[PATCH 4/4] io_uring: kill extra user_bufs check

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

Testing ctx->user_bufs for NULL in io_import_fixed() is not neccessary,
because in that case ctx->nr_user_bufs would be zero, and the following
check would fail.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index fc2aaaaca908..2e3adf9d17dd 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2587,18 +2587,12 @@ static ssize_t io_import_fixed(struct io_kiocb *req, int rw,
 	struct io_ring_ctx *ctx = req->ctx;
 	size_t len = req->rw.len;
 	struct io_mapped_ubuf *imu;
-	u16 index, buf_index;
+	u16 index, buf_index = req->buf_index;
 	size_t offset;
 	u64 buf_addr;
 
-	/* attempt to use fixed buffers without having provided iovecs */
-	if (unlikely(!ctx->user_bufs))
-		return -EFAULT;
-
-	buf_index = req->buf_index;
 	if (unlikely(buf_index >= ctx->nr_user_bufs))
 		return -EFAULT;
-
 	index = array_index_nospec(buf_index, ctx->nr_user_bufs);
 	imu = &ctx->user_bufs[index];
 	buf_addr = req->rw.addr;
-- 
2.24.0