diff --git a/drivers/block/efi-block-io.c b/drivers/block/efi-block-io.c
index 39dbfb0..30db486 100644
--- a/drivers/block/efi-block-io.c
+++ b/drivers/block/efi-block-io.c
@@ -131,16 +131,9 @@
 			media->optimal_transfer_length_granularity);
 }
 
-static int is_bio_usbdev(struct efi_device *efidev)
+static bool is_bio_usbdev(struct efi_device *efidev)
 {
-	int i;
-
-	for (i = 0; i < efidev->num_guids; i++) {
-		if (!efi_guidcmp(efidev->guids[i], EFI_USB_IO_PROTOCOL_GUID))
-			return 1;
-	}
-
-	return 0;
+	return efi_device_has_guid(efidev, EFI_USB_IO_PROTOCOL_GUID);
 }
 
 static int efi_bio_probe(struct efi_device *efidev)
diff --git a/drivers/efi/efi-device.c b/drivers/efi/efi-device.c
index a1aac2d..ac035dc 100644
--- a/drivers/efi/efi-device.c
+++ b/drivers/efi/efi-device.c
@@ -386,16 +386,9 @@
 	return ret != 1;
 }
 
-static int is_bio_usbdev(struct efi_device *efidev)
+static bool is_bio_usbdev(struct efi_device *efidev)
 {
-	int i;
-
-	for (i = 0; i < efidev->num_guids; i++) {
-		if (!efi_guidcmp(efidev->guids[i], EFI_USB_IO_PROTOCOL_GUID))
-			return 1;
-	}
-
-	return 0;
+	return efi_device_has_guid(efidev, EFI_USB_IO_PROTOCOL_GUID);
 }
 
 static struct efi_device *bootdev;
diff --git a/include/efi/efi-device.h b/include/efi/efi-device.h
index 5eaf1f2..5ec59a8 100644
--- a/include/efi/efi-device.h
+++ b/include/efi/efi-device.h
@@ -45,4 +45,16 @@
 void efi_register_devices(void);
 struct efi_device *efi_get_bootsource(void);
 
+static inline bool efi_device_has_guid(struct efi_device *efidev, efi_guid_t guid)
+{
+	int i;
+
+	for (i = 0; i < efidev->num_guids; i++) {
+		if (!efi_guidcmp(efidev->guids[i], guid))
+			return true;
+	}
+
+	return false;
+}
+
 #endif /* __EFI_EFI_DEVICE_H */