RDMA/mlx4: Fix uABI structure layouts for 32/64 compat

rss_caps in struct mlx4_uverbs_ex_query_device_resp is misaligned on
32 bit compared to 64 bit, add explicit padding.

The rss caps were introduced recently and are very rarely used in user
space, mainly for DPDK.

We don't expect there to be a real 32 bit user, so this change is done
without compat considerations.

Fixes: 09d208b258a2 ("IB/mlx4: Add report for RSS capabilities by vendor channel")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/include/uapi/rdma/mlx4-abi.h b/include/uapi/rdma/mlx4-abi.h
index a448abd..50a56ae 100644 (file)
--- a/include/uapi/rdma/mlx4-abi.h
+++ b/include/uapi/rdma/mlx4-abi.h
@@ -183,6 +183,7 @@ struct mlx4_uverbs_ex_query_device_resp {
        __u32                   response_length;
        __u64                   hca_core_clock_offset;
        __u32                   max_inl_recv_sz;
+       __u32                   reserved;
        struct mlx4_ib_rss_caps rss_caps;
        struct mlx4_ib_tso_caps tso_caps;
 };