thermal: cut the spaces when user sets policy

Setting policy results in invalid value error.
	% echo "step_wise" > policy
	% echo: write error: Invalid argument

Need clean up of the buffer which "echo" may add based on the arguments, before
comparing aganist list of governor names.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Tested-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d755440791b7..1067fb0107b9 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -33,6 +33,7 @@
 #include <linux/idr.h>
 #include <linux/thermal.h>
 #include <linux/reboot.h>
+#include <linux/string.h>
 #include <net/netlink.h>
 #include <net/genetlink.h>
 
@@ -713,10 +714,13 @@ policy_store(struct device *dev, struct device_attribute *attr,
         int ret = -EINVAL;
         struct thermal_zone_device *tz = to_thermal_zone(dev);
         struct thermal_governor *gov;
+        char name[THERMAL_NAME_LENGTH];
+
+        snprintf(name, sizeof(name), "%s", buf);
 
         mutex_lock(&thermal_governor_lock);
 
-        gov = __find_governor(buf);
+        gov = __find_governor(strim(name));
         if (!gov)
                 goto exit;