realtek: fix RTL839x egress tag for ports >= 32

Don't overwrite AS_DPM and L2LEARNING flags when dest_port is >= 32.

Fixes: 1773264a0c6d ("realtek: correct egress frame port verification")
Signed-off-by: Jan Hoffmann <[email protected]>

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 e96c5a7216f8344cb047087f931fcc06f92ab02e..d497b4cc8caa5dcbd6ad6f6dae2df4492ab98d55 100644 (file)
--- 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
@@ -116,7 +116,7 @@ static void rtl839x_create_tx_header(struct p_hdr *h, unsigned int dest_port, in
        // h->cpu_tag[1] |= BIT(1) | BIT(0); // Bypass filter 1/2
        if (dest_port >= 32) {
                dest_port -= 32;
-               h->cpu_tag[2] = BIT(dest_port) >> 16;
+               h->cpu_tag[2] |= (BIT(dest_port) >> 16) & 0xf;
                h->cpu_tag[3] = BIT(dest_port) & 0xffff;
        } else {
                h->cpu_tag[4] = BIT(dest_port) >> 16;