openwrt-owl/target/linux/lantiq/patches-3.18/0035-owrt-lantiq-wifi-and-ethernet-eeprom-handling.patch

From f8c5db89e793a4bc6c1e87bd7b3a5cec16b75bc3 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 10 Sep 2014 22:42:14 +0200
Subject: [PATCH 35/36] owrt: lantiq: wifi and ethernet eeprom handling

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/include/asm/mach-lantiq/pci-ath-fixup.h  |    6 +
 .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h |    3 +
 arch/mips/lantiq/xway/Makefile                     |    3 +
 arch/mips/lantiq/xway/ath_eep.c                    |  282 ++++++++++++++++++++
 arch/mips/lantiq/xway/eth_mac.c                    |   76 ++++++
 arch/mips/lantiq/xway/pci-ath-fixup.c              |  109 ++++++++
 arch/mips/lantiq/xway/rt_eep.c                     |   60 +++++
 7 files changed, 539 insertions(+)
 create mode 100644 arch/mips/include/asm/mach-lantiq/pci-ath-fixup.h
 create mode 100644 arch/mips/lantiq/xway/ath_eep.c
 create mode 100644 arch/mips/lantiq/xway/eth_mac.c
 create mode 100644 arch/mips/lantiq/xway/pci-ath-fixup.c
 create mode 100644 arch/mips/lantiq/xway/rt_eep.c

--- /dev/null
+++ b/arch/mips/include/asm/mach-lantiq/pci-ath-fixup.h
@@ -0,0 +1,6 @@
+#ifndef _PCI_ATH_FIXUP
+#define _PCI_ATH_FIXUP
+
+void ltq_pci_ath_fixup(unsigned slot, u16 *cal_data) __init;
+
+#endif /* _PCI_ATH_FIXUP */
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -90,5 +90,8 @@
 extern void ltq_pmu_enable(unsigned int module);
 extern void ltq_pmu_disable(unsigned int module);
 
+/* allow the ethernet driver to load a flash mapped mac addr */
+const u8* ltq_get_eth_mac(void);
+
 #endif /* CONFIG_SOC_TYPE_XWAY */
 #endif /* _LTQ_XWAY_H__ */
--- a/arch/mips/lantiq/xway/Makefile
+++ b/arch/mips/lantiq/xway/Makefile
@@ -2,4 +2,7 @@
 
