leds: Fix led trigger locking bugs
Convert part of the led trigger core from rw spinlocks to rw
semaphores. We're calling functions which can sleep from invalid
contexts otherwise. Fixes bug #9264.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
diff --git a/include/linux/leds.h b/include/linux/leds.h
index dc1178f..b4130ff 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -14,6 +14,7 @@
#include <linux/list.h>
#include <linux/spinlock.h>
+#include <linux/rwsem.h>
struct device;
/*
@@ -43,7 +44,7 @@
#ifdef CONFIG_LEDS_TRIGGERS
/* Protects the trigger data below */
- rwlock_t trigger_lock;
+ struct rw_semaphore trigger_lock;
struct led_trigger *trigger;
struct list_head trig_list;