xtensa: ISS: drop IP setup, clean up MAC setup

Without proper MAC setup network device doesn't work. IP setup is
redundant and may be done with 'ip=...' kernel parameter.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

1 files changed, 31 insertions, 46 deletions

diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c
index 3718cff3909a..f7709c7efca4 100644
--- a/arch/xtensa/platforms/iss/network.c
+++ b/arch/xtensa/platforms/iss/network.c
@@ -81,9 +81,6 @@ struct iss_net_private {
         int index;
         int mtu;
 
-        unsigned char mac[ETH_ALEN];
-        int have_mac;
-
         struct {
                 union {
                         struct tuntap_info tuntap;
@@ -123,44 +120,41 @@ static char *split_if_spec(char *str, ...)
         return str;
 }
 
+/* Set Ethernet address of the specified device. */
 
-/* Return the IP address as a string for a given device. */
-
-static void dev_ip_addr(void *d, char *buf, char *bin_buf)
+static void setup_etheraddr(struct net_device *dev, char *str)
 {
-        struct net_device *dev = d;
-        struct in_device *ip = dev->ip_ptr;
-        struct in_ifaddr *in;
-        __be32 addr;
-
-        if (ip == NULL || ip->ifa_list == NULL) {
-                pr_warn("Device not assigned an IP address!\n");
-                return;
-        }
+        unsigned char *addr = dev->dev_addr;
 
-        in = ip->ifa_list;
+        if (str == NULL)
+                goto random;
 
-        addr = in->ifa_address;
-        sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff,
-                (addr >> 16) & 0xff, addr >> 24);
-
-        if (bin_buf) {
-                bin_buf[0] = addr & 0xff;
-                bin_buf[1] = (addr >> 8) & 0xff;
-                bin_buf[2] = (addr >> 16) & 0xff;
-                bin_buf[3] = addr >> 24;
+        if (!mac_pton(str, addr)) {
+                pr_err("%s: failed to parse '%s' as an ethernet address\n",
+                       dev->name, str);
+                goto random;
         }
+        if (is_multicast_ether_addr(addr)) {
+                pr_err("%s: attempt to assign a multicast ethernet address\n",
+                       dev->name);
+                goto random;
+        }
+        if (!is_valid_ether_addr(addr)) {
+                pr_err("%s: attempt to assign an invalid ethernet address\n",
+                       dev->name);
+                goto random;
+        }
+        if (!is_local_ether_addr(addr))
+                pr_warn("%s: assigning a globally valid ethernet address\n",
+                        dev->name);
+        return;
+
+random:
+        pr_info("%s: choosing a random ethernet address\n",
+                dev->name);
+        eth_hw_addr_random(dev);
 }
 
-/* Set Ethernet address of the specified device. */
-
-static inline void set_ether_mac(void *d, unsigned char *addr)
-{
-        struct net_device *dev = d;
-        memcpy(dev->dev_addr, addr, ETH_ALEN);
-}
-
-
 /* ======================= TUNTAP TRANSPORT INTERFACE ====================== */
 
 static int tuntap_open(struct iss_net_private *lp)
@@ -232,6 +226,7 @@ static int tuntap_poll(struct iss_net_private *lp)
 
 static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
 {
+        struct net_device *dev = lp->dev;
         char *dev_name = NULL, *mac_str = NULL, *rem = NULL;
 
         /* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */
@@ -259,6 +254,7 @@ static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
         } else
                 strcpy(lp->tp.info.tuntap.dev_name, TRANSPORT_TUNTAP_NAME);
 
+        setup_etheraddr(dev, mac_str);
 
         lp->mtu = TRANSPORT_TUNTAP_MTU;
 
@@ -369,7 +365,6 @@ static void iss_net_timer(unsigned long priv)
 static int iss_net_open(struct net_device *dev)
 {
         struct iss_net_private *lp = netdev_priv(dev);
-        char addr[sizeof("255.255.255.255\0")];
         int err;
 
         spin_lock(&lp->lock);
@@ -378,11 +373,6 @@ static int iss_net_open(struct net_device *dev)
         if (err < 0)
                 goto out;
 
-        if (!lp->have_mac) {
-                dev_ip_addr(dev, addr, &lp->mac[2]);
-                set_ether_mac(dev, lp->mac);
-        }
-
         netif_start_queue(dev);
 
         /* clear buffer - it can happen that the host side of the interface
@@ -540,8 +530,6 @@ static int iss_net_configure(int index, char *init)
                 .lock                   = __SPIN_LOCK_UNLOCKED(lp.lock),
                 .dev                    = dev,
                 .index                  = index,
-                .mac                    = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0 },
-                .have_mac               = 0,
                 };
 
         /*
@@ -561,10 +549,7 @@ static int iss_net_configure(int index, char *init)
                 goto errout;
         }
 
-        printk(KERN_INFO "Netdevice %d ", index);
-        if (lp->have_mac)
-                printk("(%pM) ", lp->mac);
-        printk(": ");
+        pr_info("Netdevice %d (%pM)\n", index, dev->dev_addr);
 
         /* sysfs register */