tree 1cd22fe98bef1fc0c244be4b24762b7067b7d5a0
parent 14d9fb02c26133f637b3184fb4c766098e2f635e
author Dr. David Alan Gilbert <dgilbert@redhat.com> 1403895768 +0100
committer Michael Roth <mdroth@linux.vnet.ibm.com> 1405470482 -0500

Allow mismatched virtio config-len

Commit 'virtio: validate config_len on load' restricted config_len
loaded from the wire to match the config_len that the device had.

Unfortunately, there are cases where this isn't true, the one
we found it on was the wce addition in virtio-blk.

Allow mismatched config-lengths:
   *) If the version on the wire is shorter then fine
   *) If the version on the wire is longer, load what we have space
      for and skip the rest.

(This is mst@redhat.com's rework of what I originally posted)

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 2f5732e9648fcddc8759a8fd25c0b41a38352be6)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>