linux-kernel - Re: ALSA: intel8x0: div by zero in snd_intel8x0

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Date:   Sun, 16 May 2021 17:30:57 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Leon Romanovsky <leon@...nel.org>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: ALSA: intel8x0: div by zero in snd_intel8x0_update()

On (21/05/14 20:16), Sergey Senozhatsky wrote:
> > --- a/sound/pci/intel8x0.c
> > +++ b/sound/pci/intel8x0.c
> > @@ -691,6 +691,9 @@ static inline void snd_intel8x0_update(struct intel8x0 *chip, struct ichdev *ich
> >  	int status, civ, i, step;
> >  	int ack = 0;
> >  
> > +	if (!ichdev->substream || ichdev->suspended)
> > +		return;
> > +
> >  	spin_lock_irqsave(&chip->reg_lock, flags);
> >  	status = igetbyte(chip, port + ichdev->roff_sr);
> >  	civ = igetbyte(chip, port + ICH_REG_OFF_CIV);

This does the problem for me.