On Wed, Feb 19, 2025 at 09:53:49PM -0500, Faizal Rahim wrote: > Since preemptible tc implementation is not ready yet, block it from being > set in taprio. The existing code already blocks it in mqprio. > > Signed-off-by: Faizal Rahim <faizal.abdul.rahim@xxxxxxxxxxxxxxx> > --- > drivers/net/ethernet/intel/igc/igc_main.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c > index 5a6648a12a53..e6a398dbf09b 100644 > --- a/drivers/net/ethernet/intel/igc/igc_main.c > +++ b/drivers/net/ethernet/intel/igc/igc_main.c > @@ -6408,6 +6408,10 @@ 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) && > -- > 2.34.1 > This patch should be before the patch that makes ethtool_dev_mm_supported() return true for igc, i.e. 7/9 "igc: Add support to get MAC Merge data via ethtool". You don't want the kernel to be in a state at all where it accepts a configuration it doesn't support, even if it's temporary and you're fixing it up within the same patch set, because it may be visible during e.g. a git bisect.
