From: Burak Aydos Date: Tue, 3 Feb 2026 20:38:01 +0000 (+0300) Subject: lantiq: xrx200: handle EPROBE_DEFER for MAC address X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=50e7e5c80d9269e7a6e947688ffb4cec895d1237;p=openwrt%2Fopenwrt.git lantiq: xrx200: handle EPROBE_DEFER for MAC address The xrx200 ethernet driver falls back to a random MAC address on any error from of_get_ethdev_address(), including -EPROBE_DEFER. When the MAC address comes from an nvmem layout driver (such as u-boot-env on NAND), the nvmem cell may not be available yet at first probe attempt. Fix this by propagating EPROBE_DEFER so the driver probe is deferred until the nvmem cell becomes available. Tested on Zyxel P-2812HNU-F1 (NAND, u-boot-env nvmem layout). Signed-off-by: Burak Aydos Link: https://github.com/openwrt/openwrt/pull/21861 Signed-off-by: Hauke Mehrtens --- diff --git a/target/linux/lantiq/patches-6.12/0801-net-ethernet-lantiq-xrx200-handle-EPROBE_DEFER-for-MAC-address.patch b/target/linux/lantiq/patches-6.12/0801-net-ethernet-lantiq-xrx200-handle-EPROBE_DEFER-for-MAC-address.patch new file mode 100644 index 0000000000..0d7ecd9bf8 --- /dev/null +++ b/target/linux/lantiq/patches-6.12/0801-net-ethernet-lantiq-xrx200-handle-EPROBE_DEFER-for-MAC-address.patch @@ -0,0 +1,30 @@ +From: Burak Aydos +Date: Mon, 03 Feb 2026 12:00:00 +0300 +Subject: [PATCH] net: ethernet: lantiq: xrx200: handle EPROBE_DEFER for MAC + address + +When the MAC address is provided by an nvmem layout driver (such as +u-boot-env), the nvmem cell may not be available yet when the ethernet +driver probes. In this case, of_get_ethdev_address() returns +-EPROBE_DEFER to indicate the driver should be retried later. + +Currently the driver treats all errors equally and falls back to a +random MAC address. Fix this by propagating EPROBE_DEFER so the +driver probe is deferred until the nvmem cell becomes available. + +Signed-off-by: Burak Aydos +--- + drivers/net/ethernet/lantiq_xrx200.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/net/ethernet/lantiq_xrx200.c ++++ b/drivers/net/ethernet/lantiq_xrx200.c +@@ -597,6 +597,8 @@ static int xrx200_probe(struct platform_ + } + + err = of_get_ethdev_address(np, net_dev); ++ if (err == -EPROBE_DEFER) ++ return err; + if (err) + eth_hw_addr_random(net_dev); +