diff options
Diffstat (limited to 'net/ethernet/eth.c')
| -rw-r--r-- | net/ethernet/eth.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 73fce9467467..3ae5f3eb0536 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -534,8 +534,10 @@ EXPORT_SYMBOL(eth_platform_get_mac_address); int nvmem_get_mac_address(struct device *dev, void *addrbuf) { struct nvmem_cell *cell; - const void *mac; + const unsigned char *mac; + unsigned char macaddr[ETH_ALEN]; size_t len; + int i = 0; cell = nvmem_cell_get(dev, "mac-address"); if (IS_ERR(cell)) @@ -547,14 +549,27 @@ int nvmem_get_mac_address(struct device *dev, void *addrbuf) if (IS_ERR(mac)) return PTR_ERR(mac); - if (len != ETH_ALEN || !is_valid_ether_addr(mac)) { - kfree(mac); - return -EINVAL; + if (len != ETH_ALEN) + goto invalid_addr; + + if (dev->of_node && + of_property_read_bool(dev->of_node, "nvmem_macaddr_swap")) { + for (i = 0; i < ETH_ALEN; i++) + macaddr[i] = mac[ETH_ALEN - i - 1]; + } else { + ether_addr_copy(macaddr, mac); } - ether_addr_copy(addrbuf, mac); + if (!is_valid_ether_addr(macaddr)) + goto invalid_addr; + + ether_addr_copy(addrbuf, macaddr); kfree(mac); return 0; + +invalid_addr: + kfree(mac); + return -EINVAL; } EXPORT_SYMBOL(nvmem_get_mac_address); |