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Date: Wed, 16 Apr 2008 18:31:38 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Roel Kluin <12o3l@...cali.nl>
Cc: perex@...ex.cz, alsa-devel@...a-project.org,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH 6/6] sound/drivers/dummy.c: fix negative snd_pcm_format_width() check
At Wed, 16 Apr 2008 18:20:33 +0200,
Roel Kluin wrote:
>
> bps is unsigned, a negative snd_pcm_format_width() return value is not noticed
>
> Signed-off-by: Roel Kluin <12o3l@...cali.nl>
Applied to ALSA tree. Thanks.
Takashi
> ---
> diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
> index a240eae..1c88977 100644
> --- a/sound/drivers/dummy.c
> +++ b/sound/drivers/dummy.c
> @@ -230,13 +230,14 @@ static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
> {
> struct snd_pcm_runtime *runtime = substream->runtime;
> struct snd_dummy_pcm *dpcm = runtime->private_data;
> - unsigned int bps;
> + int bps;
> +
> + bps = snd_pcm_format_width(runtime->format) * runtime->rate *
> + runtime->channels / 8;
>
> - bps = runtime->rate * runtime->channels;
> - bps *= snd_pcm_format_width(runtime->format);
> - bps /= 8;
> if (bps <= 0)
> return -EINVAL;
> +
> dpcm->pcm_bps = bps;
> dpcm->pcm_jiffie = bps / HZ;
> dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@...a-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
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