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;
 
         if (cls->release)
                 cls->release(cd);
@@ -452,10 +450,29 @@ void class_device_initialize(struct class_device *class_dev)
         INIT_LIST_HEAD(&class_dev->node);
 }
 
+static char *make_class_name(struct class_device *class_dev)
+{
+        char *name;
+        int size;
+
+        size = strlen(class_dev->class->name) +
+                strlen(kobject_name(&class_dev->kobj)) + 2;
+
+        name = kmalloc(size, GFP_KERNEL);
+        if (!name)
+                return ERR_PTR(-ENOMEM);
+
+        strcpy(name, class_dev->class->name);
+        strcat(name, ":");
+        strcat(name, kobject_name(&class_dev->kobj));
+        return name;
+}
+
 int class_device_add(struct class_device *class_dev)
 {
         struct class * parent = NULL;
         struct class_interface * class_intf;
+        char *class_name = NULL;
         int error;
 
         class_dev = class_device_get(class_dev);
@@ -500,9 +517,13 @@ int class_device_add(struct class_device *class_dev)
         }
 
         class_device_add_attrs(class_dev);
-        if (class_dev->dev)
+        if (class_dev->dev) {
+                class_name = make_class_name(class_dev);
                 sysfs_create_link(&class_dev->kobj,
                                   &class_dev->dev->kobj, "device");
+                sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,
+                                  class_name);
+        }
 
         /* notify any interfaces this device is now here */
         if (parent) {
@@ -519,6 +540,7 @@ int class_device_add(struct class_device *class_dev)
         if (error && parent)
                 class_put(parent);
         class_device_put(class_dev);
+        kfree(class_name);
         return error;
 }
 
@@ -584,6 +606,7 @@ void class_device_del(struct class_device *class_dev)
 {
         struct class * parent = class_dev->class;
         struct class_interface * class_intf;
+        char *class_name = NULL;
 
         if (parent) {
                 down(&parent->sem);
@@ -594,8 +617,11 @@ void class_device_del(struct class_device *class_dev)
                 up(&parent->sem);
         }
 
-        if (class_dev->dev)
+        if (class_dev->dev) {
+                class_name = make_class_name(class_dev);
                 sysfs_remove_link(&class_dev->kobj, "device");
+                sysfs_remove_link(&class_dev->dev->kobj, class_name);
+        }
         if (class_dev->devt_attr)
                 class_device_remove_file(class_dev, class_dev->devt_attr);
         class_device_remove_attrs(class_dev);
@@ -605,6 +631,7 @@ void class_device_del(struct class_device *class_dev)
 
         if (parent)
                 class_put(parent);
+        kfree(class_name);
 }
 
 void class_device_unregister(struct class_device *class_dev)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index efe03a024a5b..c8a33df00761 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -249,7 +249,7 @@ int device_add(struct device *dev)
         if ((error = bus_add_device(dev)))
                 goto BusError;
         if (parent)
-                klist_add_tail(&parent->klist_children, &dev->knode_parent);
+                klist_add_tail(&dev->knode_parent, &parent->klist_children);
 
         /* notify platform of device entry */
         if (platform_notify)
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 16323f9cbff0..d5bbce38282f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -42,7 +42,7 @@ void device_bind_driver(struct device * dev)
 {
         pr_debug("bound device '%s' to driver '%s'\n",
                  dev->bus_id, dev->driver->name);
-        klist_add_tail(&dev->driver->klist_devices, &dev->knode_driver);
+        klist_add_tail(&dev->knode_driver, &dev->driver->klist_devices);
         sysfs_create_link(&dev->driver->kobj, &dev->kobj,
                           kobject_name(&dev->kobj));
         sysfs_create_link(&dev->kobj, &dev->driver->kobj, "driver");
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 214b96435409..3431eb6004c3 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -288,6 +288,27 @@ void sysdev_shutdown(void)
         up(&sysdev_drivers_lock);
 }
 
+static void __sysdev_resume(struct sys_device *dev)
+{
+        struct sysdev_class *cls = dev->cls;
+        struct sysdev_driver *drv;
+
+        /* First, call the class-specific one */
+        if (cls->resume)
+                cls->resume(dev);
+
+        /* Call auxillary drivers next. */
+        list_for_each_entry(drv, &cls->drivers, entry) {
+                if (drv->resume)
+                        drv->resume(dev);
+        }
+
+        /* Call global drivers. */
+        list_for_each_entry(drv, &sysdev_drivers, entry) {
+                if (drv->resume)
+                        drv->resume(dev);
+        }
+}
 
