[PATCH net-next 1/2] net: dsa: tag_yt921x: fix priority support
From: David Yang <mmyangfl@gmail.com>
Date: 2026-01-19 19:00:27
Also in:
lkml
Subsystem:
motorcomm yt921x ethernet switch driver, networking [dsa], networking [general], the rest · Maintainers:
David Yang, Andrew Lunn, Vladimir Oltean, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The packet priority is embedded in the rx tag. It defaults to 0, but adding DCB support to the switch driver will break the tag driver by setting it to non-zero. Signed-off-by: David Yang <mmyangfl@gmail.com> --- net/dsa/tag_yt921x.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/dsa/tag_yt921x.c b/net/dsa/tag_yt921x.c
index 6bbfd42dc5df..b93715a057c7 100644
--- a/net/dsa/tag_yt921x.c
+++ b/net/dsa/tag_yt921x.c@@ -17,7 +17,8 @@ * 2: Rx Port * 15b: Rx Port Valid * 14b-11b: Rx Port - * 10b-0b: Cmd? + * 10b-8b: Priority + * 7b-0b: Cmd * 2: Tx Port(s) * 15b: Tx Port(s) Valid * 10b-0b: Tx Port(s) Mask
@@ -33,7 +34,8 @@ #define YT921X_TAG_PORT_EN BIT(15) #define YT921X_TAG_RX_PORT_M GENMASK(14, 11) -#define YT921X_TAG_RX_CMD_M GENMASK(10, 0) +#define YT921X_TAG_RX_PRIO_M GENMASK(10, 8) +#define YT921X_TAG_RX_CMD_M GENMASK(7, 0) #define YT921X_TAG_RX_CMD(x) FIELD_PREP(YT921X_TAG_RX_CMD_M, (x)) #define YT921X_TAG_RX_CMD_FORWARDED 0x80 #define YT921X_TAG_RX_CMD_UNK_UCAST 0xb2
@@ -98,6 +100,8 @@ yt921x_tag_rcv(struct sk_buff *skb, struct net_device *netdev) return NULL; } + skb->priority = FIELD_GET(YT921X_TAG_RX_PRIO_M, rx); + cmd = FIELD_GET(YT921X_TAG_RX_CMD_M, rx); switch (cmd) { case YT921X_TAG_RX_CMD_FORWARDED:
--
2.51.0