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| author | Leon Romanovsky <leonro@nvidia.com> | 2026-03-25 20:16:03 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-03-30 13:47:45 -0400 |
| commit | 911e5ca3e16975866739f49b6e24c858110110bc (patch) | |
| tree | 020bc499652646521ed6c9375234dbf98f6a652a /tools/lib/python/kdoc | |
| parent | 179b32095854d44749dd535502f05d95bbf43775 (diff) | |
RDMA/mlx4: Restrict external umem for CQ when copy_to_user() is used
When the mlx4 firmware reports the MLX4_DEV_CAP_FLAG2_SW_CQ_INIT capability,
libmlx4 from the rdma-core package expects the driver to initialize memory
at the address provided in the buf_addr parameter of ucmd.
This behavior cannot be supported by any external umem implementation, so
restrict it accordingly.
Fixes: f45f195af521 ("RDMA/mlx4: Introduce a modern CQ creation interface")
Reported-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260325-fix-mlx4-external-umem-v1-1-1c7c0e779329@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Diffstat (limited to 'tools/lib/python/kdoc')
0 files changed, 0 insertions, 0 deletions