 obj-y += vmmc.o tffs.o
 
+obj-y += eth_mac.o
+obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
+
 obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
--- /dev/null
+++ b/arch/mips/lantiq/xway/ath_eep.c
@@ -0,0 +1,282 @@
+/*
+ *  Copyright (C) 2011 Luca Olivetti <luca@ventoso.org>
+ *  Copyright (C) 2011 John Crispin <blogic@openwrt.org>
+ *  Copyright (C) 2011 Andrej Vlašić <andrej.vlasic0@gmail.com>
+ *  Copyright (C) 2013 Álvaro Fernández Rojas <noltari@gmail.com>
+ *  Copyright (C) 2013 Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/etherdevice.h>
+#include <linux/ath5k_platform.h>
+#include <linux/ath9k_platform.h>
+#include <linux/pci.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <pci-ath-fixup.h>
+#include <lantiq_soc.h>
+
+extern int (*ltq_pci_plat_dev_init)(struct pci_dev *dev);
+struct ath5k_platform_data ath5k_pdata;
+struct ath9k_platform_data ath9k_pdata = {
+	.led_pin = -1,
+};
+static u8 athxk_eeprom_mac[6];
+
+static int ath9k_pci_plat_dev_init(struct pci_dev *dev)
+{
+	dev->dev.platform_data = &ath9k_pdata;
+	return 0;
+}
+
+static int ath9k_eep_load;
+int __init of_ath9k_eeprom_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node, *mtd_np;
+	struct resource *eep_res, *mac_res = NULL;
+	void __iomem *eep, *mac;
+	int mac_offset, led_pin;
+	u32 mac_inc = 0, pci_slot = 0;
+	int i;
+	struct mtd_info *the_mtd;
+	size_t flash_readlen;
+	const __be32 *list;
+	const char *part;
+	phandle phandle;
+
+	if ((list = of_get_property(np, "ath,eep-flash", &i)) && i == 2 *
+			sizeof(*list) && (phandle = be32_to_cpup(list++)) &&
+			(mtd_np = of_find_node_by_phandle(phandle)) && ((part =
+			of_get_property(mtd_np, "label", NULL)) || (part =
+			mtd_np->name)) && (the_mtd = get_mtd_device_nm(part))
+			!= ERR_PTR(-ENODEV)) {
+		i = mtd_read(the_mtd, be32_to_cpup(list),
+				ATH9K_PLAT_EEP_MAX_WORDS << 1, &flash_readlen,
+				(void *) ath9k_pdata.eeprom_data);
+		if (!of_property_read_u32(np, "ath,mac-offset", &mac_offset)) {
+			size_t mac_readlen;
+			mtd_read(the_mtd, mac_offset, 6, &mac_readlen,
+				(void *) athxk_eeprom_mac);
+		}
+		put_mtd_device(the_mtd);
+		if ((sizeof(ath9k_pdata.eeprom_data) != flash_readlen) || i) {
+			dev_err(&pdev->dev, "failed to load eeprom from mtd\n");
+			return -ENODEV;
+		}
+	} else {
+		eep_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		mac_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+
+		if (!eep_res) {
+			dev_err(&pdev->dev, "failed to load eeprom address\n");
+			return -ENODEV;
+		}
+		if (resource_size(eep_res) != ATH9K_PLAT_EEP_MAX_WORDS << 1) {
+			dev_err(&pdev->dev, "eeprom has an invalid size\n");
+			return -EINVAL;
+		}
+
+		eep = ioremap(eep_res->start, resource_size(eep_res));
+		memcpy_fromio(ath9k_pdata.eeprom_data, eep,
+				ATH9K_PLAT_EEP_MAX_WORDS << 1);
+	}
+
+	if (of_find_property(np, "ath,eep-swap", NULL))
+		for (i = 0; i < ATH9K_PLAT_EEP_MAX_WORDS; i++)
+			ath9k_pdata.eeprom_data[i] = swab16(ath9k_pdata.eeprom_data[i]);
+
+	if (of_find_property(np, "ath,eep-endian", NULL)) {
+		ath9k_pdata.endian_check = true;
+
+		dev_info(&pdev->dev, "endian check enabled.\n");
+	}
+
+	if (!is_valid_ether_addr(athxk_eeprom_mac)) {
+		if (mac_res) {
+			if (resource_size(mac_res) != 6) {
+				dev_err(&pdev->dev, "mac has an invalid size\n");
+				return -EINVAL;
+			}
+			mac = ioremap(mac_res->start, resource_size(mac_res));
+			memcpy_fromio(athxk_eeprom_mac, mac, 6);
+		} else if (ltq_get_eth_mac()) {
+			memcpy(athxk_eeprom_mac, ltq_get_eth_mac(), 6);
+		}
+	}
+	if (!is_valid_ether_addr(athxk_eeprom_mac)) {
