[PATCH] (1/12) Probe2 infrastructure for 2.6 experimental

New infrastructure to allow probing older builtin drivers (like ISA)
Originally by Al Viro, updated to apply agains jgarzik/net-drivers-2.5-exp

drivers/net/Space.c

@@ -110,6 +110,11 @@ struct devprobe
 	int status;	/* non-zero if autoprobe has failed */
 };
 
+struct devprobe2 {
+	struct net_device *(*probe)(int unit);
+	int status;	/* non-zero if autoprobe has failed */
+};
+
 /*
  * probe_list walks a list of probe functions and calls each so long
  * as a non-zero ioaddr is given, or as long as it hasn't already failed 
@@ -135,6 +140,21 @@ static int __init probe_list(struct net_device *dev, struct devprobe *plist)
 	return -ENODEV;
 }
 
+static int __init probe_list2(int unit, struct devprobe2 *p, int autoprobe)
+{
+	struct net_device *dev;
+	for (; p->probe; p++) {
+		if (autoprobe && p->status)
+			continue;
+		dev = p->probe(unit);
+		if (!IS_ERR(dev))
+			return 0;
+		if (autoprobe)
+			p->status = PTR_ERR(dev);
+	}
+	return -ENODEV;
+}
+
 /*
  * This is a bit of an artificial separation as there are PCI drivers
  * that also probe for EISA cards (in the PCI group) and there are ISA
@@ -372,6 +392,16 @@ static int __init ethif_probe(int unit)
 	return err;
 
 }
+ 
+static void __init ethif_probe2(int unit)
+{
+	unsigned long base_addr = netdev_boot_base("eth", unit);
+
+	if (base_addr == 1)
+		return;
+
+	return;	/* nothing yet */
+}
 
 #ifdef CONFIG_TR
 /* Token-ring device probe */
@@ -440,7 +470,8 @@ static int __init net_olddevs_init(void)
 		trif_probe(num);
 #endif
 	for (num = 0; num < 8; ++num)
-		ethif_probe(num);
+		if (!ethif_probe(num))
+			ethif_probe2(num);
 
 #ifdef CONFIG_COPS
 	cops_probe(0);

include/linux/netdevice.h

@@ -496,6 +496,7 @@ extern rwlock_t				dev_base_lock;		/* Device list lock */
 
 extern int			netdev_boot_setup_add(char *name, struct ifmap *map);
 extern int 			netdev_boot_setup_check(struct net_device *dev);
+extern unsigned long		netdev_boot_base(const char *prefix, int unit);
 extern struct net_device    *dev_getbyhwaddr(unsigned short type, char *hwaddr);
 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);

net/core/dev.c

@@ -371,6 +371,30 @@ int netdev_boot_setup_check(struct net_device *dev)
 	return 0;
 }
 
+
+/**
+ *	netdev_boot_base	- get address from boot time settings
+ *	@prefix: prefix for network device
+ *	@unit: id for network device
+ *
+ * 	Check boot time settings for the base address of device.
+ *	The found settings are set for the device to be used
+ *	later in the device probing.
+ *	Returns 0 if no settings found.
+ */
+unsigned long netdev_boot_base(const char *prefix, int unit)
+{
+	const struct netdev_boot_setup *s = dev_boot_setup;
+	char name[IFNAMSIZ];
+	int i;
+
+	sprintf(name, "%s%d", prefix, unit);
+	for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
+		if (!strcmp(name, s[i].name))
+			return s[i].map.base_addr;
+	return 0;
+}
+
 /*
  * Saves at boot time configured settings for any netdevice.
  */