[alsa-devel] [PATCH 4/4] topology: Fix comparison of unsigned expression < 0

[Takashi Iwai]

On Wed, 18 Nov 2015 08:23:59 +0100,
mengdong.lin at linux.intel.com wrote:
> 
> From: Mengdong Lin <mengdong.lin at linux.intel.com>
> 
> Fix gcc warning: comparison of unsigned expression < 0 is always false
> [-Wtype-limits]
> 
> The ABI object channel->id is _le32 and is converted to host unsigned
> integer. It cannot be < 0.
> 
> Signed-off-by: Mengdong Lin <mengdong.lin at linux.intel.com>

Applied, thanks.


Takashi

> 
> diff --git a/src/topology/channel.c b/src/topology/channel.c
> index 9bc5d5a..c2f1fea 100644
> --- a/src/topology/channel.c
> +++ b/src/topology/channel.c
> @@ -80,6 +80,7 @@ int tplg_parse_channel(snd_tplg_t *tplg,
>  	snd_config_t *n;
>  	struct snd_soc_tplg_channel *channel = private;
>  	const char *id, *value;
> +	int channel_id;
>  
>  	if (tplg->channel_idx >= SND_SOC_TPLG_MAX_CHAN)
>  		return -EINVAL;
> @@ -88,12 +89,13 @@ int tplg_parse_channel(snd_tplg_t *tplg,
>  	snd_config_get_id(cfg, &id);
>  	tplg_dbg("\tChannel %s at index %d\n", id, tplg->channel_idx);
>  
> -	channel->id = lookup_channel(id);
> -	if (channel->id < 0) {
> +	channel_id = lookup_channel(id);
> +	if (channel_id < 0) {
>  		SNDERR("error: invalid channel %s\n", id);
>  		return -EINVAL;
>  	}
>  
> +	channel->id = channel_id;
>  	channel->size = sizeof(*channel);
>  	tplg_dbg("\tChan %s = %d\n", id, channel->id);
>  
> -- 
> 2.5.0
>