linux-kernel - Re: [PATCH 05/11] mfd: twl6040: use devm_gpio_request_one() and devm_request_threaded

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Message-id: <000b01ce0f41$8a99a8e0$9fccfaa0$%han@samsung.com>
Date:	Wed, 20 Feb 2013 17:09:01 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Dmitry Torokhov' <dmitry.torokhov@...il.com>
Cc:	'Samuel Ortiz' <sameo@...ux.intel.com>,
	linux-kernel@...r.kernel.org, 'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCH 05/11] mfd: twl6040: use devm_gpio_request_one() and
 devm_request_threaded_irq()

On Wednesday, February 20, 2013 4:37 PM, Dmitry Torokhov wrote:
> 
> Hi Jingoo,
> 
> On Wed, Feb 20, 2013 at 03:11:38PM +0900, Jingoo Han wrote:
> > Use devm_gpio_request_one() and devm_request_threaded_irq() to make
> > cleanup paths and  more simple.
> >
> > Signed-off-by: Jingoo Han <jg1.han@...sung.com>
> > ---
> >  drivers/mfd/twl6040.c |   26 +++++++-------------------
> >  1 files changed, 7 insertions(+), 19 deletions(-)
> >
> > diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
> > index f361bf3..2d38512 100644
> > --- a/drivers/mfd/twl6040.c
> > +++ b/drivers/mfd/twl6040.c
> > @@ -586,8 +586,8 @@ static int twl6040_probe(struct i2c_client *client,
> >  		twl6040->audpwron = -EINVAL;
> >
> >  	if (gpio_is_valid(twl6040->audpwron)) {
> > -		ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
> > -				       "audpwron");
> > +		ret = devm_gpio_request_one(twl6040->dev, twl6040->audpwron,
> > +					GPIOF_OUT_INIT_LOW, "audpwron");
> >  		if (ret)
> >  			goto gpio_err;
> >  	}
> > @@ -596,14 +596,14 @@ static int twl6040_probe(struct i2c_client *client,
> >  			IRQF_ONESHOT, 0, &twl6040_irq_chip,
> >  			&twl6040->irq_data);
> >  	if (ret < 0)
> > -		goto irq_init_err;
> > +		goto gpio_err;
> >
> >  	twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
> >  					       TWL6040_IRQ_READY);
> >  	twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
> >  					       TWL6040_IRQ_TH);
> >
> > -	ret = request_threaded_irq(twl6040->irq_ready, NULL,
> > +	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
> >  				   twl6040_readyint_handler, IRQF_ONESHOT,
> >  				   "twl6040_irq_ready", twl6040);
> >  	if (ret) {
> > @@ -611,12 +611,12 @@ static int twl6040_probe(struct i2c_client *client,
> >  		goto readyirq_err;
> >  	}
> >
> > -	ret = request_threaded_irq(twl6040->irq_th, NULL,
> > +	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
> >  				   twl6040_thint_handler, IRQF_ONESHOT,
> >  				   "twl6040_irq_th", twl6040);
> >  	if (ret) {
> >  		dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
> > -		goto thirq_err;
> > +		goto readyirq_err;
> >  	}
> >
> >  	/* dual-access registers controlled by I2C only */
> > @@ -676,19 +676,12 @@ static int twl6040_probe(struct i2c_client *client,
> >  	ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
> >  			      NULL, 0, NULL);
> >  	if (ret)
> > -		goto mfd_err;
> > +		goto readyirq_err;
> >
> >  	return 0;
> >
> > -mfd_err:
> > -	free_irq(twl6040->irq_th, twl6040);
> > -thirq_err:
> > -	free_irq(twl6040->irq_ready, twl6040);
> >  readyirq_err:
> >  	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
> > -irq_init_err:
> > -	if (gpio_is_valid(twl6040->audpwron))
> > -		gpio_free(twl6040->audpwron);
> >  gpio_err:
> >  	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
> >  power_err:
> > @@ -706,11 +699,6 @@ static int twl6040_remove(struct i2c_client *client)
> >  	if (twl6040->power_count)
> >  		twl6040_power(twl6040, 0);
> >
> > -	if (gpio_is_valid(twl6040->audpwron))
> > -		gpio_free(twl6040->audpwron);
> > -
> > -	free_irq(twl6040->irq_ready, twl6040);
> > -	free_irq(twl6040->irq_th, twl6040);
> >  	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
> >
> >  	mfd_remove_devices(&client->dev);
> 
> Are you sure it is OK to have sub-devices removed and regmap destroyed
> with IRQs still active?

Yes, you're right. 
I will use devm_free_irq().

> 
> Thanks.
> 
> --
> Dmitry

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