1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/macintosh/macio_sysfs.c b/drivers/macintosh/macio_sysfs.c
index 112e5ef728f1..9e9453b58425 100644
--- a/drivers/macintosh/macio_sysfs.c
+++ b/drivers/macintosh/macio_sysfs.c
@@ -44,7 +44,7 @@ static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
         struct of_device *ofdev = to_of_device(dev);
         int len;
 
-        len = of_device_get_modalias(ofdev, buf, PAGE_SIZE);
+        len = of_device_get_modalias(ofdev, buf, PAGE_SIZE - 2);
 
         buf[len] = '\n';
         buf[len+1] = 0;
@@ -52,6 +52,15 @@ static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
         return len+1;
 }
 
+static ssize_t devspec_show(struct device *dev,
+                                struct device_attribute *attr, char *buf)
+{
+        struct of_device *ofdev;
+
+        ofdev = to_of_device(dev);
+        return sprintf(buf, "%s\n", ofdev->node->full_name);
+}
+
 macio_config_of_attr (name, "%s\n");
 macio_config_of_attr (type, "%s\n");
 
@@ -60,5 +69,6 @@ struct device_attribute macio_dev_attrs[] = {
         __ATTR_RO(type),
         __ATTR_RO(compatible),
         __ATTR_RO(modalias),
+        __ATTR_RO(devspec),
         __ATTR_NULL
 };