linux-kernel - Re: [PATCH 1/7] Input: pmic8xxx-pwrkey - Pass input device directly to interrupt

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Message-ID: <20131216195910.GQ21983@codeaurora.org>
Date:	Mon, 16 Dec 2013 11:59:10 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-input@...r.kernel.org
Subject: Re: [PATCH 1/7] Input: pmic8xxx-pwrkey - Pass input device
 directly to interrupt

On 12/15, Dmitry Torokhov wrote:
> Hi Stephen,
> 
> On Tue, Dec 10, 2013 at 03:43:10PM -0800, Stephen Boyd wrote:
> > Instead of passing the pointer to the container structure just
> > pass the input device here. This saves a dereference in the fast
> > path.
> > 
> > Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> > ---
> >  drivers/input/misc/pmic8xxx-pwrkey.c | 22 ++++++++--------------
> >  1 file changed, 8 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/input/misc/pmic8xxx-pwrkey.c b/drivers/input/misc/pmic8xxx-pwrkey.c
> > index ce3c426..233b216 100644
> > --- a/drivers/input/misc/pmic8xxx-pwrkey.c
> > +++ b/drivers/input/misc/pmic8xxx-pwrkey.c
> > @@ -32,26 +32,21 @@
> >   * @key_press_irq: key press irq number
> >   */
> >  struct pmic8xxx_pwrkey {
> > -	struct input_dev *pwr;
> 
> This causes compile errors as you need pwrkey->pwr in remove() to
> unregister input device. I'll fix it up.
> 

Ah sorry. I forgot to send the patch before this that converts it
to devm.

> >  	err = devm_request_irq(&pdev->dev, key_press_irq, pwrkey_press_irq,
> > -		IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_press", pwrkey);
> > +		IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_press", pwr);

As you can see here because this driver isn't currently using
devm_request_irq().

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