[PATCH rdma-next 02/15] RDMA/mlx5: Allow optional access flags in DEVX UMEM registration
From: Michael Gur <hidden>
Date: 2026-07-26 09:30:21
Also in:
linux-rdma, lkml, stable
Subsystem:
infiniband subsystem, mellanox mlx5 ib driver, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
The uverbs ABI reserves the optional access flags range as best-effort:
drivers should accept any flag in this range and treat the actual support
as opportunistic, never failing registration when an optional flag is
requested.
Add the optional access flag to the allow-list of DEVX UMEM registration.
Uverbs users can now request any optional access flag on these
registrations and mlx5 will apply the flag's effect on a best-effort
basis when supported.
Fixes: 72b2f7608a59 ("RDMA/mlx5: Enable ATS support for MRs and umems")
Cc: stable@vger.kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Michael Gur <redacted>
---
drivers/infiniband/hw/mlx5/devx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index fc6f793dcc65..ec281a4ba42e 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c@@ -2410,7 +2410,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)( IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ | - IB_ACCESS_RELAXED_ORDERING); + IB_ACCESS_OPTIONAL); if (err) return err;
--
2.52.0