linux-kernel - Re: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with less than zero

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Date:   Fri, 7 Jun 2019 11:41:46 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Colin King <colin.king@...onical.com>, Jyri Sarha <jsarha@...com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with
 less than zero

On 03.06.2019 16:21, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
>
> The less than check for the variable num_lanes is always going to be
> false because the variable is a u32.  Fix this by making num_lanes an
> int and also make loop index i an int too.
>
> Addresses-Coverity: ("Unsigned compared against 0")


Is there a rule in Kernel of adding such tags?

I have spotted only: Addresses-Coverity-ID?


Beside this:

Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

 --
Regards
Andrzej


> Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/gpu/drm/bridge/sii902x.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index d6f98d388ac2..21a947603c88 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -719,7 +719,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
>  		.max_i2s_channels = 0,
>  	};
>  	u8 lanes[4];
> -	u32 num_lanes, i;
> +	int num_lanes, i;
>  
>  	if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
>  		dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",