diff --git a/backend/genesys.cc b/backend/genesys.cc
index 2a4e5526b..4c5984cbe 100644
--- a/backend/genesys.cc
+++ b/backend/genesys.cc
@@ -3651,14 +3651,8 @@ genesys_start_scan (Genesys_Device * dev, SANE_Bool lamp_off)
         sanei_genesys_wait_for_home(dev);
     }
 
-  /* disable power saving*/
-  status = dev->model->cmd_set->save_power (dev, SANE_FALSE);
-  if (status != SANE_STATUS_GOOD)
-    {
-      DBG(DBG_error, "%s: failed to disable power saving mode: %s\n", __func__,
-          sane_strstatus(status));
-      return status;
-    }
+    // disable power saving
+    dev->model->cmd_set->save_power(dev, SANE_FALSE);
 
   /* wait for lamp warmup : until a warmup for TRANSPARENCY is designed, skip
    * it when scanning from XPA. */
@@ -6217,7 +6211,6 @@ void
 sane_close_impl(SANE_Handle handle)
 {
     DBG_HELPER(dbg);
-  SANE_Status status = SANE_STATUS_GOOD;
 
   /* remove handle from list of open handles: */
   auto it = s_scanners->end();
@@ -6251,13 +6244,8 @@ sane_close_impl(SANE_Handle handle)
         }
     }
 
-  /* enable power saving before leaving */
-  status = s->dev->model->cmd_set->save_power (s->dev, SANE_TRUE);
-  if (status != SANE_STATUS_GOOD)
-    {
-      DBG(DBG_error, "%s: failed to enable power saving mode: %s\n", __func__,
-          sane_strstatus(status));
-    }
+    // enable power saving before leaving
+    s->dev->model->cmd_set->save_power(s->dev, SANE_TRUE);
 
     // here is the place to store calibration cache
     if (s->dev->force_calibration == 0) {
@@ -6864,20 +6852,19 @@ set_option_value (Genesys_Scanner * s, int option, void *val,
             s->dev->gamma_override_tables[GENESYS_BLUE][i] = table[i];
         }
       break;
-    case OPT_CALIBRATE:
-      status = s->dev->model->cmd_set->save_power (s->dev, SANE_FALSE);
-      if (status != SANE_STATUS_GOOD)
-	{
-	  DBG(DBG_error, "%s: failed to disable power saving mode: %s\n", __func__,
-	      sane_strstatus(status));
-	}
-      else
-        status = genesys_scanner_calibration(s->dev, sensor);
-      /* not critical if this fails*/
-      s->dev->model->cmd_set->save_power (s->dev, SANE_TRUE);
-      /* signals that sensors will have to be read again */
-      *myinfo |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS;
-      break;
+        case OPT_CALIBRATE: {
+            catch_all_exceptions(__func__, [&]()
+            {
+                s->dev->model->cmd_set->save_power(s->dev, SANE_FALSE);
+                TIE(genesys_scanner_calibration(s->dev, sensor));
+            });
+            catch_all_exceptions(__func__, [&]()
+            {
+                s->dev->model->cmd_set->save_power(s->dev, SANE_TRUE);
+            });
+            *myinfo |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS;
+            break;
+        }
     case OPT_CLEAR_CALIBRATION:
       s->dev->calibration_cache.clear();
 
@@ -7321,13 +7308,7 @@ void sane_cancel_impl(SANE_Handle handle)
   /* enable power saving mode unless we are parking .... */
   if(s->dev->parking==SANE_FALSE)
     {
-      status = s->dev->model->cmd_set->save_power (s->dev, SANE_TRUE);
-      if (status != SANE_STATUS_GOOD)
-        {
-          DBG(DBG_error, "%s: failed to enable power saving mode: %s\n", __func__,
-              sane_strstatus(status));
-          return;
-        }
+        s->dev->model->cmd_set->save_power(s->dev, SANE_TRUE);
     }
 
   return;
diff --git a/backend/genesys_gl124.cc b/backend/genesys_gl124.cc
index bef9b8de4..3a38021fd 100644
--- a/backend/genesys_gl124.cc
+++ b/backend/genesys_gl124.cc
@@ -1487,14 +1487,10 @@ gl124_calculate_current_setup (Genesys_Device * dev, const Genesys_Sensor& senso
  * @param dev device to use
  * @param enable true to set inot powersaving
  * */
-static SANE_Status
-gl124_save_power (Genesys_Device * dev, SANE_Bool enable)
+static void gl124_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
+    (void) dev;
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
-  if (dev == NULL)
-    return SANE_STATUS_INVAL;
-
-  return SANE_STATUS_GOOD;
 }
 
 static SANE_Status
diff --git a/backend/genesys_gl646.cc b/backend/genesys_gl646.cc
index 45d03bdbb..3eb6f16b2 100644
--- a/backend/genesys_gl646.cc
+++ b/backend/genesys_gl646.cc
@@ -1519,9 +1519,7 @@ static void gl646_public_set_fe(Genesys_Device* dev, const Genesys_Sensor& senso
  * @param enable SANE_TRUE to enable power saving, SANE_FALSE to leave it
  * @return allways SANE_STATUS_GOOD
  */
-static
-SANE_Status
-gl646_save_power (Genesys_Device * dev, SANE_Bool enable)
+static void gl646_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
 
