igc: block setting preemptible traffic class in taprio

Since preemptible tc implementation is not ready yet, block it from being
set in taprio. The existing code already blocks it in mqprio.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
Tested-by: Mor Bar-Gabay <morx.bar.gabay@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index d160da49b0d28b02a40eab70ad6978b38187505b..5b06765a35e9a20e01f82002bb64440ce2390a20 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6486,6 +6486,10 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
        if (!validate_schedule(adapter, qopt))
                return -EINVAL;
 
+       /* preemptible isn't supported yet */
+       if (qopt->mqprio.preemptible_tcs)
+               return -EOPNOTSUPP;
+
        igc_ptp_read(adapter, &now);
 
        if (igc_tsn_is_taprio_activated_by_user(adapter) &&