platform/chrome: cros_ec: Fix possible leak in led_rgb_store()

Function led_rgb_store() contains some direct returns in error cases that
leak the already allocated cros_ec_command message structure. Make sure
that 'msg' is freed in all exit paths. Detected by Coverity CID 1309666.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index fc30a991b738..ff7640575c75 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -252,7 +252,7 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
 
                 ret = sscanf(buf, "%i", &val[i++]);
                 if (ret == 0)
-                        return -EINVAL;
+                        goto exit;
 
                 if (i == 4) {
                         param = (struct ec_params_lightbar *)msg->data;
@@ -268,17 +268,15 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
                         if ((j++ % 4) == 0) {
                                 ret = lb_throttle();
                                 if (ret)
-                                        return ret;
+                                        goto exit;
                         }
 
                         ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
                         if (ret < 0)
                                 goto exit;
 
-                        if (msg->result != EC_RES_SUCCESS) {
-                                ret = -EINVAL;
+                        if (msg->result != EC_RES_SUCCESS)
                                 goto exit;
-                        }
 
                         i = 0;
                         ok = 1;