netdev - Re: [PATCH net-next 2/2] net: stmmac: add tc flower filter for EtherType matching

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Date:   Fri, 10 Dec 2021 11:10:04 +0100
From:   Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>
To:     Ong Boon Leong <boon.leong.ong@...el.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        alexandre.torgue@...s.st.com
Cc:     netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH net-next 2/2] net: stmmac: add tc flower filter for
 EtherType matching

On Thu Dec 09 2021, Ong Boon Leong wrote:
> This patch adds basic support for EtherType RX frame steering for
> LLDP and PTP using the hardware offload capabilities.
>
> Signed-off-by: Ong Boon Leong <boon.leong.ong@...el.com>

[snip]

> +	if (match.mask->n_proto) {
> +		__be16 etype = ntohs(match.key->n_proto);

n_proto is be16. The ntohs() call will produce an u16.

Delta patch below.

Thanks,
Kurt

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 35ff7c835018..d64e42308eb6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -182,7 +182,7 @@ enum stmmac_rfs_type {
 
 struct stmmac_rfs_entry {
        unsigned long cookie;
-       __be16 etype;
+       u16 etype;
        int in_use;
        int type;
        int idx;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index cb7400943bb0..afa918185cf7 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -759,7 +759,7 @@ static int tc_add_ethtype_flow(struct stmmac_priv *priv,
        flow_rule_match_basic(rule, &match);
 
        if (match.mask->n_proto) {
-               __be16 etype = ntohs(match.key->n_proto);
+               u16 etype = ntohs(match.key->n_proto);
 
                if (match.mask->n_proto != ETHER_TYPE_FULL_MASK) {
                        netdev_err(priv->dev, "Only full mask is supported for EthType filter");

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