linux-kernel - [PATCH v2 6/8] gpiolib: Call validate_desc() when VALIDATE

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Message-ID: <20250416095645.2027695-7-andriy.shevchenko@linux.intel.com>
Date: Wed, 16 Apr 2025 12:55:14 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 6/8] gpiolib: Call validate_desc() when VALIDATE_DESC() can't be used

Call validate_desc() directly when VALIDATE_DESC() can't be used.
It will print additional information useful for debugging.

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpiolib.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index ad2e68f66500..3f3371e427fd 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -421,11 +421,8 @@ int gpiod_get_direction(struct gpio_desc *desc)
 	unsigned int offset;
 	int ret;
 
-	/*
-	 * We cannot use VALIDATE_DESC() as we must not return 0 for a NULL
-	 * descriptor like we usually do.
-	 */
-	if (IS_ERR_OR_NULL(desc))
+	ret = validate_desc(desc, __func__);
+	if (ret <= 0)
 		return -EINVAL;
 
 	CLASS(gpio_chip_guard, guard)(desc);
@@ -3982,13 +3979,10 @@ int gpiod_to_irq(const struct gpio_desc *desc)
 	struct gpio_device *gdev;
 	struct gpio_chip *gc;
 	int offset;
+	int ret;
 
-	/*
-	 * Cannot VALIDATE_DESC() here as gpiod_to_irq() consumer semantics
-	 * requires this function to not return zero on an invalid descriptor
-	 * but rather a negative error number.
-	 */
-	if (IS_ERR_OR_NULL(desc))
+	ret = validate_desc(desc, __func__);
+	if (ret <= 0)
 		return -EINVAL;
 
 	gdev = desc->gdev;
-- 
2.47.2