Commit afdb3df2 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'r8152-runtime-mac-changes' 



Mario Limonciello says:

====================
r8152: Support runtime changes of vendor mac passthu policy

On some platforms ACPI method `\\_SB.AMAC` is dynamic and changes to it can
influence changing the behavior of MAC pass through and what MAC address is used.

When running USB reset, re-read the MAC address to use to support tools that
change the policy.

This is quite similar to using `SIOCSIFHWADDR` except that the actual MAC to use
comes from ASL rather than from userspace.

Changes from v1:
 * Remove an extra unneeded `ether_addr_copy` call
 * Use `dev_set_mac_address` to ensure all notifiers are called
 * Shuffle functions to allow code re-use.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents d1edc085 25766271

drivers/net/usb/r8152.c

+35 −16
Original line number Diff line number Diff line
@@ -1212,7 +1212,6 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa) 
		goto amacout;

	}

	memcpy(sa->sa_data, buf, 6);

	ether_addr_copy(tp->netdev->dev_addr, sa->sa_data);

	netif_info(tp, probe, tp->netdev,

		   "Using pass-thru MAC addr %pM\n", sa->sa_data);
@@ -1221,39 +1220,51 @@ amacout: 
	return ret;

}



static int set_ethernet_addr(struct r8152 *tp)

static int determine_ethernet_addr(struct r8152 *tp, struct sockaddr *sa)

{

	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);

		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);

		ret = vendor_mac_passthru_addr_read(tp, sa);

		if (ret < 0)

			ret = pla_ocp_read(tp, PLA_BACKUP, 8, sa.sa_data);

			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)) {

	} else if (!is_valid_ether_addr(sa->sa_data)) {

		netif_err(tp, probe, dev, "Invalid ether addr %pM\n",

			  sa.sa_data);

			  sa->sa_data);

		eth_hw_addr_random(dev);

		ether_addr_copy(sa.sa_data, dev->dev_addr);

		ret = rtl8152_set_mac_address(dev, &sa);

		ether_addr_copy(sa->sa_data, dev->dev_addr);

		netif_info(tp, probe, dev, "Random ether addr %pM\n",

			   sa.sa_data);

	} else {

			   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;



	ret = determine_ethernet_addr(tp, &sa);

	if (ret < 0)

		return ret;



	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;

}
@@ -4264,10 +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;

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