[53/75] thermal: return an error on failure to register thermal class

[Ben Hutchings <ben@decadent.org.uk>]

3.2.44-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Richard Guy Briggs <rbriggs@redhat.com>

commit da28d966f6aa942ae836d09729f76a1647932309 upstream.

The return code from the registration of the thermal class is used to
unallocate resources, but this failure isn't passed back to the caller of
thermal_init.  Return this failure back to the caller.

This bug was introduced in changeset 4cb18728 which overwrote the return code
when the variable was re-used to catch the return code of the registration of
the genetlink thermal socket family.

Signed-off-by: Richard Guy Briggs <rbriggs@redhat.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 drivers/thermal/thermal_sys.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -1399,6 +1399,7 @@ static int __init thermal_init(void)
 		idr_destroy(&thermal_cdev_idr);
 		mutex_destroy(&thermal_idr_lock);
 		mutex_destroy(&thermal_list_lock);
+		return result;
 	}
 	result = genetlink_init();
 	return result;