bgmac: validate (and random if needed) MAC addr

This adds check for a valid Ethernet MAC address and in case it is not,
it will generate a valid random one, such that the adapter is still
usable.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 23c8d4a21ccf..380084bad129 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1318,6 +1318,12 @@ static int bgmac_probe(struct bcma_device *core)
                 return -ENOTSUPP;
         }
 
+        if (!is_valid_ether_addr(mac)) {
+                dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac);
+                eth_random_addr(mac);
+                dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
+        }
+
         /* Allocation and references */
         net_dev = alloc_etherdev(sizeof(*bgmac));
         if (!net_dev)