[PATCH net-next 13/13] net: am65-cpsw: deny tc-taprio changes to per-tc max SDU
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STALE1486d
From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: 2022-09-14 15:35:37
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Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Since the driver does not act upon the max_sdu argument, deny any other values except the default all-zeroes, which means that all traffic classes should use the same MTU as the port itself. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- drivers/net/ethernet/ti/am65-cpsw-qos.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ti/am65-cpsw-qos.c b/drivers/net/ethernet/ti/am65-cpsw-qos.c
index e162771893af..bd3b425083aa 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-qos.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-qos.c@@ -503,7 +503,11 @@ static int am65_cpsw_set_taprio(struct net_device *ndev, void *type_data) struct am65_cpsw_port *port = am65_ndev_to_port(ndev); struct tc_taprio_qopt_offload *taprio = type_data; struct am65_cpsw_est *est_new; - int ret = 0; + int tc, ret = 0; + + for (tc = 0; tc < TC_MAX_QUEUE; tc++) + if (taprio->max_sdu[tc]) + return -EOPNOTSUPP; if (taprio->cycle_time_extension) { dev_err(&ndev->dev, "Failed to set cycle time extension");
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2.34.1