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IB: Avoid ib_modify_port() failure for RoCE devices
IB CM calls ib_modify_port() irrespective of link layer. If the failure is returned, the mad agent gets unregistered for those devices. Recently, modify_port() hook was removed from some of the low level drivers as it was always returning success. This breaks rdma connection establishment over those devices. For ethernet devices, Qkey violation and port capabilities are not applicable. So returning success for RoCE when modify_port hook is is not implemented. Cc: Leon Romanovsky <leon@kernel.org> Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -1005,14 +1005,17 @@ int ib_modify_port(struct ib_device *device,
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u8 port_num, int port_modify_mask,
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struct ib_port_modify *port_modify)
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{
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if (!device->modify_port)
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return -ENOSYS;
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int rc;
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if (!rdma_is_port_valid(device, port_num))
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return -EINVAL;
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return device->modify_port(device, port_num, port_modify_mask,
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port_modify);
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if (device->modify_port)
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rc = device->modify_port(device, port_num, port_modify_mask,
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port_modify);
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else
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rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS;
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return rc;
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}
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EXPORT_SYMBOL(ib_modify_port);
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