From b63f68e409f2ec2ab04d84bf6bb4bcad3776d089 Mon Sep 17 00:00:00 2001 From: Jonas Jelonek Date: Fri, 2 Jan 2026 18:50:10 +0000 Subject: [PATCH] realtek: pcs: select OFF mode with no links on SerDes Because the PCS driver keeps track of the number of registered links for each SerDes now, we now know when there is no link on a SerDes. In this case, determine to turn off the SerDes in the mode mapper. Though the phylink subsystem shouldn't attempt to config something different when no link/port references a Serdes, be on the safe side. Signed-off-by: Jonas Jelonek Link: https://github.com/openwrt/openwrt/pull/21365 Signed-off-by: Hauke Mehrtens --- .../linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c index bd19bd5fb2..06647938d2 100644 --- a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c +++ b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c @@ -287,6 +287,12 @@ static int rtpcs_sds_determine_hw_mode(struct rtpcs_serdes *sds, { u8 n_links = sds->num_of_links; + /* turn off SerDes when there are no links */ + if (!n_links) { + *hw_mode = RTPCS_SDS_MODE_OFF; + return 0; + } + switch (if_mode) { case PHY_INTERFACE_MODE_NA: *hw_mode = RTPCS_SDS_MODE_OFF;