lirc: rc_dev_get_from_fd(): fix file leak

missing fdput() on a failure exit

Fixes: 6a9d552 "media: rc: bpf attach/detach requires write permission" # v6.9
Signed-off-by: Al Viro <[email protected]>

Author: Al Viro

drivers/media/rc/lirc_dev.c

@@ -828,8 +828,10 @@ struct rc_dev *rc_dev_get_from_fd(int fd, bool write)
 		return ERR_PTR(-EINVAL);
 	}
 
-	if (write && !(f.file->f_mode & FMODE_WRITE))
+	if (write && !(f.file->f_mode & FMODE_WRITE)) {
+		fdput(f);
 		return ERR_PTR(-EPERM);
+	}
 
 	fh = f.file->private_data;
 	dev = fh->rc;