From: Pieter Van Trappen Date: Fri, 5 Sep 2025 19:09:03 +0000 (-0400) Subject: net: dsa: microchip: update tag_ksz masks for KSZ9477 family X-Git-Tag: v5.10.243~17 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b21c1ab6ce5580d7fdff5926cc4299778220d40f;p=thirdparty%2Fkernel%2Fstable.git net: dsa: microchip: update tag_ksz masks for KSZ9477 family [ Upstream commit 3f464b193d40e49299dcd087b10cc3b77cbbea68 ] Remove magic number 7 by introducing a GENMASK macro instead. Remove magic number 0x80 by using the BIT macro instead. Signed-off-by: Pieter Van Trappen Reviewed-by: Florian Fainelli Link: https://patch.msgid.link/20240909134301.75448-1-vtpieter@gmail.com Signed-off-by: Jakub Kicinski Stable-dep-of: ba54bce747fa ("net: dsa: microchip: linearize skb for tail-tagging switches") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 230ddf45dff0d..e949d374b26ab 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -103,8 +103,9 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ8795); #define KSZ9477_INGRESS_TAG_LEN 2 #define KSZ9477_PTP_TAG_LEN 4 -#define KSZ9477_PTP_TAG_INDICATION 0x80 +#define KSZ9477_PTP_TAG_INDICATION BIT(7) +#define KSZ9477_TAIL_TAG_EG_PORT_M GENMASK(2, 0) #define KSZ9477_TAIL_TAG_OVERRIDE BIT(9) #define KSZ9477_TAIL_TAG_LOOKUP BIT(10) @@ -135,7 +136,7 @@ static struct sk_buff *ksz9477_rcv(struct sk_buff *skb, struct net_device *dev, { /* Tag decoding */ u8 *tag = skb_tail_pointer(skb) - KSZ_EGRESS_TAG_LEN; - unsigned int port = tag[0] & 7; + unsigned int port = tag[0] & KSZ9477_TAIL_TAG_EG_PORT_M; unsigned int len = KSZ_EGRESS_TAG_LEN; /* Extra 4-bytes PTP timestamp */