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>

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d755440..1067fb0 100644 (file)
--- 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;