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r8152: Refresh MAC address during USBDEVFS_RESET

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On some platforms it is possible to dynamically change the policy
of what MAC address is selected from the ASL at runtime.

These tools will reset the USB device and expect the change to be
made immediately.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mario Limonciello 2019-04-04 13:46:53 -05:00 committed by David S. Miller
parent 78fdde30d4
commit 25766271e4
1 changed files with 45 additions and 25 deletions
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70
drivers/net/usb/r8152.c
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@ -1220,39 +1220,51 @@ amacout:
return ret;
}
static int determine_ethernet_addr(struct r8152 *tp, struct sockaddr *sa)
{
struct net_device *dev = tp->netdev;
int ret;
if (tp->version == RTL_VER_01) {
ret = pla_ocp_read(tp, PLA_IDR, 8, sa->sa_data);
} else {
/* if device doesn't support MAC pass through this will
* be expected to be non-zero
*/
ret = vendor_mac_passthru_addr_read(tp, sa);
if (ret < 0)
ret = pla_ocp_read(tp, PLA_BACKUP, 8, sa->sa_data);
}
if (ret < 0) {
netif_err(tp, probe, dev, "Get ether addr fail\n");
} else if (!is_valid_ether_addr(sa->sa_data)) {
netif_err(tp, probe, dev, "Invalid ether addr %pM\n",
sa->sa_data);
eth_hw_addr_random(dev);
ether_addr_copy(sa->sa_data, dev->dev_addr);
netif_info(tp, probe, dev, "Random ether addr %pM\n",
sa->sa_data);
return 0;
}
return ret;
}
static int set_ethernet_addr(struct r8152 *tp)
{
struct net_device *dev = tp->netdev;
struct sockaddr sa;
int ret;
if (tp->version == RTL_VER_01) {
ret = pla_ocp_read(tp, PLA_IDR, 8, sa.sa_data);
} else {
/* if device doesn't support MAC pass through this will
* be expected to be non-zero
*/
ret = vendor_mac_passthru_addr_read(tp, &sa);
if (ret < 0)
ret = pla_ocp_read(tp, PLA_BACKUP, 8, sa.sa_data);
}
ret = determine_ethernet_addr(tp, &sa);
if (ret < 0)
return ret;
if (ret < 0) {
netif_err(tp, probe, dev, "Get ether addr fail\n");
} else if (!is_valid_ether_addr(sa.sa_data)) {
netif_err(tp, probe, dev, "Invalid ether addr %pM\n",
sa.sa_data);
eth_hw_addr_random(dev);
ether_addr_copy(sa.sa_data, dev->dev_addr);
if (tp->version == RTL_VER_01)
ether_addr_copy(dev->dev_addr, sa.sa_data);
else
ret = rtl8152_set_mac_address(dev, &sa);
netif_info(tp, probe, dev, "Random ether addr %pM\n",
sa.sa_data);
} else {
if (tp->version == RTL_VER_01)
ether_addr_copy(dev->dev_addr, sa.sa_data);
else
ret = rtl8152_set_mac_address(dev, &sa);
}
return ret;
}
@ -4263,10 +4275,18 @@ static int rtl8152_post_reset(struct usb_interface *intf)
{
struct r8152 *tp = usb_get_intfdata(intf);
struct net_device *netdev;
struct sockaddr sa;
if (!tp)
return 0;
/* reset the MAC adddress in case of policy change */
if (determine_ethernet_addr(tp, &sa) >= 0) {
rtnl_lock();
dev_set_mac_address (tp->netdev, &sa, NULL);
rtnl_unlock();
}
netdev = tp->netdev;
if (!netif_running(netdev))
return 0;