Input: omap4-keypad - use guard notation when acquiring mutex

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.

Link: https://lore.kernel.org/r/20240825051627.2848495-13-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index 040b340995d89d4bae21630f6218f0bd17337684..935c2b27b81c29891bfd17f5ebad826d3d8b393d 100644 (file)
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -144,7 +144,7 @@ static void omap4_keypad_scan_keys(struct omap4_keypad *keypad_data, u64 keys)
 {
        u64 changed;
 
-       mutex_lock(&keypad_data->lock);
+       guard(mutex)(&keypad_data->lock);
 
        changed = keys ^ keypad_data->keys;
 
@@ -158,8 +158,6 @@ static void omap4_keypad_scan_keys(struct omap4_keypad *keypad_data, u64 keys)
        omap4_keypad_report_keys(keypad_data, changed & keys, true);
 
        keypad_data->keys = keys;
-
-       mutex_unlock(&keypad_data->lock);
 }
 
 /* Interrupt handlers */