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IB: Avoid ib_modify_port() failure for RoCE devices

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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>
This commit is contained in:
Selvin Xavier 2017-08-23 01:08:07 -07:00 committed by Doug Ledford
parent a31a2a3b27
commit 61e0962d52
1 changed files with 7 additions and 4 deletions
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11
drivers/infiniband/core/device.c
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@ -1005,14 +1005,17 @@ int ib_modify_port(struct ib_device *device,
u8 port_num, int port_modify_mask,
struct ib_port_modify *port_modify)
{
if (!device->modify_port)
return -ENOSYS;
int rc;
if (!rdma_is_port_valid(device, port_num))
return -EINVAL;
return device->modify_port(device, port_num, port_modify_mask,
port_modify);
if (device->modify_port)
rc = device->modify_port(device, port_num, port_modify_mask,
port_modify);
else
rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS;
return rc;
}
EXPORT_SYMBOL(ib_modify_port);