diff options
| author | Burak Aydos | 2026-02-03 20:38:01 +0000 |
|---|---|---|
| committer | Hauke Mehrtens | 2026-02-07 14:27:11 +0000 |
| commit | 50e7e5c80d9269e7a6e947688ffb4cec895d1237 (patch) | |
| tree | ebf75ab618a942ad19a5a7fe64f2e002c84c66cb | |
| parent | 09de75950678db1d41aeb5840b41af432a4d4163 (diff) | |
| download | nbd-50e7e5c80d9269e7a6e947688ffb4cec895d1237.tar.gz | |
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 <byhexadecimal@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21861
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
| -rw-r--r-- | target/linux/lantiq/patches-6.12/0801-net-ethernet-lantiq-xrx200-handle-EPROBE_DEFER-for-MAC-address.patch | 30 |
1 files changed, 30 insertions, 0 deletions
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 <byhexadecimal@gmail.com> +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 <byhexadecimal@gmail.com> +--- + 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); + |