+		dev_warn(&pdev->dev, "using random mac\n");
+		random_ether_addr(athxk_eeprom_mac);
+	}
+
+	if (!of_property_read_u32(np, "ath,mac-increment", &mac_inc))
+		athxk_eeprom_mac[5] += mac_inc;
+
+	ath9k_pdata.macaddr = athxk_eeprom_mac;
+	ltq_pci_plat_dev_init = ath9k_pci_plat_dev_init;
+
+	if (!of_property_read_u32(np, "ath,pci-slot", &pci_slot)) {
+		ltq_pci_ath_fixup(pci_slot, ath9k_pdata.eeprom_data);
+
+		dev_info(&pdev->dev, "pci slot: %u\n", pci_slot);
+                if (ath9k_eep_load) {
+                        struct pci_dev *d = NULL;
+                        while ((d = pci_get_device(PCI_VENDOR_ID_ATHEROS,
+                                        PCI_ANY_ID, d)) != NULL)
+                                pci_fixup_device(pci_fixup_early, d);
+                }
+
+	}
+
+	if (!of_property_read_u32(np, "ath,led-pin", &led_pin)) {
+		ath9k_pdata.led_pin = led_pin;
+		dev_info(&pdev->dev, "using led pin %d.\n", led_pin);
+	}
+
+	dev_info(&pdev->dev, "loaded ath9k eeprom\n");
+
+	return 0;
+}
+
+static struct of_device_id ath9k_eeprom_ids[] = {
+	{ .compatible = "ath9k,eeprom" },
+	{ }
+};
+
+static struct platform_driver ath9k_eeprom_driver = {
+	.driver		= {
+		.name		= "ath9k,eeprom",
+		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(ath9k_eeprom_ids),
+	},
+};
+
+static int __init of_ath9k_eeprom_init(void)
+{
+        int ret = platform_driver_probe(&ath9k_eeprom_driver, of_ath9k_eeprom_probe);
+
+        if (ret)
+                ath9k_eep_load = 1;
+
+        return ret;
+}
+
+static int __init of_ath9k_eeprom_init_late(void)
+{
+        if (!ath9k_eep_load)
+                return 0;
+        return platform_driver_probe(&ath9k_eeprom_driver, of_ath9k_eeprom_probe);
+}
+late_initcall(of_ath9k_eeprom_init_late);
+subsys_initcall(of_ath9k_eeprom_init);
+
+
+static int ath5k_pci_plat_dev_init(struct pci_dev *dev)
+{
+	dev->dev.platform_data = &ath5k_pdata;
+	return 0;
+}
+
+int __init of_ath5k_eeprom_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node, *mtd_np;
+	struct resource *eep_res, *mac_res = NULL;
+	void __iomem *eep, *mac;
+	int mac_offset;
+	u32 mac_inc = 0;
+	int i;
+	struct mtd_info *the_mtd;
+	size_t flash_readlen;
+	const __be32 *list;
+	const char *part;
+	phandle phandle;
+
+	if ((list = of_get_property(np, "ath,eep-flash", &i)) && i == 2 *
+			sizeof(*list) && (phandle = be32_to_cpup(list++)) &&
+			(mtd_np = of_find_node_by_phandle(phandle)) && ((part =
+			of_get_property(mtd_np, "label", NULL)) || (part =
+			mtd_np->name)) && (the_mtd = get_mtd_device_nm(part))
+			!= ERR_PTR(-ENODEV)) {
+		i = mtd_read(the_mtd, be32_to_cpup(list),
+				ATH5K_PLAT_EEP_MAX_WORDS << 1, &flash_readlen,
+				(void *) ath5k_pdata.eeprom_data);
+		put_mtd_device(the_mtd);
+		if ((sizeof(ATH5K_PLAT_EEP_MAX_WORDS << 1) != flash_readlen)
+				|| i) {
+			dev_err(&pdev->dev, "failed to load eeprom from mtd\n");
+			return -ENODEV;
+		}
+	} else {
+		eep_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		mac_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+
+		if (!eep_res) {
+			dev_err(&pdev->dev, "failed to load eeprom address\n");
+			return -ENODEV;
+		}
+		if (resource_size(eep_res) != ATH5K_PLAT_EEP_MAX_WORDS << 1) {
+			dev_err(&pdev->dev, "eeprom has an invalid size\n");
+			return -EINVAL;
+		}
+
+		eep = ioremap(eep_res->start, resource_size(eep_res));
+		ath5k_pdata.eeprom_data = kmalloc(ATH5K_PLAT_EEP_MAX_WORDS<<1,
+				GFP_KERNEL);
+		memcpy_fromio(ath5k_pdata.eeprom_data, eep,
+				ATH5K_PLAT_EEP_MAX_WORDS << 1);
+	}
+
