linux-kernel - Re: [alsa-devel] [PATCH] sound: soc: codecs: wcd9335: add irqflag IRQF_ONESHOT flag

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Message-ID: <20190710020208.GA12600@hari-Inspiron-1545>
Date:   Wed, 10 Jul 2019 07:32:08 +0530
From:   Hariprasad Kelam <hariprasad.kelam@...il.com>
To:     Ladislav Michl <ladis@...ux-mips.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Gen Zhang <blackgod016574@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] sound: soc: codecs: wcd9335: add irqflag
 IRQF_ONESHOT flag

On Fri, Jul 05, 2019 at 10:10:06PM +0200, Ladislav Michl wrote:
> On Fri, Jul 05, 2019 at 12:40:26AM +0530, Hariprasad Kelam wrote:
> > Add IRQF_ONESHOT to ensure "Interrupt is not reenabled after the hardirq
> > handler finished".
> > 
> > fixes below issue reported by coccicheck
> > 
> > sound/soc/codecs/wcd9335.c:4068:8-33: ERROR: Threaded IRQ with no
> > primary handler requested without IRQF_ONESHOT
> > 
> > Signed-off-by: Hariprasad Kelam <hariprasad.kelam@...il.com>
> > ---
> >  sound/soc/codecs/wcd9335.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
> > index 85737fe..7ab9bf6f 100644
> > --- a/sound/soc/codecs/wcd9335.c
> > +++ b/sound/soc/codecs/wcd9335.c
> > @@ -4056,6 +4056,9 @@ static struct wcd9335_irq wcd9335_irqs[] = {
> >  static int wcd9335_setup_irqs(struct wcd9335_codec *wcd)
> >  {
> >  	int irq, ret, i;
> > +	unsigned long irqflags;
> > +
> > +	irqflags = IRQF_TRIGGER_RISING | IRQF_ONESHOT;
> 
> Why does this change trigger adding a variable?
Yes variable is not required. Will resend the patch without variable.
> 
> >  	for (i = 0; i < ARRAY_SIZE(wcd9335_irqs); i++) {
> >  		irq = regmap_irq_get_virq(wcd->irq_data, wcd9335_irqs[i].irq);
> > @@ -4067,7 +4070,7 @@ static int wcd9335_setup_irqs(struct wcd9335_codec *wcd)
> >  
> >  		ret = devm_request_threaded_irq(wcd->dev, irq, NULL,
> >  						wcd9335_irqs[i].handler,
> > -						IRQF_TRIGGER_RISING,
> > +						irqflags,
> >  						wcd9335_irqs[i].name, wcd);
> >  		if (ret) {
> >  			dev_err(wcd->dev, "Failed to request %s\n",
> > -- 
> > 2.7.4
> > 
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel@...a-project.org
> > https://mailman.alsa-project.org/mailman/listinfo/alsa-devel

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