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

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Date:   Mon, 3 Jun 2019 19:00:01 +0300
From:   Jyri Sarha <jsarha@...com>
To:     Colin King <colin.king@...onical.com>,
        Andrzej Hajda <a.hajda@...sung.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 17:21, 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")
> Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Oh, one of these slipped trough after all.

Acked-by: Jyri Sarha <jsarha@...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",
> 


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