linux-kernel - Re: [PATCH 1/6] ASoC: fsl_ssi: enable IPG clock during AC'97 reg access

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Message-ID: <55BA415D.4080706@maciej.szmigiero.name>
Date:	Thu, 30 Jul 2015 17:23:09 +0200
From:	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To:	Fabio Estevam <festevam@...il.com>
CC:	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	Timur Tabi <timur@...i.org>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] ASoC: fsl_ssi: enable IPG clock during AC'97 reg
 access

Hi Fabio,

On 30.07.2015 17:20, Fabio Estevam wrote:
> Hi Maciej,
> 
> On Thu, Jul 30, 2015 at 11:33 AM, Maciej S. Szmigiero
> <mail@...iej.szmigiero.name> wrote:
> 
>>  static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
>> @@ -1151,6 +1160,14 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
>>         unsigned short val = -1;
>>         u32 reg_val;
>>         unsigned int lreg;
>> +       int ret;
>> +
>> +       ret = clk_prepare_enable(fsl_ac97_data->clk);
>> +       if (ret) {
>> +               pr_err("ac97 read clk_prepare_enable failed: %d\n",
>> +                       ret);
>> +               return -1;
> 
> return ret, please.
> 

This function normal return value is an AC'97 register value,
so isn't more appropriate to return 0xffff in case of error
than linux error code?

Best regards,
Maciej Szmigiero

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