 /**
  *      sysdev_suspend - Suspend all system devices.
@@ -305,38 +326,93 @@ void sysdev_shutdown(void)
 int sysdev_suspend(pm_message_t state)
 {
         struct sysdev_class * cls;
+        struct sys_device *sysdev, *err_dev;
+        struct sysdev_driver *drv, *err_drv;
+        int ret;
 
         pr_debug("Suspending System Devices\n");
 
         list_for_each_entry_reverse(cls, &system_subsys.kset.list,
                                     kset.kobj.entry) {
-                struct sys_device * sysdev;
 
                 pr_debug("Suspending type '%s':\n",
                          kobject_name(&cls->kset.kobj));
 
                 list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
-                        struct sysdev_driver * drv;
                         pr_debug(" %s\n", kobject_name(&sysdev->kobj));
 
                         /* Call global drivers first. */
                         list_for_each_entry(drv, &sysdev_drivers, entry) {
-                                if (drv->suspend)
-                                        drv->suspend(sysdev, state);
+                                if (drv->suspend) {
+                                        ret = drv->suspend(sysdev, state);
+                                        if (ret)
+                                                goto gbl_driver;
+                                }
                         }
 
                         /* Call auxillary drivers next. */
                         list_for_each_entry(drv, &cls->drivers, entry) {
-                                if (drv->suspend)
-                                        drv->suspend(sysdev, state);
+                                if (drv->suspend) {
+                                        ret = drv->suspend(sysdev, state);
+                                        if (ret)
+                                                goto aux_driver;
+                                }
                         }
 
                         /* Now call the generic one */
-                        if (cls->suspend)
-                                cls->suspend(sysdev, state);
+                        if (cls->suspend) {
+                                ret = cls->suspend(sysdev, state);
+                                if (ret)
+                                        goto cls_driver;
+                        }
                 }
         }
         return 0;
+        /* resume current sysdev */
+cls_driver:
+        drv = NULL;
+        printk(KERN_ERR "Class suspend failed for %s\n",
+                kobject_name(&sysdev->kobj));
+
+aux_driver:
+        if (drv)
+                printk(KERN_ERR "Class driver suspend failed for %s\n",
+                                kobject_name(&sysdev->kobj));
+        list_for_each_entry(err_drv, &cls->drivers, entry) {
+                if (err_drv == drv)
+                        break;
+                if (err_drv->resume)
+                        err_drv->resume(sysdev);
+        }
+        drv = NULL;
+
+gbl_driver:
+        if (drv)
+                printk(KERN_ERR "sysdev driver suspend failed for %s\n",
+                                kobject_name(&sysdev->kobj));
+        list_for_each_entry(err_drv, &sysdev_drivers, entry) {
+                if (err_drv == drv)
+                        break;
+                if (err_drv->resume)
+                        err_drv->resume(sysdev);
+        }
+        /* resume other sysdevs in current class */
+        list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
+                if (err_dev == sysdev)
+                        break;
+                pr_debug(" %s\n", kobject_name(&err_dev->kobj));
+                __sysdev_resume(err_dev);
+        }
+
+        /* resume other classes */
+        list_for_each_entry_continue(cls, &system_subsys.kset.list,
+                                        kset.kobj.entry) {
+                list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
+                        pr_debug(" %s\n", kobject_name(&err_dev->kobj));
+                        __sysdev_resume(err_dev);
+                }
+        }
+        return ret;
 }
 
 
@@ -362,25 +438,9 @@ int sysdev_resume(void)
                          kobject_name(&cls->kset.kobj));
 
                 list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
-                        struct sysdev_driver * drv;
                         pr_debug(" %s\n", kobject_name(&sysdev->kobj));
 
-                        /* First, call the class-specific one */
-                        if (cls->resume)
-                                cls->resume(sysdev);
-
-                        /* Call auxillary drivers next. */
-                        list_for_each_entry(drv, &cls->drivers, entry) {
-                                if (drv->resume)
-                                        drv->resume(sysdev);
-                        }
-
-                        /* Call global drivers. */
-                        list_for_each_entry(drv, &sysdev_drivers, entry) {
-                                if (drv->resume)
-                                        drv->resume(sysdev);
-                        }
-
+                        __sysdev_resume(sysdev);
                 }
         }
         return 0;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index f0c1084b840f..888dad5eef34 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -493,6 +493,8 @@ static struct floppy_struct user_params[N_DRIVE];
 
 static sector_t floppy_sizes[256];
 
+static char floppy_device_name[] = "floppy";
+
 /*
  * The driver is trying to determine the correct media format
  * while probing is set. rw_interrupt() clears it after a
@@ -4191,18 +4193,24 @@ static int __init floppy_setup(char *str)
 
 static int have_no_fdc = -ENODEV;
 
+static ssize_t floppy_cmos_show(struct device *dev,
+                                struct device_attribute *attr, char *buf)
+{
+        struct platform_device *p;
+        int drive;
+
+        p = container_of(dev, struct platform_device,dev);
+        drive = p->id;
+        return sprintf(buf, "%X\n", UDP->cmos);
+}
+DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL);
+
 static void floppy_device_release(struct device *dev)
 {
         complete(&device_release);
 }
 
