linux-kernel - [PATCH v1 1/1] gpiolib: Return label, if set, for IRQ only line

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Date: Wed,  8 May 2024 17:47:41 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Bartosz Golaszewski <brgl@...ev.pl>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] gpiolib: Return label, if set, for IRQ only line

If line has been locked as IRQ without requesting,
still check its label and return it, if not NULL.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpiolib.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index db536ec9734d..1f1673552767 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -105,16 +105,16 @@ const char *gpiod_get_label(struct gpio_desc *desc)
 	unsigned long flags;
 
 	flags = READ_ONCE(desc->flags);
-	if (test_bit(FLAG_USED_AS_IRQ, &flags) &&
-	    !test_bit(FLAG_REQUESTED, &flags))
-		return "interrupt";
-
-	if (!test_bit(FLAG_REQUESTED, &flags))
-		return NULL;
 
 	label = srcu_dereference_check(desc->label, &desc->srcu,
 				       srcu_read_lock_held(&desc->srcu));
 
+	if (test_bit(FLAG_USED_AS_IRQ, &flags))
+		return label->str ?: "interrupt";
+
+	if (!test_bit(FLAG_REQUESTED, &flags))
+		return NULL;
+
 	return label->str;
 }
 
-- 
2.43.0.rc1.1336.g36b5255a03ac