[PATCH for-next 4/5] io_uring: don't check file ops of registered rings

[Pavel Begunkov <asml.silence@gmail.com>]

Registered rings are per definitions io_uring files, so we don't need to
additionally verify them.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/io_uring.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index f40526426db8..e1e8dcd17df3 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3036,22 +3036,22 @@ SYSCALL_DEFINE6(io_uring_enter, unsigned int, fd, u32, to_submit,
 	if (flags & IORING_ENTER_REGISTERED_RING) {
 		struct io_uring_task *tctx = current->io_uring;
 
-		if (!tctx || fd >= IO_RINGFD_REG_MAX)
+		if (unlikely(!tctx || fd >= IO_RINGFD_REG_MAX))
 			return -EINVAL;
 		fd = array_index_nospec(fd, IO_RINGFD_REG_MAX);
 		f.file = tctx->registered_rings[fd];
 		f.flags = 0;
+		if (unlikely(!f.file))
+			return -EBADF;
 	} else {
 		f = fdget(fd);
+		if (unlikely(!f.file))
+			return -EBADF;
+		ret = -EOPNOTSUPP;
+		if (unlikely(!io_is_uring_fops(f.file)))
+			goto out_fput;
 	}
 
-	if (unlikely(!f.file))
-		return -EBADF;
-
-	ret = -EOPNOTSUPP;
-	if (unlikely(!io_is_uring_fops(f.file)))
-		goto out_fput;
-
 	ret = -ENXIO;
 	ctx = f.file->private_data;
 	if (unlikely(!percpu_ref_tryget(&ctx->refs)))
-- 
2.36.1