Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6

10 files changed, 178 insertions, 70 deletions

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index dc276598a65a..c8bce82ddcac 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -90,7 +90,7 @@ void device_remove_file(struct device *, struct device_attribute *);
 
 It also defines this helper for defining device attributes: 
 
-#define DEVICE_ATTR(_name,_mode,_show,_store)      \
+#define DEVICE_ATTR(_name, _mode, _show, _store)      \
 struct device_attribute dev_attr_##_name = {            \
         .attr = {.name  = __stringify(_name) , .mode   = _mode },      \
         .show   = _show,                                \
@@ -99,14 +99,14 @@ struct device_attribute dev_attr_##_name = {            \
 
 For example, declaring
 
-static DEVICE_ATTR(foo,0644,show_foo,store_foo);
+static DEVICE_ATTR(foo, S_IWUSR | S_IRUGO, show_foo, store_foo);
 
 is equivalent to doing:
 
 static struct device_attribute dev_attr_foo = {
        .attr    = {
                 .name = "foo",
-                .mode = 0644,
+                .mode = S_IWUSR | S_IRUGO,
         },
         .show = show_foo,
         .store = store_foo,
@@ -121,8 +121,8 @@ set of sysfs operations for forwarding read and write calls to the
 show and store methods of the attribute owners. 
 
 struct sysfs_ops {
-        ssize_t (*show)(struct kobject *, struct attribute *,char *);
-        ssize_t (*store)(struct kobject *,struct attribute *,const char *);
+        ssize_t (*show)(struct kobject *, struct attribute *, char *);
+        ssize_t (*store)(struct kobject *, struct attribute *, const char *);
 };
 
 [ Subsystems should have already defined a struct kobj_type as a
@@ -137,7 +137,7 @@ calls the associated methods.
 
 To illustrate:
 
-#define to_dev_attr(_attr) container_of(_attr,struct device_attribute,attr)
+#define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
 #define to_dev(d) container_of(d, struct device, kobj)
 
 static ssize_t
@@ -148,7 +148,7 @@ dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
         ssize_t ret = 0;
 
         if (dev_attr->show)
-                ret = dev_attr->show(dev,buf);
+                ret = dev_attr->show(dev, buf);
         return ret;
 }
 
@@ -216,16 +216,16 @@ A very simple (and naive) implementation of a device attribute is:
 
 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
 {
-        return sprintf(buf,"%s\n",dev->name);
+        return snprintf(buf, PAGE_SIZE, "%s\n", dev->name);
 }
 
 static ssize_t store_name(struct device * dev, const char * buf)
 {
-        sscanf(buf,"%20s",dev->name);
-        return strlen(buf);
+        sscanf(buf, "%20s", dev->name);
+        return strnlen(buf, PAGE_SIZE);
 }
 
-static DEVICE_ATTR(name,S_IRUGO,show_name,store_name);
+static DEVICE_ATTR(name, S_IRUGO, show_name, store_name);
 
 
 (Note that the real implementation doesn't allow userspace to set the 
@@ -290,7 +290,7 @@ struct device_attribute {
 
 Declaring:
 
-DEVICE_ATTR(_name,_str,_mode,_show,_store);
+DEVICE_ATTR(_name, _str, _mode, _show, _store);
 
 Creation/Removal:
 
@@ -310,7 +310,7 @@ struct bus_attribute {
 
 Declaring:
 
-BUS_ATTR(_name,_mode,_show,_store)
+BUS_ATTR(_name, _mode, _show, _store)
 
 Creation/Removal:
 
@@ -331,7 +331,7 @@ struct driver_attribute {
 
 Declaring:
 
-DRIVER_ATTR(_name,_mode,_show,_store)
+DRIVER_ATTR(_name, _mode, _show, _store)
 
 Creation/Removal:
 
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index ab53832d57e5..17e96698410e 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -156,7 +156,9 @@ static ssize_t driver_unbind(struct device_driver *drv,
                 device_release_driver(dev);
                 err = count;
         }
-        return err;
+        if (err)
+                return err;
+        return count;
 }
 static DRIVER_ATTR(unbind, S_IWUSR, NULL, driver_unbind);
 
@@ -358,7 +360,7 @@ int bus_add_device(struct device * dev)
         if (bus) {
                 pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
                 device_attach(dev);
-                klist_add_tail(&bus->klist_devices, &dev->knode_bus);
+                klist_add_tail(&dev->knode_bus, &bus->klist_devices);
                 error = device_add_attrs(bus, dev);
                 if (!error) {
                         sysfs_create_link(&bus->devices.kobj, &dev->kobj, dev->bus_id);
@@ -446,7 +448,7 @@ int bus_add_driver(struct device_driver * drv)
                 }
 
                 driver_attach(drv);
-                klist_add_tail(&bus->klist_drivers, &drv->knode_bus);
+                klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
                 module_add_driver(drv->owner, drv);
 
                 driver_add_attrs(bus, drv);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 0154a1623b21..d164c32a97ad 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -299,10 +299,8 @@ static void class_dev_release(struct kobject * kobj)
 
         pr_debug("device class '%s': release.\n", cd->class_id);
 
-        if (cd->devt_attr) {
-                kfree(cd->devt_attr);
-                cd->devt_attr = NULL;
+        kfree(cd->devt_attr);
+        cd->devt_attr = NULL;