i40e: provide correct API version to older VF drivers

This driver fully supports VF drivers using both the 1.0 and 1.1
versions of the virtual channel API. However, VF drivers using
version 1.0 get upset if we provide them with a version other than
that, and refuse to play with us.

Correct this by checking the VFs API version at the time that we
store it off, and provide the correct version number back to the VF
so we can all get along.

Change-ID: I86dfe02e67b2bef336b4b49a1bb072f3e7229abc
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 176a2898f1ad1ee160b307bd1504f4be6d81af1e..51aff707219568e231700290f2a607c29e8f4696 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1128,6 +1128,9 @@ static int i40e_vc_get_version_msg(struct i40e_vf *vf, u8 *msg)
        };
 
        vf->vf_ver = *(struct i40e_virtchnl_version_info *)msg;
+       /* VFs running the 1.0 API expect to get 1.0 back or they will cry. */
+       if (VF_IS_V10(vf))
+               info.minor = I40E_VIRTCHNL_VERSION_MINOR_NO_VF_CAPS;
        return i40e_vc_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_VERSION,
                                      I40E_SUCCESS, (u8 *)&info,
                                      sizeof(struct