diff mbox series

[04/17] Input: ep93xx_keypad - use guard notation when acquiring mutex

Message ID 20240825051627.2848495-5-dmitry.torokhov@gmail.com
State Handled Elsewhere
Headers show
Series Convert keyboard drivers to use new cleanup facilities | expand

Commit Message

Dmitry Torokhov Aug. 25, 2024, 5:16 a.m. UTC 
This makes the code more compact and error handling more robust
by ensuring that mutexes are released in all code paths when control
leaves critical section.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/ep93xx_keypad.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
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Patch

diff --git a/drivers/input/keyboard/ep93xx_keypad.c b/drivers/input/keyboard/ep93xx_keypad.c
index 6b811d6bf625..a8df957ef261 100644
--- a/drivers/input/keyboard/ep93xx_keypad.c
+++ b/drivers/input/keyboard/ep93xx_keypad.c
@@ -184,15 +184,13 @@  static int ep93xx_keypad_suspend(struct device *dev)
 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
 	struct input_dev *input_dev = keypad->input_dev;
 
-	mutex_lock(&input_dev->mutex);
+	guard(mutex)(&input_dev->mutex);
 
 	if (keypad->enabled) {
 		clk_disable(keypad->clk);
 		keypad->enabled = false;
 	}
 
-	mutex_unlock(&input_dev->mutex);
-
 	return 0;
 }
 
@@ -202,7 +200,7 @@  static int ep93xx_keypad_resume(struct device *dev)
 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
 	struct input_dev *input_dev = keypad->input_dev;
 
-	mutex_lock(&input_dev->mutex);
+	guard(mutex)(&input_dev->mutex);
 
 	if (input_device_enabled(input_dev)) {
 		if (!keypad->enabled) {
@@ -212,8 +210,6 @@  static int ep93xx_keypad_resume(struct device *dev)
 		}
 	}
 
-	mutex_unlock(&input_dev->mutex);
-
 	return 0;
 }