linux-kernel - Re: [PATCH] ALSA: Don't cold reset AC97 codecs in some ICH chipsets

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Date:	Wed, 28 Jan 2009 10:27:30 -0200
From:	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: Don't cold reset AC97 codecs in some ICH chipsets

On Wed, Jan 28, 2009 at 01:06:20PM +0100, Takashi Iwai wrote:
> At Wed, 28 Jan 2009 08:02:36 -0200,
> Thadeu Lima de Souza Cascardo wrote:
> > 
> > Check in a quirk list if it should do cold reset when AC97 power saving
> > is enabled. Some devices do not resume properly when cold reset,
> > although power saving works OK.
> > 
> > Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
> 
> Thanks for the patch.
> We can go better further with this patch now :)
> 
> The logic is basically fine, but just a few comments...
> 
> > diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
> > index 19d3391..69b3ed8 100644
> > --- a/sound/pci/intel8x0.c
> > +++ b/sound/pci/intel8x0.c
> ...
> > +static int snd_intel8x0_ich_chip_cold_reset(struct intel8x0 *chip)
> > +{
> > +	unsigned int cnt;
> >  	/* ACLink on, 2 channels */
> > +
> > +	if (snd_pci_quirk_lookup(chip->pci, ich_chip_reset_mode))
> > +		return -EIO;
> 
> I feel it isn't intuitive to return -EIO here.
> It'd be more straightforward to call snd_intel8x0_ich_chip_reset()
> from here?
> 
> 	if (snd_pci_quirk_lookup(chip->pci, ich_chip_reset_mode))
> 		return snd_intl8x0_ich_chip_reset(chip);
> 
> 
> > +	if (snd_intel8x0_ich_chip_cold_reset(chip) < 0)
> > +		if ((err = snd_intel8x0_ich_chip_reset(chip)) < 0)
> > +			return err;
> 
> Please make the change checkpatch-clean.
> 
> Could you fix and repost?

I did checkpatch it, but since this style is used in many places in the
intel8x0.c code, I thought I would leave it this way. Should I send a
cleanup patch too?

By the way, I have some very trivial comment typo patches lying around.
I will post them too.

> 
> 
> thanks,
> 
> Takashi

Regards,
Cascardo.

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