library: Handle the i2c-isa case properly even after the class_dev

removal. In recent kernels we can detect i2c-isa devices by checking
the i2c bus number: i2c-isa always uses 9191 as its bus number.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4337 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -6,6 +6,8 @@ SVN HEAD
             physical device. This change is required to survive the
             planned struct class_dev removal from future 2.6 kernels.
            Add support for the SMSC LPC47M292 fans (prefix smsc47m2)
+           Recognize i2c-isa-based devices as such even after class_dev
+	    is gone
   Man page i2cdetect.8: Scanning range can be restricted
   Module bmcsensors: Fix debugging messages
   Module i2c-ali1563: Improve the status messages (2.6 backport)

lib/sysfs.c

@@ -75,18 +75,23 @@ static int sensors_read_one_sysfs_chip(struct sysfs_device *dev)
 
 	if (sscanf(dev->name, "%d-%x", &entry.name.bus, &entry.name.addr) == 2) {
 		/* find out if legacy ISA or not */
-		snprintf(bus_path, sizeof(bus_path),
+		if (entry.name.bus == 9191)
+			entry.name.bus = SENSORS_CHIP_NAME_BUS_ISA;
+		else {
+			snprintf(bus_path, sizeof(bus_path),
 				"%s/class/i2c-adapter/i2c-%d/device/name",
 				sensors_sysfs_mount, entry.name.bus);
 
-		if ((bus_attr = sysfs_open_attribute(bus_path))) {
-			if (sysfs_read_attribute(bus_attr))
-				return -SENSORS_ERR_PARSE;
+			if ((bus_attr = sysfs_open_attribute(bus_path))) {
+				if (sysfs_read_attribute(bus_attr))
+					return -SENSORS_ERR_PARSE;
 
-			if (bus_attr->value && !strncmp(bus_attr->value, "ISA ", 4))
-				entry.name.bus = SENSORS_CHIP_NAME_BUS_ISA;
+				if (bus_attr->value
+				 && !strncmp(bus_attr->value, "ISA ", 4))
+					entry.name.bus = SENSORS_CHIP_NAME_BUS_ISA;
 
-			sysfs_close_attribute(bus_attr);
+				sysfs_close_attribute(bus_attr);
+			}
 		}
 	} else if (sscanf(dev->name, "%*[a-z0-9_].%d", &entry.name.addr) == 1) {
 		/* must be new ISA (platform driver) */