[RFC 04/16] io_uring: move flags check to io_uring_sanitise_params

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

io_uring_sanitise_params() sanitises most of the setup flags invariants,
move the IORING_SETUP_FLAGS check from io_uring_setup() into it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/io_uring.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index dec37cf7c62c..ef1b75c5a4d2 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3435,6 +3435,9 @@ static int io_uring_sanitise_params(struct io_uring_params *p)
 {
 	unsigned flags = p->flags;
 
+	if (flags & ~IORING_SETUP_FLAGS)
+		return -EINVAL;
+
 	/* There is no way to mmap rings without a real fd */
 	if ((flags & IORING_SETUP_REGISTERED_FD_ONLY) &&
 	    !(flags & IORING_SETUP_NO_MMAP))
@@ -3696,8 +3699,6 @@ static long io_uring_setup(u32 entries, struct io_uring_params __user *params)
 	if (!mem_is_zero(&p.resv, sizeof(p.resv)))
 		return -EINVAL;
 
-	if (p.flags & ~IORING_SETUP_FLAGS)
-		return -EINVAL;
 	p.sq_entries = entries;
 	return io_uring_create(&p, params);
 }
-- 
2.49.0