-static struct platform_device floppy_device = {
-        .name           = "floppy",
-        .id             = 0,
-        .dev            = {
-                        .release = floppy_device_release,
-                        }
-};
+static struct platform_device floppy_device[N_DRIVE];
 
 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
 {
@@ -4370,20 +4378,26 @@ static int __init floppy_init(void)
                 goto out_flush_work;
         }
 
-        err = platform_device_register(&floppy_device);
-        if (err)
-                goto out_flush_work;
-
         for (drive = 0; drive < N_DRIVE; drive++) {
                 if (!(allowed_drive_mask & (1 << drive)))
                         continue;
                 if (fdc_state[FDC(drive)].version == FDC_NONE)
                         continue;
+
+                floppy_device[drive].name = floppy_device_name;
+                floppy_device[drive].id = drive;
+                floppy_device[drive].dev.release = floppy_device_release;
+
+                err = platform_device_register(&floppy_device[drive]);
+                if (err)
+                        goto out_flush_work;
+
+                device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
                 /* to be cleaned up... */
                 disks[drive]->private_data = (void *)(long)drive;
                 disks[drive]->queue = floppy_queue;
                 disks[drive]->flags |= GENHD_FL_REMOVABLE;
-                disks[drive]->driverfs_dev = &floppy_device.dev;
+                disks[drive]->driverfs_dev = &floppy_device[drive].dev;
                 add_disk(disks[drive]);
         }
 
@@ -4603,10 +4617,11 @@ void cleanup_module(void)
                     fdc_state[FDC(drive)].version != FDC_NONE) {
                         del_gendisk(disks[drive]);
                         unregister_devfs_entries(drive);
+                        device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
+                        platform_device_unregister(&floppy_device[drive]);
                 }
                 put_disk(disks[drive]);
         }
-        platform_device_unregister(&floppy_device);
         devfs_remove("floppy");
 
         del_timer_sync(&fd_timeout);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 79422a3b07bc..9f44e83c6a69 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -782,7 +782,7 @@ static int usb_register_bus(struct usb_bus *bus)
                 return -E2BIG;
         }
 
-        bus->class_dev = class_device_create(usb_host_class, MKDEV(0,0), bus->controller, "usb%d", busnum);
+        bus->class_dev = class_device_create(usb_host_class, MKDEV(0,0), bus->controller, "usb_host%d", busnum);
         if (IS_ERR(bus->class_dev)) {
                 clear_bit(busnum, busmap.busmap);
                 up(&usb_bus_list_lock);
diff --git a/include/linux/klist.h b/include/linux/klist.h
index eebf5e5696ec..c4d1fae4dd89 100644
--- a/include/linux/klist.h
+++ b/include/linux/klist.h
@@ -9,6 +9,9 @@
  *      This file is rleased under the GPL v2.
  */
 
+#ifndef _LINUX_KLIST_H
+#define _LINUX_KLIST_H
+
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/kref.h>
@@ -31,8 +34,8 @@ struct klist_node {
         struct completion       n_removed;
 };
 
-extern void klist_add_tail(struct klist * k, struct klist_node * n);
-extern void klist_add_head(struct klist * k, struct klist_node * n);
+extern void klist_add_tail(struct klist_node * n, struct klist * k);
+extern void klist_add_head(struct klist_node * n, struct klist * k);
 
 extern void klist_del(struct klist_node * n);
 extern void klist_remove(struct klist_node * n);
@@ -53,3 +56,4 @@ extern void klist_iter_init_node(struct klist * k, struct klist_iter * i,
 extern void klist_iter_exit(struct klist_iter * i);
 extern struct klist_node * klist_next(struct klist_iter * i);
 
+#endif
diff --git a/lib/klist.c b/lib/klist.c
index 738ab810160a..a70c836c5c4c 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -79,11 +79,11 @@ static void klist_node_init(struct klist * k, struct klist_node * n)
 
 /**
  *      klist_add_head - Initialize a klist_node and add it to front.
- *      @k:     klist it's going on.
  *      @n:     node we're adding.
+ *      @k:     klist it's going on.
  */
 
-void klist_add_head(struct klist * k, struct klist_node * n)
+void klist_add_head(struct klist_node * n, struct klist * k)
 {
         klist_node_init(k, n);
         add_head(k, n);
@@ -94,11 +94,11 @@ EXPORT_SYMBOL_GPL(klist_add_head);
 
 /**
  *      klist_add_tail - Initialize a klist_node and add it to back.
- *      @k:     klist it's going on.
  *      @n:     node we're adding.
+ *      @k:     klist it's going on.
  */
 
-void klist_add_tail(struct klist * k, struct klist_node * n)
+void klist_add_tail(struct klist_node * n, struct klist * k)
 {
         klist_node_init(k, n);
         add_tail(k, n);