Fix stm32l4_otgfshost.c: error: 'ret' undeclared

arch/arm/src/lc823450/lc823450_usbdev.c

@@ -1925,7 +1925,7 @@ int usbdev_msc_epread(void *buf, int len)
            CONFIG_USBMSC_EPBULKOUT  << USB_DMAC_DMAEP_SHIFT |
            USB_DMAC_START,
            USB_DMAC1);
-           nxsem_wait(&dma_wait);
+  nxsem_wait(&dma_wait);
 
   return 0;
 }

arch/arm/src/sama5/sam_tsd.c

@@ -378,10 +378,6 @@ static int sam_tsd_waitsample(struct sam_tsd_s *priv, struct sam_sample_s *sampl
 
       if (ret < 0)
         {
-          /* If we are awakened by a signal, then we need to return
-           * the failure now.
-           */
-
           ierr("ERROR: nxsem_wait: %d\n", ret);
           goto errout;
         }

arch/arm/src/stm32/stm32_adc.c

@@ -1854,15 +1854,15 @@ static void adc_inj_startconv(FAR struct stm32_dev_s *priv, bool enable)
 #ifdef HAVE_ADC_CMN_DATA
 static int adccmn_lock(FAR struct stm32_dev_s *priv, bool lock)
 {
-  int ret = OK;
+  int ret;
 
   if (lock)
     {
       ret = nxsem_wait_uninterruptible(&priv->cmn->lock);
     }
   else
     {
-      nxsem_post(&priv->cmn->lock);
+      ret = nxsem_post(&priv->cmn->lock);
     }
 
   return ret;

arch/arm/src/stm32l4/stm32l4_otgfshost.c

@@ -1079,6 +1079,7 @@ static int stm32l4_chan_wait(FAR struct stm32l4_usbhost_s *priv,
                              FAR struct stm32l4_chan_s *chan)
 {
   irqstate_t flags;
+  int ret;
 
   /* Disable interrupts so that the following operations will be atomic.  On
    * the OTG FS global interrupt needs to be disabled.  However, here we disable

drivers/input/ads7843e.c

@@ -418,10 +418,6 @@ static int ads7843e_waitsample(FAR struct ads7843e_dev_s *priv,
 
       if (ret < 0)
         {
-          /* If we are awakened by a signal, then we need to return
-           * the failure now.
-           */
-
           ierr("ERROR: nxsem_wait: %d\n", ret);
           goto errout;
         }

drivers/usbhost/usbhost_hidmouse.c

@@ -1354,10 +1354,6 @@ static int usbhost_waitsample(FAR struct usbhost_state_s *priv,
 
       if (ret < 0)
         {
-          /* If we are awakened by a signal, then we need to return
-           * the failure now.
-           */
-
           ierr("ERROR: nxsem_wait: %d\n", ret);
           goto errout;
         }