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>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/leds.h b/include/linux/leds.h
index dc1178f6184b..b4130ff58d0c 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 @@ struct led_classdev {
 
 #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;