On Tue, Mar 14, 2017 at 04:42:55PM +0200, Erez Shitrit wrote:
> >> + if (!hca->alloc_rdma_netdev)
> >> + dev = ipoib_create_netdev_default(hca, name,
> >> ipoib_setup_common);
> >> + else
> >> + dev = hca->alloc_rdma_netdev(hca, port, RDMA_NETDEV_IPOIB,
> >> + name, NET_NAME_UNKNOWN,
> >> + ipoib_setup_common);
> >> + if (!dev) {
> >> + kfree(priv);
> >> + return NULL;
> >> + }
> >
> >
> > This will break ipoib on hfi1 as hfi1 will define alloc_rdma_netdev for
> > OPA_VNIC type. We should probably look for a dedicated return type
> > (-ENODEV?) to determine of the driver supports specified rdma netdev type.
> > Or use a ib device attribute to suggest driver support ipoib rdma netdev.
>
> sorry, I don't understand that, we are in ipoib driver, so the type is
> RDMA_NETDEV_IPOIB, if hfi wants to implement it should use the same
> flag, and to use OPA_VNIC for vnic.
He means it should look like this:
if (hca->alloc_rdma_netdev)
dev = hca->alloc_rdma_netdev(hca, port, RDMA_NETDEV_IPOIB,
name, NET_NAME_UNKNOWN,
ipoib_setup_common);
if (IS_ERR(dev) && PTR_ERR(dev) != ENOTSUP)
goto out;
dev = ipoib_create_netdev_default(hca, name, ipoib_setup_common);
if (IS_ERR(dev))
goto out;
WARN_ON(dev == NULL);
[...]
out:
return PTR_ERR(dev);
And I'm confused why 'ipoib_create_netdev_default' doesn't need the
same function signature as hca->alloc_rdma_netdev
Both drivers should implement hca->alloc_rdma_netdev to return ENOTSUP
if RDMA_NETDEV is not supported.
Jason
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