[PATCH 6.19 060/311] net: enetc: do not allow VF to configure the RSS key

Greg Kroah-Hartman
2026-04-08T18:52:22Z

From: Wei Fang <wei.fang@nxp.com>

[ Upstream commit a142d139168cce8d5776245b5494c7f7f5d7fb7d ]

VFs do not have privilege to configure the RSS key because the registers
are owned by the PF. Currently, if VF attempts to configure the RSS key,
enetc_set_rxfh() simply skips the configuration and does not generate a
warning, which may mislead users into thinking the feature is supported.
To improve this situation, add a check to reject RSS key configuration
on VFs.

Fixes: d382563f541b ("enetc: Add RFS and RSS support")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Clark Wang <xiaoning.wang@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Link: https://patch.msgid.link/20260326075233.3628047-3-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/freescale/enetc/enetc_ethtool.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index a393647e6062c..7c17acaf7a380 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -800,8 +800,12 @@ static int enetc_set_rxfh(struct net_device *ndev,
return -EOPNOTSUPP;

/* set hash key, if PF */
- if (rxfh->key && enetc_si_is_pf(si))
+ if (rxfh->key) {
+ if (!enetc_si_is_pf(si))
+ return -EOPNOTSUPP;
+
enetc_set_rss_key(si, rxfh->key);
+ }

/* set RSS table */
if (rxfh->indir)
--
2.53.0