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https://git.openwrt.org/openwrt/openwrt.git
synced 2024-06-14 11:13:53 +02:00
63ce6fcd20
Fix mac address increment patch. Permit to overflow to the next
byte and correctly calculate the incremented mac.
Reported-by: Chen Minqiang <ptpt52@gmail.com>
Fixes: d284e6ef0f ("treewide: convert mtd-mac-address-increment* to generic implementation")
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
39 lines
872 B
Diff
39 lines
872 B
Diff
--- a/drivers/of/of_net.c
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+++ b/drivers/of/of_net.c
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@@ -89,6 +89,27 @@ static int of_get_mac_addr_nvmem(struct
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return 0;
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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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+
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+ prop = kzalloc(sizeof(*prop), GFP_KERNEL);
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+ if (!prop)
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+ return -ENOMEM;
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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_update_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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/**
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* Search the device tree for the best MAC address to use. 'mac-address' is
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* checked first, because that is supposed to contain to "most recent" MAC
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@@ -165,6 +186,7 @@ found:
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addr[5] = (mac_val >> 0) & 0xff;
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}
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+ of_add_mac_address(np, addr);
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return ret;
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}
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EXPORT_SYMBOL(of_get_mac_address);
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