From: Zhang Rui <rui.zhang@intel.com>
Date: Thu, 2 Jan 2014 03:57:48 +0000 (+0800)
Subject: Thermal cpu cooling: return error if no valid cpu frequency entry
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a116776f7b6052599df0c67db29c30ea9d69d7ee;p=linux.git

Thermal cpu cooling: return error if no valid cpu frequency entry

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index cc556a8e28427..bb486b4ca48ec 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -173,6 +173,11 @@ static int get_property(unsigned int cpu, unsigned long input,
 		freq = table[i].frequency;
 		max_level++;
 	}
+
+	/* No valid cpu frequency entry */
+	if (max_level == 0)
+		return -EINVAL;
+
 	/* max_level is an index, not a counter */
 	max_level--;