linux-kernel - [PATCH v2 46/62] pinctrl: change the signature of pinctrl_ready_for_gpio

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231011120830.49324-47-brgl@bgdev.pl>
Date:   Wed, 11 Oct 2023 14:08:14 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2 46/62] pinctrl: change the signature of pinctrl_ready_for_gpio_range()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Modify pinctrl_ready_for_gpio_range() to be in line with public GPIO
helpers and take a pair of GPIO chip & offset as arguments

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/pinctrl/core.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 89df934d65bc..e3da8aeee01d 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -322,7 +322,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, struct gpio_chip *gc,
 /**
  * pinctrl_ready_for_gpio_range() - check if other GPIO pins of
  * the same GPIO chip are in range
- * @gpio: gpio pin to check taken from the global GPIO pin space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
  *
  * This function is complement of pinctrl_match_gpio_range(). If the return
  * value of pinctrl_match_gpio_range() is NULL, this function could be used
@@ -333,19 +334,11 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, struct gpio_chip *gc,
  * is false, it means that pinctrl device may not be ready.
  */
 #ifdef CONFIG_GPIOLIB
-static bool pinctrl_ready_for_gpio_range(unsigned gpio)
+static bool pinctrl_ready_for_gpio_range(struct gpio_chip *gc,
+					 unsigned int offset)
 {
 	struct pinctrl_dev *pctldev;
 	struct pinctrl_gpio_range *range = NULL;
-	/*
-	 * FIXME: "gpio" here is a number in the global GPIO numberspace.
-	 * get rid of this from the ranges eventually and get the GPIO
-	 * descriptor from the gpio_chip.
-	 */
-	struct gpio_chip *chip = gpiod_to_chip(gpio_to_desc(gpio));
-
-	if (WARN(!chip, "no gpio_chip for gpio%i?", gpio))
-		return false;
 
 	mutex_lock(&pinctrldev_list_mutex);
 
@@ -355,8 +348,8 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
 		mutex_lock(&pctldev->mutex);
 		list_for_each_entry(range, &pctldev->gpio_ranges, node) {
 			/* Check if any gpio range overlapped with gpio chip */
-			if (range->base + range->npins - 1 < chip->base ||
-			    range->base > chip->base + chip->ngpio - 1)
+			if (range->base + range->npins - 1 < gc->base ||
+			    range->base > gc->base + gc->ngpio - 1)
 				continue;
 			mutex_unlock(&pctldev->mutex);
 			mutex_unlock(&pinctrldev_list_mutex);
@@ -370,7 +363,11 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
 	return false;
 }
 #else
-static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; }
+static inline bool
+pinctrl_ready_for_gpio_range(struct gpio_chip *gc, unsigned int offset)
+{
+	return true;
+}
 #endif
 
 /**
@@ -805,7 +802,7 @@ int pinctrl_gpio_request(struct gpio_chip *gc, unsigned int offset)
 
 	ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range);
 	if (ret) {
-		if (pinctrl_ready_for_gpio_range(gc->base + offset))
+		if (pinctrl_ready_for_gpio_range(gc, offset))
 			ret = 0;
 		return ret;
 	}
-- 
2.39.2