diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/sys.c | 110 |
1 files changed, 85 insertions, 25 deletions
diff --git a/drivers/base/sys.c b/drivers/base/sys.c index 214b9643540..3431eb6004c 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; |