From: Thomas Huth <th...@redhat.com> Date: Tue, 24 Jan 2017 07:28:41 +0100
> When using the ibmveth driver in a KVM/QEMU based VM, it currently > always prints out a scary error message like this when it is started: > > ibmveth 71000003 (unregistered net_device): unable to change > checksum offload settings. 1 rc=-2 ret_attr=71000003 > > This happens because the driver always tries to enable the checksum > offloading without checking for the availability of this feature first. > QEMU does not support checksum offloading for the spapr-vlan device, > thus we always get the error message here. > According to the LoPAPR specification, the "ibm,illan-options" property > of the corresponding device tree node should be checked first to see > whether the H_ILLAN_ATTRIUBTES hypercall and thus the checksum offloading > feature is available. Thus let's do this in the ibmveth driver, too, so > that the error message is really only limited to cases where something > goes wrong, and does not occur if the feature is just missing. > > Signed-off-by: Thomas Huth <th...@redhat.com> Applied.
