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authorThomas Huth <thuth@redhat.com>2017-01-24 07:28:41 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-24 15:15:21 -0500
commit23d28a859fb847fd7fcfbd31acb3b160abb5d6ae (patch)
tree02068f097008fb84ee62324d025038fcdffd7b53 /drivers/parisc/Makefile
parent7d6556ac66eeb430a574e9e3381a3110965d17aa (diff)
ibmveth: Add a proper check for the availability of the checksum features
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 <thuth@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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