net: enetc: check whether the RSS algorithm is Toeplitz

Both ENETC v1 and v4 only provide Toeplitz RSS support. This patch adds
a validation check to reject attempts to configure other RSS algorithms,
avoiding misleading configuration options for users.

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/20260326075233.3628047-2-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 2fe140ddebb23b0f7fe1c011105a91ef464fbd48..a393647e6062cb3f00daa24f78811fef5ecdf76e 100644 (file)
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -795,6 +795,10 @@ static int enetc_set_rxfh(struct net_device *ndev,
        struct enetc_si *si = priv->si;
        int err = 0;
 
+       if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE &&
+           rxfh->hfunc != ETH_RSS_HASH_TOP)
+               return -EOPNOTSUPP;
+
        /* set hash key, if PF */
        if (rxfh->key && enetc_si_is_pf(si))
                enetc_set_rss_key(si, rxfh->key);