@@ -1535,8 +1533,6 @@ gl646_save_power (Genesys_Device * dev, SANE_Bool enable)
     {
       gl646_set_fe(dev, sensor, AFE_INIT, 0);
     }
-
-  return SANE_STATUS_GOOD;
 }
 
 static SANE_Status
diff --git a/backend/genesys_gl646.h b/backend/genesys_gl646.h
index 686c61cdd..963ee2dce 100644
--- a/backend/genesys_gl646.h
+++ b/backend/genesys_gl646.h
@@ -169,9 +169,7 @@ static void gl646_set_fe(Genesys_Device* dev, const Genesys_Sensor& sensor, uint
 
 static void gl646_public_set_fe(Genesys_Device* dev, const Genesys_Sensor& sensor, uint8_t set);
 
-static
-SANE_Status
-gl646_save_power (Genesys_Device * dev, SANE_Bool enable);
+static void gl646_save_power(Genesys_Device* dev, SANE_Bool enable);
 
 static void gl646_slow_back_home(Genesys_Device* dev, SANE_Bool wait_until_home);
 
diff --git a/backend/genesys_gl841.cc b/backend/genesys_gl841.cc
index 0741d6aae..d728487b3 100644
--- a/backend/genesys_gl841.cc
+++ b/backend/genesys_gl841.cc
@@ -2305,8 +2305,8 @@ dummy \ scanned lines
   dev->current_setup.max_shift = max_shift + stagger;
 }
 
-/*for fast power saving methods only, like disabling certain amplifiers*/
-static SANE_Status gl841_save_power(Genesys_Device * dev, SANE_Bool enable)
+// for fast power saving methods only, like disabling certain amplifiers
+static void gl841_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
     uint8_t val;
@@ -2401,8 +2401,6 @@ static SANE_Status gl841_save_power(Genesys_Device * dev, SANE_Bool enable)
 	  }
 
     }
-
-    return SANE_STATUS_GOOD;
 }
 
 static SANE_Status
diff --git a/backend/genesys_gl843.cc b/backend/genesys_gl843.cc
index f2c0a653c..c9b388b98 100644
--- a/backend/genesys_gl843.cc
+++ b/backend/genesys_gl843.cc
@@ -1671,16 +1671,11 @@ gl843_calculate_current_setup(Genesys_Device * dev, const Genesys_Sensor& sensor
  * @param dev device to use
  * @param enable true to set inot powersaving
  * */
-static SANE_Status
-gl843_save_power (Genesys_Device * dev, SANE_Bool enable)
+static void gl843_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
   uint8_t val;
 
-    if (dev == NULL) {
-        return SANE_STATUS_INVAL;
-    }
-
     // switch KV-SS080 lamp off
     if (dev->model->gpo_type == GPO_KVSS080) {
         sanei_genesys_read_register(dev, REG6C, &val);
@@ -1691,8 +1686,6 @@ gl843_save_power (Genesys_Device * dev, SANE_Bool enable)
         }
         sanei_genesys_write_register(dev,REG6C,val);
     }
-
-  return SANE_STATUS_GOOD;
 }
 
 static SANE_Status
diff --git a/backend/genesys_gl846.cc b/backend/genesys_gl846.cc
index 19c52f6dc..82dbffbe8 100644
--- a/backend/genesys_gl846.cc
+++ b/backend/genesys_gl846.cc
@@ -1339,15 +1339,11 @@ gl846_calculate_current_setup(Genesys_Device * dev, const Genesys_Sensor& sensor
   dev->current_setup.max_shift = max_shift + stagger;
 }
 
-/*for fast power saving methods only, like disabling certain amplifiers*/
-static SANE_Status
-gl846_save_power (Genesys_Device * dev, SANE_Bool enable)
+// for fast power saving methods only, like disabling certain amplifiers
+static void gl846_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
+    (void) dev;
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
-  if (dev == NULL)
-    return SANE_STATUS_INVAL;
-
-  return SANE_STATUS_GOOD;
 }
 
 static SANE_Status
diff --git a/backend/genesys_gl847.cc b/backend/genesys_gl847.cc
index d0c8358e7..805febfdf 100644
--- a/backend/genesys_gl847.cc
+++ b/backend/genesys_gl847.cc
@@ -1355,15 +1355,11 @@ gl847_calculate_current_setup(Genesys_Device * dev, const Genesys_Sensor& sensor
   dev->current_setup.max_shift = max_shift + stagger;
 }
 
-/*for fast power saving methods only, like disabling certain amplifiers*/
-static SANE_Status
-gl847_save_power (Genesys_Device * dev, SANE_Bool enable)
+// for fast power saving methods only, like disabling certain amplifiers
+static void gl847_save_power(Genesys_Device* dev, SANE_Bool enable)
 {
     DBG_HELPER_ARGS(dbg, "enable = %d", enable);
-  if (dev == NULL)
-    return SANE_STATUS_INVAL;
-
-  return SANE_STATUS_GOOD;
+    (void) dev;
 }
 
 static SANE_Status
diff --git a/backend/genesys_low.h b/backend/genesys_low.h
index e24153aa8..96cfd4bf3 100644
--- a/backend/genesys_low.h
+++ b/backend/genesys_low.h
@@ -1067,7 +1067,7 @@ struct Genesys_Command_Set
 
     void (*set_fe) (Genesys_Device* dev, const Genesys_Sensor& sensor, uint8_t set);
     SANE_Status (*set_powersaving) (Genesys_Device * dev, int delay);
-    SANE_Status (*save_power) (Genesys_Device * dev, SANE_Bool enable);
+    void (*save_power) (Genesys_Device* dev, SANE_Bool enable);
 
     void (*begin_scan) (Genesys_Device* dev, const Genesys_Sensor& sensor,
                         Genesys_Register_Set* regs, SANE_Bool start_motor);