diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0071-of-of_net-write-back-netdev-MAC-address-to-device-tr.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0071-of-of_net-write-back-netdev-MAC-address-to-device-tr.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/nixos/modules/kernel-patches/0071-of-of_net-write-back-netdev-MAC-address-to-device-tr.patch b/nixos/modules/kernel-patches/0071-of-of_net-write-back-netdev-MAC-address-to-device-tr.patch new file mode 100644 index 0000000..acbd2c9 --- /dev/null +++ b/nixos/modules/kernel-patches/0071-of-of_net-write-back-netdev-MAC-address-to-device-tr.patch @@ -0,0 +1,59 @@ +From 351deef2622af5e81dcd714743809ca7720ad0b7 Mon Sep 17 00:00:00 2001 +From: OpenWrt community <openwrt-devel@lists.openwrt.org> +Date: Wed, 13 Jul 2022 12:22:48 +0200 +Subject: [PATCH 71/96] of/of_net: write back netdev MAC-address to device-tree + +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. +--- + net/core/of_net.c | 22 ++++++++++++++++++++++ + 1 file changed, 22 insertions(+) + +diff --git a/net/core/of_net.c b/net/core/of_net.c +index 44c7cb0dbbe7..f1fa0aac725c 100644 +--- a/net/core/of_net.c ++++ b/net/core/of_net.c +@@ -95,6 +95,27 @@ static int of_get_mac_addr_nvmem(struct device_node *np, u8 *addr) + return 0; + } + ++static int of_add_mac_address(struct device_node *np, u8* addr) ++{ ++ struct property *prop; ++ ++ prop = kzalloc(sizeof(*prop), GFP_KERNEL); ++ if (!prop) ++ return -ENOMEM; ++ ++ prop->name = "mac-address"; ++ prop->length = ETH_ALEN; ++ prop->value = kmemdup(addr, ETH_ALEN, GFP_KERNEL); ++ if (!prop->value || of_update_property(np, prop)) ++ goto free; ++ ++ return 0; ++free: ++ kfree(prop->value); ++ kfree(prop); ++ return -ENOMEM; ++} ++ + /** + * of_get_mac_address() + * @np: Caller's Device Node +@@ -175,6 +196,7 @@ int of_get_mac_address(struct device_node *np, u8 *addr) + addr[5] = (mac_val >> 0) & 0xff; + } + ++ of_add_mac_address(np, addr); + return ret; + } + EXPORT_SYMBOL(of_get_mac_address); +-- +2.37.2 + |