linux-kernel - [PATCH v2 2/2] gpiolib: Switch to use for_each

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Message-ID: <20250213182527.3092371-3-andriy.shevchenko@linux.intel.com>
Date: Thu, 13 Feb 2025 20:24:01 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Alexandru Ardelean <aardelean@...libre.com>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH v2 2/2] gpiolib: Switch to use for_each_if() helper

The for_each_*() APIs that are conditional can be written shorter and
less error prone with for_each_if() helper in use. Switch them to use
this helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/gpio/driver.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index ae93f75170f2..af046f7fd4f5 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -14,6 +14,7 @@
 #include <linux/property.h>
 #include <linux/spinlock_types.h>
 #include <linux/types.h>
+#include <linux/util_macros.h>
 
 #ifdef CONFIG_GENERIC_MSI_IRQ
 #include <asm/msi.h>
@@ -561,7 +562,7 @@ DEFINE_CLASS(_gpiochip_for_each_data,
 	for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i);			\
 	     _i < _size;								\
 	     _i++, kfree(_label), _label = NULL)					\
-		if (IS_ERR(_label = gpiochip_dup_line_label(_chip, _base + _i))) {} else
+		for_each_if(!IS_ERR(_label = gpiochip_dup_line_label(_chip, _base + _i)))
 
 /**
  * for_each_hwgpio - Iterates over all GPIOs for given chip.
@@ -583,7 +584,7 @@ DEFINE_CLASS(_gpiochip_for_each_data,
  */
 #define for_each_requested_gpio_in_range(_chip, _i, _base, _size, _label)		\
 	for_each_hwgpio_in_range(_chip, _i, _base, _size, _label)			\
-		if (_label == NULL) {} else
+		for_each_if(_label)
 
 /* Iterates over all requested GPIO of the given @chip */
 #define for_each_requested_gpio(chip, i, label)						\
@@ -869,7 +870,7 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc,
 
 #define for_each_gpiochip_node(dev, child)					\
 	device_for_each_child_node(dev, child)					\
-		if (!fwnode_property_present(child, "gpio-controller")) {} else
+		for_each_if(fwnode_property_present(child, "gpio-controller"))
 
 static inline unsigned int gpiochip_node_count(struct device *dev)
 {
-- 
2.45.1.3035.g276e886db78b