cd39aba402
The label-mac logic relies on the mac-address property of a netdev devices of-node. However, the mac address can also be stored as a different property or read from e.g. an mtd device. Create this node when reading a mac-address from OF if it does not already exist and copy the mac-address used for the device to this property. This way, the MAC address can be accessed using procfs. Signed-off-by: David Bauer <mail@david-bauer.net>
45 lines
979 B
Diff
45 lines
979 B
Diff
--- a/drivers/of/of_net.c
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+++ b/drivers/of/of_net.c
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@@ -125,6 +125,33 @@ static void *of_get_mac_address_mtd(stru
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#endif
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}
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+static int of_add_mac_address(struct device_node *np, u8* addr)
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+{
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+ struct property *prop;
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+ u8 *np_addr;
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+
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+ np_addr = of_get_mac_addr(np, "mac-address");
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+ if (np_addr) {
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+ memcpy(np_addr, addr, ETH_ALEN);
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+ return 0;
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+ }
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+
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+ prop = kzalloc(sizeof(*prop), GFP_KERNEL);
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+ if (!prop)
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+ return 0;
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+
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+ prop->name = "mac-address";
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+ prop->length = ETH_ALEN;
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+ prop->value = kmemdup(addr, ETH_ALEN, GFP_KERNEL);
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+ if (!prop->value || of_add_property(np, prop))
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+ goto free;
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+
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+ return 0;
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+free:
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+ kfree(prop->value);
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+ kfree(prop);
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+ return -ENOMEM;
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+}
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/**
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* Search the device tree for the best MAC address to use. 'mac-address' is
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@@ -198,6 +225,7 @@ found:
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if (!of_property_read_u32(np, "mac-address-increment", &mac_inc))
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addr[inc_idx] += mac_inc;
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+ of_add_mac_address(np, addr);
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return addr;
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}
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EXPORT_SYMBOL(of_get_mac_address);
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