tg3: use random MAC address when tg3_get_device_address fails

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Some of the tg3 NICs we use (BCM57762) reset the SRAM MAC address to the
placeholder address on link flaps, tg3_chip_reset, etc. We've typically
fixed it from userspace, but since e4c00ba727 ("tg3: replace
placeholder MAC address with device property") was merged, tg3 just
fails probe as we don't have a way to get it through the generic
device_get_mac_address infrastructure as fallback on our systems.

Make the driver assign a random address in this condition instead of
being fatal for probe. Set deferred_probe_reason through dev_warn_probe
if the address isn't yet available from the provider.

Fixes: e4c00ba727 ("tg3: replace placeholder MAC address with device property")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/netdev/20260909191751.651aa5c4@kernel.org/
Signed-off-by: Ivan Delalande <colona@arista.com>
Link: https://patch.msgid.link/20260918224715.GA654128@visor
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Ivan Delalande 2026-09-18 15:47:15 -07:00 • committed by Jakub Kicinski

parent d8b6529e80

commit 4eb3f195ef

1 changed files with 7 additions and 4 deletions

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drivers/net/ethernet/broadcom/tg3.c

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