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From: Andy Shevchenko <andy@kernel.org>
To: "Duje Mihanović" <duje.mihanovic@skole.hr>
Cc: Daniel Mack <daniel@zonque.org>,
	Haojian Zhuang <haojian.zhuang@gmail.com>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	Russell King <linux@armlinux.org.uk>,
	Alan Stern <stern@rowland.harvard.edu>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <brgl@bgdev.pl>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-gpio@vger.kernel.org
Subject: Re: [PATCH RFC v2 3/6] ARM: pxa: Convert Spitz CF power control to GPIO descriptors
Date: Wed, 27 Sep 2023 16:46:44 +0300	[thread overview]
Message-ID: <ZRQyREMrfCaDMnI0@smile.fi.intel.com> (raw)
In-Reply-To: <5984688.lOV4Wx5bFT@radijator>

On Wed, Sep 27, 2023 at 02:56:07PM +0200, Duje Mihanović wrote:
> On Tuesday, September 26, 2023 6:15:37 PM CEST Andy Shevchenko wrote:
> > On Tue, Sep 26, 2023 at 05:46:24PM +0200, Duje Mihanović wrote:

...

> > > +	cf_power = gpiod_get(&pxa_device_mci.dev, "cf_power", GPIOD_ASIS);
> > > +	if (IS_ERR(cf_power)) {
> > > +		dev_err(&pxa_device_mci.dev,
> > > +				"failed to get power control GPIO with 
> %ld\n",
> > > +				PTR_ERR(cf_power));
> > > +		return;
> > > +	}
> > > 
> > > +	gpiod_put(cf_power);
> > 
> > Don't you want to use guarded gpiod_get()?
> > Okay, it seems not yet in the pending list, but we can survive without that.
> 
> Can you please elaborate? If I understand correctly, the if statement right 
> after gpiod_get is a guard.

It's about RAII version of the gpiod_get(). It's quite a new thing
in the Linux kernel.

-- 
With Best Regards,
Andy Shevchenko



WARNING: multiple messages have this Message-ID (diff)
From: Andy Shevchenko <andy@kernel.org>
To: "Duje Mihanović" <duje.mihanovic@skole.hr>
Cc: Daniel Mack <daniel@zonque.org>,
	Haojian Zhuang <haojian.zhuang@gmail.com>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	Russell King <linux@armlinux.org.uk>,
	Alan Stern <stern@rowland.harvard.edu>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <brgl@bgdev.pl>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-gpio@vger.kernel.org
Subject: Re: [PATCH RFC v2 3/6] ARM: pxa: Convert Spitz CF power control to GPIO descriptors
Date: Wed, 27 Sep 2023 16:46:44 +0300	[thread overview]
Message-ID: <ZRQyREMrfCaDMnI0@smile.fi.intel.com> (raw)
In-Reply-To: <5984688.lOV4Wx5bFT@radijator>

On Wed, Sep 27, 2023 at 02:56:07PM +0200, Duje Mihanović wrote:
> On Tuesday, September 26, 2023 6:15:37 PM CEST Andy Shevchenko wrote:
> > On Tue, Sep 26, 2023 at 05:46:24PM +0200, Duje Mihanović wrote:

...

> > > +	cf_power = gpiod_get(&pxa_device_mci.dev, "cf_power", GPIOD_ASIS);
> > > +	if (IS_ERR(cf_power)) {
> > > +		dev_err(&pxa_device_mci.dev,
> > > +				"failed to get power control GPIO with 
> %ld\n",
> > > +				PTR_ERR(cf_power));
> > > +		return;
> > > +	}
> > > 
> > > +	gpiod_put(cf_power);
> > 
> > Don't you want to use guarded gpiod_get()?
> > Okay, it seems not yet in the pending list, but we can survive without that.
> 
> Can you please elaborate? If I understand correctly, the if statement right 
> after gpiod_get is a guard.

It's about RAII version of the gpiod_get(). It's quite a new thing
in the Linux kernel.

-- 
With Best Regards,
Andy Shevchenko



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linux-arm-kernel@lists.infradead.org
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  reply	other threads:[~2023-09-27 13:46 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-26 15:46 [PATCH RFC v2 0/6] ARM: pxa: GPIO descriptor conversions Duje Mihanović
2023-09-26 15:46 ` [PATCH RFC v2 1/6] ARM: pxa: Convert Spitz OHCI to GPIO descriptors Duje Mihanović
2023-09-26 16:09   ` Andy Shevchenko
2023-09-26 16:09     ` Andy Shevchenko
2023-09-26 15:46 ` [PATCH RFC v2 2/6] ARM: pxa: Convert Spitz LEDs " Duje Mihanović
2023-09-26 20:21   ` Linus Walleij
2023-09-26 20:21     ` Linus Walleij
2023-09-26 15:46 ` [PATCH RFC v2 3/6] ARM: pxa: Convert Spitz CF power control " Duje Mihanović
2023-09-26 15:46   ` Duje Mihanović
2023-09-26 16:15   ` Andy Shevchenko
2023-09-26 16:15     ` Andy Shevchenko
2023-09-27 12:56     ` Duje Mihanović
2023-09-27 12:56       ` Duje Mihanović
2023-09-27 13:46       ` Andy Shevchenko [this message]
2023-09-27 13:46         ` Andy Shevchenko
2023-09-26 20:26   ` Linus Walleij
2023-09-26 20:26     ` Linus Walleij
2023-09-26 15:46 ` [PATCH RFC v2 4/6] ARM: pxa: Convert reset driver " Duje Mihanović
2023-09-26 16:17   ` Andy Shevchenko
2023-09-26 16:17     ` Andy Shevchenko
2023-09-26 20:26   ` Linus Walleij
2023-09-26 20:26     ` Linus Walleij
2023-09-26 15:46 ` [PATCH RFC v2 5/6] ARM: pxa: Convert Spitz hsync " Duje Mihanović
2023-09-26 16:19   ` Andy Shevchenko
2023-09-26 16:19     ` Andy Shevchenko
2023-09-27 12:54     ` Duje Mihanović
2023-09-27 12:54       ` Duje Mihanović
2023-09-26 15:46 ` [PATCH RFC v2 6/6] ARM: pxa: Convert gumstix Bluetooth " Duje Mihanović
2023-09-26 15:46   ` Duje Mihanović

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