[openwrt/openwrt] realtek: fix egress L2 learning on rtl839x

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/d6165ea75baea4f9039f3a378d55219c74b932a7

commit d6165ea75baea4f9039f3a378d55219c74b932a7
Author: Sander Vanheule <sander at svanheule.net>
AuthorDate: Tue Jun 28 21:15:00 2022 +0200

    realtek: fix egress L2 learning on rtl839x
    
    The flag to enable L2 address learning on egress frames is in CPU header
    bit 40, with bit 0 being the leftmost bit of the header. This
    corresponds to BIT(7) in the third 16-bit value of the header.
    
    Correctly set L2LEARNING by fixing the off-by-one error.
    
    Fixes: 9eab76c84e31 ("realtek: Improve TX CPU-Tag usage")
    Tested-by: Luiz Angelo Daros de Luca <luizluca at gmail.com>
    Signed-off-by: Sander Vanheule <sander at svanheule.net>
---
 target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c b/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
index aece1356e4..8c7813015a 100644
--- a/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
+++ b/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
@@ -127,7 +127,7 @@ static void rtl839x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
 			h->cpu_tag[5] = BIT(dest_port) & 0xffff;
 		}
 		h->cpu_tag[2] |= BIT(4); // Enable destination port mask use
-		h->cpu_tag[2] |= BIT(8); // Enable L2 Learning
+		h->cpu_tag[2] |= BIT(7); // Enable L2 Learning
 		// Set internal priority and AS_PRIO
 		if (prio >= 0)
 			h->cpu_tag[1] |= prio | BIT(3);