This is a note to let you know that I've just added the patch titled net: stmmac: allow a tc-taprio base-time of zero to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-stmmac-allow-a-tc-taprio-base-time-of-zero.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 7272c15b3f37bd15573b730e28343550fddbf16c Author: Vladimir Oltean <vladimir.oltean@xxxxxxx> Date: Mon Nov 8 22:28:54 2021 +0200 net: stmmac: allow a tc-taprio base-time of zero [ Upstream commit f64ab8e4f368f48afb08ae91928e103d17b235e9 ] Commit fe28c53ed71d ("net: stmmac: fix taprio configuration when base_time is in the past") allowed some base time values in the past, but apparently not all, the base-time value of 0 (Jan 1st 1970) is still explicitly denied by the driver. Remove the bogus check. Fixes: b60189e0392f ("net: stmmac: Integrate EST with TAPRIO scheduler API") Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx> Reviewed-by: Kurt Kanzenbach <kurt@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c index 8160087ee92f2..1c4ea0b1b845b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c @@ -786,8 +786,6 @@ static int tc_setup_taprio(struct stmmac_priv *priv, goto disable; if (qopt->num_entries >= dep) return -EINVAL; - if (!qopt->base_time) - return -ERANGE; if (!qopt->cycle_time) return -ERANGE;