[PATCH 32/38] net: ethernet: sgi: ioc3-eth: fall back to the platform MAC address
HOTtoday
From: Imre Kaloz <kaloz@kernel.org>
Date: 2026-10-01 16:14:24
Also in:
linux-mips, lkml
Subsystem:
ioc3 ethernet driver, networking drivers, the rest · Maintainers:
Thomas Bogendoerfer, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The IOC3 on Fuel's system board has no MAC PROM on its 1-wire bus, so ioc3eth_get_mac_addr() cannot succeed there and the probe defers for ever. Ask eth_platform_get_mac_address() before deferring; on IP35 machines it answers from the L1 system controller. Once deferred probing gives up with neither source answering, use a random address. Signed-off-by: Imre Kaloz <kaloz@kernel.org> --- drivers/net/ethernet/sgi/ioc3-eth.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 8702dfdf4c36..85b49e7b0f79 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c@@ -857,9 +857,16 @@ static int ioc3eth_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Invalid resource\n"); return -EINVAL; } - /* get mac addr from one wire prom */ - if (ioc3eth_get_mac_addr(regs, mac_addr)) - return -EPROBE_DEFER; /* not available yet */ + /* get mac addr from one wire prom, or from the platform */ + if (ioc3eth_get_mac_addr(regs, mac_addr) && + eth_platform_get_mac_address(&pdev->dev, mac_addr)) { + err = driver_deferred_probe_check_state(&pdev->dev); + if (err == -EPROBE_DEFER) + return err; /* not available yet */ + + dev_warn(&pdev->dev, "no MAC address, using a random one\n"); + eth_random_addr(mac_addr); + } dev = alloc_etherdev(sizeof(struct ioc3_private)); if (!dev)
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2.47.3