diff options
| -rw-r--r-- | include/net.h | 4 | ||||
| -rw-r--r-- | net/eth.c | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/net.h b/include/net.h index b9c13f282c..d09bec9de1 100644 --- a/include/net.h +++ b/include/net.h @@ -119,7 +119,9 @@ enum eth_recv_flags { * mcast: Join or leave a multicast group (for TFTP) - optional * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux * on some platforms like ARM). This function expects the - * eth_pdata::enetaddr field to be populated - optional + * eth_pdata::enetaddr field to be populated. The method can + * return -ENOSYS to indicate that this is not implemented for + this hardware - optional. * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a * ROM on the board. This is how the driver should expose it * to the network stack. This function should fill in the @@ -287,7 +287,13 @@ static int eth_write_hwaddr(struct udevice *dev) return -EINVAL; } + /* + * Drivers are allowed to decide not to implement this at + * run-time. E.g. Some devices may use it and some may not. + */ ret = eth_get_ops(dev)->write_hwaddr(dev); + if (ret == -ENOSYS) + ret = 0; if (ret) printf("\nWarning: %s failed to set MAC address\n", dev->name); |