[PATCH net-next] net: dsa: tag_sja1105: appease sparse checks for ethertype accessors

[PATCH net-next] net: dsa: tag_sja1105: appease sparse checks for ethertype accessors

[Vladimir Oltean]

A comparison between a value from the packet and an integer constant
value needs to be done by converting the value from the packet from
net->host, or the constant from host->net. Not the other way around.
Even though it makes no practical difference, correct that.

Fixes: 38b5beeae7a4 ("net: dsa: sja1105: prepare tagger for handling DSA tags and VLAN simultaneously")
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
---
 net/dsa/tag_sja1105.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index ad105550b145..9b4a4d719291 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -73,10 +73,10 @@ static bool sja1105_can_use_vlan_as_tags(const struct sk_buff *skb)
 {
 	struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
 
-	if (hdr->h_vlan_proto == ntohs(ETH_P_SJA1105))
+	if (hdr->h_vlan_proto == htons(ETH_P_SJA1105))
 		return true;
 
-	if (hdr->h_vlan_proto != ntohs(ETH_P_8021Q))
+	if (hdr->h_vlan_proto != htons(ETH_P_8021Q))
 		return false;
 
 	return vid_is_dsa_8021q(ntohs(hdr->h_vlan_TCI) & VLAN_VID_MASK);
-- 
2.17.1

Re: [PATCH net-next] net: dsa: tag_sja1105: appease sparse checks for ethertype accessors

[David Miller]

From: Vladimir Oltean <olteanv@gmail.com>
Date: Wed, 13 May 2020 03:23:27 +0300

> A comparison between a value from the packet and an integer constant
> value needs to be done by converting the value from the packet from
> net->host, or the constant from host->net. Not the other way around.
> Even though it makes no practical difference, correct that.
> 
> Fixes: 38b5beeae7a4 ("net: dsa: sja1105: prepare tagger for handling DSA tags and VLAN simultaneously")
> Signed-off-by: Vladimir Oltean <olteanv@gmail.com>

Applied.