net: 8390: fix potential NULL pointer dereferences

[linux-2.6-microblaze.git] / drivers / leds / led-core.c

diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index ede4fa0..e3da7c0 100644 (file)
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -16,7 +16,9 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/of.h>
 #include <linux/rwsem.h>
+#include <linux/slab.h>
 #include "leds.h"
 
 DECLARE_RWSEM(leds_list_lock);
@@ -310,6 +312,34 @@ int led_update_brightness(struct led_classdev *led_cdev)
 }
 EXPORT_SYMBOL_GPL(led_update_brightness);
 
+u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size)
+{
+       struct device_node *np = dev_of_node(led_cdev->dev);
+       u32 *pattern;
+       int count;
+
+       if (!np)
+               return NULL;
+
+       count = of_property_count_u32_elems(np, "led-pattern");
+       if (count < 0)
+               return NULL;
+
+       pattern = kcalloc(count, sizeof(*pattern), GFP_KERNEL);
+       if (!pattern)
+               return NULL;
+
+       if (of_property_read_u32_array(np, "led-pattern", pattern, count)) {
+               kfree(pattern);
+               return NULL;
+       }
+
+       *size = count;
+
+       return pattern;
+}
+EXPORT_SYMBOL_GPL(led_get_default_pattern);
+
 /* Caller must ensure led_cdev->led_access held */
 void led_sysfs_disable(struct led_classdev *led_cdev)
 {