linux-kernel - Re: [PATCH] ASoC: sn95031: Fix the logic to find free channel

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Date:	Sat, 03 Sep 2011 22:38:06 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	"Girdwood, Liam" <lrg@...com>
Cc:	Axel Lin <axel.lin@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Harsha Priya <priya.harsha@...el.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
Subject: Re: [PATCH] ASoC: sn95031: Fix the logic to find free channel

On Sat, 2011-09-03 at 21:44 +0530, Girdwood, Liam wrote:
> 
> 
> On 3 September 2011 06:41, Axel Lin <axel.lin@...il.com> wrote:
>         In the case of no free channel available,
>         current implementation returns 0 instead of negative errno.
>         
>         This patch fixes the logic to return -EINVAL if no free
>         channel available.
>         
>         Signed-off-by: Axel Lin <axel.lin@...il.com>
>         ---
>          sound/soc/codecs/sn95031.c |    8 +++-----
>          1 files changed, 3 insertions(+), 5 deletions(-)
>         
>         diff --git a/sound/soc/codecs/sn95031.c
>         b/sound/soc/codecs/sn95031.c
>         index 84ffdeb..b4f1cb4 100644
>         --- a/sound/soc/codecs/sn95031.c
>         +++ b/sound/soc/codecs/sn95031.c
>         @@ -79,7 +79,7 @@ static void configure_adc(struct
>         snd_soc_codec *sn95031_codec, int val)
>          */
>          static int find_free_channel(struct snd_soc_codec
>         *sn95031_codec)
>          {
>         -       int ret = 0, i, value;
>         +       int i, value;
>         
>                /* check whether ADC is enabled */
>                value = snd_soc_read(sn95031_codec, SN95031_ADC1CNTL1);
>         @@ -91,12 +91,10 @@ static int find_free_channel(struct
>         snd_soc_codec *sn95031_codec)
>                for (i = 0; i < SN95031_ADC_CHANLS_MAX; i++) {
>                        value = snd_soc_read(sn95031_codec,
>                                        SN95031_ADC_CHNL_START_ADDR +
>         i);
>         -               if (value & SN95031_STOPBIT_MASK) {
>         -                       ret = i;
>         +               if (value & SN95031_STOPBIT_MASK)
>                                break;
>         -               }
>                }
>         -       return (ret > SN95031_ADC_LOOP_MAX) ? (-EINVAL) : ret;
>         +       return (i == SN95031_ADC_CHANLS_MAX) ? (-EINVAL) : i;
>          }
>         
>          /* Initialize the ADC for reading micbias values. Can sleep.
>         */
>         --
>         1.7.4.1
>         
>         
>         
> 
> Acked-by: Liam Girdwood <lrg@...com>
> 
> Btw, this should be posted to alsa-devel.
Acked-by: Vinod Koul <vinod.koul@...ux.intel.com>


-- 
~Vinod

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