+	if (of_find_property(np, "ath,eep-swap", NULL))
+		for (i = 0; i < ATH5K_PLAT_EEP_MAX_WORDS; i++)
+			ath5k_pdata.eeprom_data[i] = swab16(ath5k_pdata.eeprom_data[i]);
+
+	if (!of_property_read_u32(np, "ath,mac-offset", &mac_offset)) {
+		memcpy_fromio(athxk_eeprom_mac, (void*) ath5k_pdata.eeprom_data + mac_offset, 6);
+	} else if (mac_res) {
+		if (resource_size(mac_res) != 6) {
+			dev_err(&pdev->dev, "mac has an invalid size\n");
+			return -EINVAL;
+		}
+		mac = ioremap(mac_res->start, resource_size(mac_res));
+		memcpy_fromio(athxk_eeprom_mac, mac, 6);
+	} else if (ltq_get_eth_mac())
+		memcpy(athxk_eeprom_mac, ltq_get_eth_mac(), 6);
+	else {
+		dev_warn(&pdev->dev, "using random mac\n");
+		random_ether_addr(athxk_eeprom_mac);
+	}
+
+	if (!of_property_read_u32(np, "ath,mac-increment", &mac_inc))
+		athxk_eeprom_mac[5] += mac_inc;
+
+	ath5k_pdata.macaddr = athxk_eeprom_mac;
+	ltq_pci_plat_dev_init = ath5k_pci_plat_dev_init;
+
+	dev_info(&pdev->dev, "loaded ath5k eeprom\n");
+
+	return 0;
+}
+
+static struct of_device_id ath5k_eeprom_ids[] = {
+	{ .compatible = "ath5k,eeprom" },
+	{ }
+};
+
+static struct platform_driver ath5k_eeprom_driver = {
+	.driver		= {
+		.name		= "ath5k,eeprom",
+		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(ath5k_eeprom_ids),
+	},
+};
+
+static int __init of_ath5k_eeprom_init(void)
+{
+	return platform_driver_probe(&ath5k_eeprom_driver, of_ath5k_eeprom_probe);
+}
+device_initcall(of_ath5k_eeprom_init);
--- /dev/null
+++ b/arch/mips/lantiq/xway/eth_mac.c
@@ -0,0 +1,76 @@
+/*
+ *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/if_ether.h>
+
+static u8 eth_mac[6];
+static int eth_mac_set;
+
+const u8* ltq_get_eth_mac(void)
+{
+	return eth_mac;
+}
+
+static int __init setup_ethaddr(char *str)
+{
+	eth_mac_set = mac_pton(str, eth_mac);
+	return !eth_mac_set;
+}
+__setup("ethaddr=", setup_ethaddr);
+
+int __init of_eth_mac_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *mac_res;
+	void __iomem *mac;
+	u32 mac_inc = 0;
+
+	if (eth_mac_set) {
+		dev_err(&pdev->dev, "mac was already set by bootloader\n");
+		return -EINVAL;
+	}
+	mac_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	if (!mac_res) {
+		dev_err(&pdev->dev, "failed to load mac\n");
+		return -EINVAL;
+	}
+	if (resource_size(mac_res) != 6) {
+		dev_err(&pdev->dev, "mac has an invalid size\n");
+		return -EINVAL;
+	}
+	mac = ioremap(mac_res->start, resource_size(mac_res));
+	memcpy_fromio(eth_mac, mac, 6);
+
+	if (!of_property_read_u32(np, "mac-increment", &mac_inc))
+		eth_mac[5] += mac_inc;
+
+	return 0;
+}
+
+static struct of_device_id eth_mac_ids[] = {
+	{ .compatible = "lantiq,eth-mac" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver eth_mac_driver = {
+	.driver		= {
+		.name		= "lantiq,eth-mac",
+		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(eth_mac_ids),
+	},
+};
+
+static int __init of_eth_mac_init(void)
+{
+	return platform_driver_probe(&eth_mac_driver, of_eth_mac_probe);
+}
+device_initcall(of_eth_mac_init);
--- /dev/null
+++ b/arch/mips/lantiq/xway/pci-ath-fixup.c
@@ -0,0 +1,109 @@
+/*
+ *  Atheros AP94 reference board PCI initialization
+ *
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <lantiq_soc.h>
+
+#define LTQ_PCI_MEM_BASE		0x18000000
+
+struct ath_fixup {
+	u16		*cal_data;
+	unsigned	slot;
+};
+
+static int ath_num_fixups;
+static struct ath_fixup ath_fixups[2];
+
+static void ath_pci_fixup(struct pci_dev *dev)
+{
+	void __iomem *mem;
+	u16 *cal_data = NULL;
+	u16 cmd;
+	u32 bar0;
+	u32 val;
+	unsigned i;
+
+	for (i = 0; i < ath_num_fixups; i++) {
