[PATCH] platform: x86: Add check for led_classdev_register

[Aditya Pakki]

In function alienware_zone_init, the function led_classdev_register
can return an error on failure. The fix checks the error and frees
the allocated resources.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 drivers/platform/x86/alienware-wmi.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/alienware-wmi.c 
b/drivers/platform/x86/alienware-wmi.c
index f10af5c383c5..63ab6a2eb613 100644
--- a/drivers/platform/x86/alienware-wmi.c
+++ b/drivers/platform/x86/alienware-wmi.c
@@ -441,6 +441,7 @@ static int alienware_zone_init(struct platform_device *dev)
        u8 zone;
        char buffer[10];
        char *name;
+       int ret;
 
        if (interface == WMAX) {
                lighting_control_state = WMAX_RUNNING;
@@ -492,7 +493,17 @@ static int alienware_zone_init(struct platform_device *dev)
        zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
        zone_attribute_group.attrs = zone_attrs;
 
-       led_classdev_register(&dev->dev, &global_led);
+       ret = led_classdev_register(&dev->dev, &global_led);
+       if (ret < 0) {
+               if (zone_dev_attrs) {
+                       for (zone = 0; zone < quirks->num_zones; zone++)
+                               kfree(zone_dev_attrs[zone].attr.name);
+               }
+               kfree(zone_dev_attrs);
+               kfree(zone_data);
+               kfree(zone_attrs);
+               return ret;
+       }
 
        return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
 }
-- 
2.17.1