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

5 files changed, 125 insertions, 36 deletions

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;