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vrx518_tc: fix rx_len_adj

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Fix rx_len_adj to avoid leaking the ethernet FCS into the actual frame
data in single line mode (the default)

Fixes: https://github.com/openwrt/openwrt/issues/20983
Signed-off-by: Markus Petri <devel@isjunk.org>
Link: https://github.com/openwrt/openwrt/pull/21045
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Markus Petri
2025-12-04 21:28:51 +01:00
committed by Hauke Mehrtens
parent 7bfe7788b1
commit 487178f8b0
1 changed files with 14 additions and 0 deletions
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14
package/kernel/lantiq/vrx518_tc/patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch Normal file
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@@ -0,0 +1,14 @@
Fixes leaking the ethernet FCS into the frame payload on the RX
path.
--- a/dcdp/ptm_tc.c
+++ b/dcdp/ptm_tc.c
@@ -923,7 +923,7 @@ static void ptm_fw_init(struct ptm_ep_pr
rx_gitf_cfg.rx_inserted_bytes_1h = 0;
rx_gitf_cfg.rx_inserted_bytes_2l = 0;
rx_gitf_cfg.rx_inserted_bytes_2h = 0;
- rx_gitf_cfg.rx_len_adj = -2;
+ rx_gitf_cfg.rx_len_adj = is_bonding ? -2 : -6;
for (i = 0; i < 4; i++) {
dst_addr = __RX_GIF0_CFG_STATS_CFG +
(i * DW_SZ(rx_gitf_cfg));