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 cc556a8e28427a336b90b3809406476da9f3e280..bb486b4ca48ec5cb3c914e8efcee16f37e24a75a 100644 (file)
--- 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--;