[PATCH 8/8] io_uring/zcrx: add support for IORING_SETUP_CQE_MIXED

[Jens Axboe <axboe@kernel.dk>]

zcrx currently requires the ring to be set up with fixed 32b CQEs,
allow it to use IORING_SETUP_CQE_MIXED as well.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 Documentation/networking/iou-zcrx.rst | 2 +-
 io_uring/zcrx.c                       | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/networking/iou-zcrx.rst b/Documentation/networking/iou-zcrx.rst
index 0127319b30bb..54a72e172bdc 100644
--- a/Documentation/networking/iou-zcrx.rst
+++ b/Documentation/networking/iou-zcrx.rst
@@ -75,7 +75,7 @@ Create an io_uring instance with the following required setup flags::
 
   IORING_SETUP_SINGLE_ISSUER
   IORING_SETUP_DEFER_TASKRUN
-  IORING_SETUP_CQE32
+  IORING_SETUP_CQE32 or IORING_SETUP_CQE_MIXED
 
 Create memory area
 ------------------
diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index e5ff49f3425e..f1da852c496b 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -554,8 +554,9 @@ int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
 		return -EPERM;
 
 	/* mandatory io_uring features for zc rx */
-	if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN &&
-	      ctx->flags & IORING_SETUP_CQE32))
+	if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN))
+		return -EINVAL;
+	if (!(ctx->flags & (IORING_SETUP_CQE32|IORING_SETUP_CQE_MIXED)))
 		return -EINVAL;
 	if (copy_from_user(&reg, arg, sizeof(reg)))
 		return -EFAULT;
-- 
2.50.1