- 
Ｍark Yao

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