2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 5c8377b9ad9b..d134301b553c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -815,7 +815,9 @@ static ssize_t iwl_dbgfs_sleep_level_override_write(struct file *file,
 
         priv->power_data.debug_sleep_level_override = value;
 
+        mutex_lock(&priv->mutex);
         iwl_power_update_mode(priv, true);
+        mutex_unlock(&priv->mutex);
 
         return count;
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c
index 232dd1879baf..1a1a9f081cc7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-power.c
+++ b/drivers/net/wireless/iwlwifi/iwl-power.c
@@ -303,7 +303,7 @@ static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
                                 sizeof(struct iwl_powertable_cmd), cmd);
 }
 
-
+/* priv->mutex must be held */
 int iwl_power_update_mode(struct iwl_priv *priv, bool force)
 {
         int ret = 0;