[alsa-devel] [patch] USB: 6fire: signedness bug in usb6fire_pcm_prepare()

[Takashi Iwai]

At Mon, 7 Feb 2011 20:25:19 +0300,
Dan Carpenter wrote:
> 
> rt->rate is an unsigned char so it's never equal to -1.  It's not a huge
> problem because the invalid rate is caught inside the call to
> usb6fire_pcm_set_rate() which returns -EINVAL.  But if we fix the test
> then it prints out the correct error message so that's good.
> 
> Signed-off-by: Dan Carpenter <error27 at gmail.com>

Applied now.  Thanks.


Takashi

> diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
> index 705c88e..ba62c74 100644
> --- a/sound/usb/6fire/pcm.c
> +++ b/sound/usb/6fire/pcm.c
> @@ -493,13 +493,12 @@ static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
>  	sub->period_off = 0;
>  
>  	if (rt->stream_state == STREAM_DISABLED) {
> -		rt->rate = -1;
>  		for (i = 0; i < ARRAY_SIZE(rates); i++)
>  			if (alsa_rt->rate == rates[i]) {
>  				rt->rate = i;
>  				break;
>  			}
> -		if (rt->rate == -1) {
> +		if (i == ARRAY_SIZE(rates)) {
>  			mutex_unlock(&rt->stream_mutex);
>  			snd_printk("invalid rate %d in prepare.\n",
>  					alsa_rt->rate);
>