diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 94da3cfca7f8..7ab6bc3ce498 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -2249,7 +2249,6 @@ static long fuse_dev_ioctl(struct file *file, unsigned int cmd,
 	int res;
 	int oldfd;
 	struct fuse_dev *fud = NULL;
-	struct fuse_passthrough_out pto;
 
 	if (_IOC_TYPE(cmd) != FUSE_DEV_IOC_MAGIC)
 		return -EINVAL;
@@ -2282,13 +2281,11 @@ static long fuse_dev_ioctl(struct file *file, unsigned int cmd,
 		break;
 	case _IOC_NR(FUSE_DEV_IOC_PASSTHROUGH_OPEN):
 		res = -EFAULT;
-		if (!copy_from_user(&pto,
-				    (struct fuse_passthrough_out __user *)arg,
-				    sizeof(pto))) {
+		if (!get_user(oldfd, (__u32 __user *)arg)) {
 			res = -EINVAL;
 			fud = fuse_get_dev(file);
 			if (fud)
-				res = fuse_passthrough_open(fud, &pto);
+				res = fuse_passthrough_open(fud, oldfd);
 		}
 		break;
 	default:
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index f664d50a2a5a..86b7dadcc5e7 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1249,8 +1249,7 @@ bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment);
 void fuse_dax_cancel_work(struct fuse_conn *fc);
 
 /* passthrough.c */
-int fuse_passthrough_open(struct fuse_dev *fud,
-			  struct fuse_passthrough_out *pto);
+int fuse_passthrough_open(struct fuse_dev *fud, u32 lower_fd);
 int fuse_passthrough_setup(struct fuse_conn *fc, struct fuse_file *ff,
 			   struct fuse_open_out *openarg);
 void fuse_passthrough_release(struct fuse_passthrough *passthrough);
diff --git a/fs/fuse/passthrough.c b/fs/fuse/passthrough.c
index 1df94c1d8a00..52068065fddc 100644
--- a/fs/fuse/passthrough.c
+++ b/fs/fuse/passthrough.c
@@ -179,8 +179,7 @@ ssize_t fuse_passthrough_mmap(struct file *file, struct vm_area_struct *vma)
 	return ret;
 }
 
-int fuse_passthrough_open(struct fuse_dev *fud,
-			  struct fuse_passthrough_out *pto)
+int fuse_passthrough_open(struct fuse_dev *fud, u32 lower_fd)
 {
 	int res;
 	struct file *passthrough_filp;
@@ -192,11 +191,7 @@ int fuse_passthrough_open(struct fuse_dev *fud,
 	if (!fc->passthrough)
 		return -EPERM;
 
-	/* This field is reserved for future implementation */
-	if (pto->len != 0)
-		return -EINVAL;
-
-	passthrough_filp = fget(pto->fd);
+	passthrough_filp = fget(lower_fd);
 	if (!passthrough_filp) {
 		pr_err("FUSE: invalid file descriptor for passthrough.\n");
 		return -EBADF;
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index c9f98e225db6..bf3c62dd7112 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -810,14 +810,6 @@ struct fuse_in_header {
 	uint32_t	padding;
 };
 
-/* fuse_passthrough_out for passthrough V1 */
-struct fuse_passthrough_out {
-	uint32_t	fd;
-	/* For future implementation */
-	uint32_t	len;
-	void		*vec;
-};
-
 struct fuse_out_header {
 	uint32_t	len;
 	int32_t		error;
@@ -895,8 +887,9 @@ struct fuse_notify_retrieve_in {
 /* Device ioctls: */
 #define FUSE_DEV_IOC_MAGIC		229
 #define FUSE_DEV_IOC_CLONE		_IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
-/* 127 is reserved for the V1 interface implementation in Android */
-#define FUSE_DEV_IOC_PASSTHROUGH_OPEN	_IOW(FUSE_DEV_IOC_MAGIC, 127, struct fuse_passthrough_out)
+/* 127 is reserved for the V1 interface implementation in Android (deprecated) */
+/* 126 is reserved for the V2 interface implementation in Android */
+#define FUSE_DEV_IOC_PASSTHROUGH_OPEN	_IOW(FUSE_DEV_IOC_MAGIC, 126, __u32)
 
 struct fuse_lseek_in {
 	uint64_t	fh;