6.6-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Wahren wahrenst@gmx.net
[ Upstream commit d2d3f529e7b6ff2aa432b16a2317126621c28058 ]
A lot of modern SoC have the ability to store MAC addresses in their NVMEM. So extend the generic function device_get_mac_address() to obtain the MAC address from an nvmem cell named 'mac-address' in case there is no firmware node which contains the MAC address directly.
Signed-off-by: Stefan Wahren wahrenst@gmx.net Reviewed-by: Andrew Lunn andrew@lunn.ch Link: https://patch.msgid.link/20250912140332.35395-3-wahrenst@gmx.net Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ethernet/eth.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 049c3adeb8504..b4a6e26ec2871 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -615,7 +615,10 @@ EXPORT_SYMBOL(fwnode_get_mac_address); */ int device_get_mac_address(struct device *dev, char *addr) { - return fwnode_get_mac_address(dev_fwnode(dev), addr); + if (!fwnode_get_mac_address(dev_fwnode(dev), addr)) + return 0; + + return nvmem_get_mac_address(dev, addr); } EXPORT_SYMBOL(device_get_mac_address);