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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: 7193a141eb ('IB/mlx4: Set VF to read from QP counters')
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Or Gerlitz 2015-06-25 17:45:38 +03:00 committed by Doug Ledford
parent cb1ff431c3
commit 43bfb9729e
1 changed files with 19 additions and 10 deletions
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29
drivers/infiniband/hw/mlx4/mad.c
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@ -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);
const struct ib_mad *in_mad = (const struct ib_mad *)in;
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) ||
*out_mad_size != sizeof(*out_mad)))
return IB_MAD_RESULT_FAILURE;
switch (rdma_port_get_link_layer(ibdev, port_num)) {
case IB_LINK_LAYER_INFINIBAND:
if (!mlx4_is_slave(dev->dev))
return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
case IB_LINK_LAYER_ETHERNET:
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
default:
return -EINVAL;
/* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
* queries, should be called only by VFs and for that specific purpose
*/
if (link == IB_LINK_LAYER_INFINIBAND) {
if (mlx4_is_slave(dev->dev) &&
in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS)
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
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,