+		if (ath_fixups[i].cal_data == NULL)
+			continue;
+
+		if (ath_fixups[i].slot != PCI_SLOT(dev->devfn))
+			continue;
+
+		cal_data = ath_fixups[i].cal_data;
+		break;
+	}
+
+	if (cal_data == NULL)
+		return;
+
+	if (*cal_data != 0xa55a) {
+		pr_err("pci %s: invalid calibration data\n", pci_name(dev));
+		return;
+	}
+
+	pr_info("pci %s: fixup device configuration\n", pci_name(dev));
+
+	mem = ioremap(LTQ_PCI_MEM_BASE, 0x10000);
+	if (!mem) {
+		pr_err("pci %s: ioremap error\n", pci_name(dev));
+		return;
+	}
+
+	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, LTQ_PCI_MEM_BASE);
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	/* set pointer to first reg address */
+	cal_data += 3;
+	while (*cal_data != 0xffff) {
+		u32 reg;
+		reg = *cal_data++;
+		val = *cal_data++;
+		val |= (*cal_data++) << 16;
+
+		ltq_w32(swab32(val), mem + reg);
+		udelay(100);
+	}
+
+	pci_read_config_dword(dev, PCI_VENDOR_ID, &val);
+	dev->vendor = val & 0xffff;
+	dev->device = (val >> 16) & 0xffff;
+
+	pci_read_config_dword(dev, PCI_CLASS_REVISION, &val);
+	dev->revision = val & 0xff;
+	dev->class = val >> 8; /* upper 3 bytes */
+
+	pr_info("pci %s: fixup info: [%04x:%04x] revision %02x class %#08x\n", 
+		pci_name(dev), dev->vendor, dev->device, dev->revision, dev->class);
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
+
+	iounmap(mem);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath_pci_fixup);
+
+void __init ltq_pci_ath_fixup(unsigned slot, u16 *cal_data)
+{
+	if (ath_num_fixups >= ARRAY_SIZE(ath_fixups))
+		return;
+
+	ath_fixups[ath_num_fixups].slot = slot;
+	ath_fixups[ath_num_fixups].cal_data = cal_data;
+	ath_num_fixups++;
+}
--- /dev/null
+++ b/arch/mips/lantiq/xway/rt_eep.c
@@ -0,0 +1,60 @@
+/*
+ *  Copyright (C) 2011 John Crispin <blogic@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/rt2x00_platform.h>
+
+extern int (*ltq_pci_plat_dev_init)(struct pci_dev *dev);
+static struct rt2x00_platform_data rt2x00_pdata;
+
+static int rt2x00_pci_plat_dev_init(struct pci_dev *dev)
+{
+	dev->dev.platform_data = &rt2x00_pdata;
+	return 0;
+}
+
+int __init of_ralink_eeprom_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	const char *eeprom;
+
+	if (of_property_read_string(np, "ralink,eeprom", &eeprom)) {
+		dev_err(&pdev->dev, "failed to load eeprom filename\n");
+		return 0;
+	}
+
+	rt2x00_pdata.eeprom_file_name = kstrdup(eeprom, GFP_KERNEL);
+//	rt2x00_pdata.mac_address = mac;
+	ltq_pci_plat_dev_init = rt2x00_pci_plat_dev_init;
+
+	dev_info(&pdev->dev, "using %s as eeprom\n", eeprom);
+
+	return 0;
+}
+
+static struct of_device_id ralink_eeprom_ids[] = {
+	{ .compatible = "ralink,eeprom" },
+	{ }
+};
+
+static struct platform_driver ralink_eeprom_driver = {
+	.driver		= {
+		.name		= "ralink,eeprom",
+		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(ralink_eeprom_ids),
+	},
+};
+
+static int __init of_ralink_eeprom_init(void)
+{
+	return platform_driver_probe(&ralink_eeprom_driver, of_ralink_eeprom_probe);
+}
+device_initcall(of_ralink_eeprom_init);
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -161,7 +161,7 @@
 	int tx_irq;
 	int rx_irq;
 
-	const void *mac;
+	void *mac;
 	int mii_mode;
 
 	spinlock_t lock;
@@ -840,7 +840,11 @@
 	if (err)
 		goto err_hw;
 
-	memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
+	if (priv->mac)
+		memcpy(&mac.sa_data, priv->mac, ETH_ALEN);
+	else
+		memcpy(&mac.sa_data, ltq_get_eth_mac(), ETH_ALEN);
+
 	if (!is_valid_ether_addr(mac.sa_data)) {
 		pr_warn("etop: invalid MAC, using random\n");
 		eth_random_addr(mac.sa_data);