RE: [PATCH v2] r8152: Add support for setting MAC to system's Auxiliary MAC address
From: Hayes Wang
Date: Fri Jun 03 2016 - 05:43:56 EST
Mario Limonciello [mailto:mario_limonciello@xxxxxxxx]
> Sent: Friday, June 03, 2016 12:58 AM
[...]
> @@ -500,6 +502,7 @@ enum rtl8152_flags {
> SELECTIVE_SUSPEND,
> PHY_RESET,
> SCHEDULE_NAPI,
> + MAC_PASSTHRU = 0,
I don't think you have to give this a value.
> };
>
[...]
> static int set_ethernet_addr(struct r8152 *tp)
> {
> struct net_device *dev = tp->netdev;
> @@ -1041,6 +1088,10 @@ static int set_ethernet_addr(struct r8152 *tp)
> else
> ret = pla_ocp_read(tp, PLA_BACKUP, 8, sa.sa_data);
>
> + /* if system provides auxiliary MAC address */
> + if (get_auxiliary_addr(tp, &sa))
> + ret = 0;
It still has problem when tp->version == RTL_VER_01.
First, you would read the current MAC address (MAC1) to sa.sa_data.
Then sa.sa_data may be modified by MAC2 after get_auxiliary_addr().
However, the MAC2 wouldn't be set to the device, because
if (tp->version == RTL_VER_01)
ether_addr_copy(dev->dev_addr, sa.sa_data);
Therefore, you would find that dev_addr is MAC2, and the device
uses MAC1.
Best Regards,
Hayes