From d9c5716d1d75e652d57b42a514b20145a24eee18 Mon Sep 17 00:00:00 2001 From: Markus Petri Date: Thu, 4 Dec 2025 21:28:51 +0100 Subject: [PATCH] vrx518_tc: fix rx_len_adj 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 Link: https://github.com/openwrt/openwrt/pull/21045 Signed-off-by: Hauke Mehrtens (cherry picked from commit 487178f8b003bf2e06b9f989b46f8b5c36181910) --- .../patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 package/kernel/lantiq/vrx518_tc/patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch diff --git a/package/kernel/lantiq/vrx518_tc/patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch b/package/kernel/lantiq/vrx518_tc/patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch new file mode 100644 index 0000000000..855da162c3 --- /dev/null +++ b/package/kernel/lantiq/vrx518_tc/patches/208-dcdp-ptm_tc-fix-rx_len_adj.patch @@ -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));