diff --git a/drivers/usbhost/usbhost_hidmouse.c b/drivers/usbhost/usbhost_hidmouse.c
index 6e6b545710..043adb3183 100644
--- a/drivers/usbhost/usbhost_hidmouse.c
+++ b/drivers/usbhost/usbhost_hidmouse.c
@@ -1159,7 +1159,7 @@ static int usbhost_mouse_poll(int argc, char *argv[])
               if (buttons != priv->buttons || usbhost_threshold(priv))
 #endif
                 {
-                  /* We get here when either there is a meaning button
+                  /* We get here when either there is a meaningful button
                    * change and/or a significant movement of the mouse.  We
                    * are going to report the mouse event.
                    *
diff --git a/graphics/nxmu/nxmu_mouse.c b/graphics/nxmu/nxmu_mouse.c
index 18f6e03d9a..66a6cfb8d1 100644
--- a/graphics/nxmu/nxmu_mouse.c
+++ b/graphics/nxmu/nxmu_mouse.c
@@ -49,14 +49,6 @@
 
 #ifdef CONFIG_NX_XYINPUT
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -66,14 +58,6 @@ static struct nxgl_point_s   g_mrange;
 static uint8_t               g_mbutton;
 static struct nxbe_window_s *g_mwnd;
 
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
diff --git a/wireless/ieee802154/mac802154_netdev.c b/wireless/ieee802154/mac802154_netdev.c
index 84e58ed867..5ba554c5e2 100644
--- a/wireless/ieee802154/mac802154_netdev.c
+++ b/wireless/ieee802154/mac802154_netdev.c
@@ -443,12 +443,10 @@ static int macnet_notify(FAR struct mac802154_maccb_s *maccb,
 #endif
         }
 #endif
-
-      nxsem_post(&priv->md_exclsem);
-      return OK;
     }
 
   nxsem_post(&priv->md_exclsem);
+  return OK;
 }
 
 /****************************************************************************