drivers: Use bool function return values true/false not 1/0

index e0f618b..d9b00b8 100644
@@ -1336,14 +1336,14 @@ static bool dm_table_supports_flush(struct dm_table *t, unsigned flush)
 			continue;
 
 		if (ti->flush_supported)
-			return 1;
+			return true;
 
 		if (ti->type->iterate_devices &&
 		    ti->type->iterate_devices(ti, device_flush_capable, &flush))
-			return 1;
+			return true;
 	}
 
-	return 0;
+	return false;
 }
 
 static bool dm_table_discard_zeroes_data(struct dm_table *t)

@@ -1356,10 +1356,10 @@ static bool dm_table_discard_zeroes_data(struct dm_table *t)
 		ti = dm_table_get_target(t, i++);
 
 		if (ti->discard_zeroes_data_unsupported)
-			return 0;
+			return false;
 	}
 
-	return 1;
+	return true;
 }
 
 static int device_is_nonrot(struct dm_target *ti, struct dm_dev *dev,

@@ -1405,10 +1405,10 @@ static bool dm_table_all_devices_attribute(struct dm_table *t,
 
 		if (!ti->type->iterate_devices ||
 		    !ti->type->iterate_devices(ti, func, NULL))
-			return 0;
+			return false;
 	}
 
-	return 1;
+	return true;
 }
 
 static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *dev,

@@ -1465,14 +1465,14 @@ static bool dm_table_supports_discards(struct dm_table *t)
 			continue;
 
 		if (ti->discards_supported)
-			return 1;
+			return true;
 
 		if (ti->type->iterate_devices &&
 		    ti->type->iterate_devices(ti, device_discard_capable, NULL))
-			return 1;
+			return true;
 	}
 
-	return 0;
+	return false;
 }
 
 void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,

index 26a0bd8..aac4757 100644
@@ -239,10 +239,10 @@ static bool find_guid(const char *guid_string, struct wmi_block **out)
 		if (memcmp(block->guid, guid_input, 16) == 0) {
 			if (out)
 				*out = wblock;
-			return 1;
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
 static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)

index 9e20e4d..749d41a 100644
@@ -115,7 +115,7 @@ static inline int of_thermal_get_ntrips(struct thermal_zone_device *tz)
 static inline bool of_thermal_is_trip_valid(struct thermal_zone_device *tz,
 					    int trip)
 {
-	return 0;
+	return false;
 }
 static inline const struct thermal_trip *
 of_thermal_get_trip_points(struct thermal_zone_device *tz)

index 129dc5b..117df15 100644
@@ -173,18 +173,18 @@ static int kgdb_nmi_poll_one_knock(void)
 bool kgdb_nmi_poll_knock(void)
 {
 	if (kgdb_nmi_knock < 0)
-		return 1;
+		return true;
 
 	while (1) {
 		int ret;
 
 		ret = kgdb_nmi_poll_one_knock();
 		if (ret == NO_POLL_CHAR)
-			return 0;
+			return false;
 		else if (ret == 1)
 			break;
 	}
-	return 1;
+	return true;
 }
 
 /*

index 810c51d..6ce2a6f 100644
@@ -64,7 +64,7 @@ bool ast_is_vga_enabled(struct drm_device *dev)
 			return ch & 0x04;
 		}
 	}
-	return 0;
+	return false;
 }
 
 static const u8 extreginfo[] = { 0x0f, 0x04, 0x1c, 0xff };

index 945f1e0..704e231 100644
@@ -502,7 +502,7 @@ bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence)
 	struct vmw_fence_manager *fman = fman_from_fence(fence);
 
 	if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags))
-		return 1;
+		return true;
 
 	vmw_fences_update(fman);
 

index e973405..ebee6b0 100644
@@ -242,7 +242,7 @@ static int ssb_gige_probe(struct ssb_device *sdev,
 bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
 {
 	if (!pdev->resource[0].name)
-		return 0;
+		return false;
 	return (strcmp(pdev->resource[0].name, SSB_GIGE_MEM_RES_NAME) == 0);
 }
 EXPORT_SYMBOL(pdev_is_ssb_gige_core);

index e735344..2e57df1 100644
@@ -495,7 +495,7 @@ int  genwqe_user_vunmap(struct genwqe_dev *cd, struct dma_mapping *m,
 static inline bool dma_mapping_used(struct dma_mapping *m)
 {
 	if (!m)
-		return 0;
+		return false;
 	return m->size != 0;
 }