Commit 43bfb972 authored by Or Gerlitz's avatar Or Gerlitz Committed by Doug Ledford

IB/mlx4: Fix use of flow-counters for process_mad

For IB links, reading HCA flow counters through iboe_process_mad() should
be used when mlx4_ib_process_mad() is invoked only for VFs PMA queries and
exactly nothing else.

Fixes: 7193a141 ('IB/mlx4: Set VF to read from QP counters')
Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent cb1ff431
...@@ -860,22 +860,31 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, ...@@ -860,22 +860,31 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
struct mlx4_ib_dev *dev = to_mdev(ibdev); struct mlx4_ib_dev *dev = to_mdev(ibdev);
const struct ib_mad *in_mad = (const struct ib_mad *)in; const struct ib_mad *in_mad = (const struct ib_mad *)in;
struct ib_mad *out_mad = (struct ib_mad *)out; struct ib_mad *out_mad = (struct ib_mad *)out;
enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) || if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
*out_mad_size != sizeof(*out_mad))) *out_mad_size != sizeof(*out_mad)))
return IB_MAD_RESULT_FAILURE; return IB_MAD_RESULT_FAILURE;
switch (rdma_port_get_link_layer(ibdev, port_num)) { /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
case IB_LINK_LAYER_INFINIBAND: * queries, should be called only by VFs and for that specific purpose
if (!mlx4_is_slave(dev->dev)) */
return ib_process_mad(ibdev, mad_flags, port_num, in_wc, if (link == IB_LINK_LAYER_INFINIBAND) {
in_grh, in_mad, out_mad); if (mlx4_is_slave(dev->dev) &&
case IB_LINK_LAYER_ETHERNET: in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS)
in_grh, in_mad, out_mad); return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
default: in_grh, in_mad, out_mad);
return -EINVAL;
return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
} }
if (link == IB_LINK_LAYER_ETHERNET)
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
return -EINVAL;
} }
static void send_handler(struct ib_mad_agent *agent, static void send_handler(struct ib_mad_agent *agent,
......
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