diff options
| -rw-r--r-- | drivers/base/base.h | 12 | ||||
| -rw-r--r-- | drivers/base/core.c | 9 | ||||
| -rw-r--r-- | include/linux/device.h | 3 |
3 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index ca2b0376685b..62a2cb5e1780 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -63,6 +63,18 @@ struct class_private { #define to_class(obj) \ container_of(obj, struct class_private, class_subsys.kobj) +/** + * struct device_private - structure to hold the private to the driver core portions of the device structure. + * + * @device - pointer back to the struct class that this structure is + * associated with. + * + * Nothing outside of the driver core should ever touch these fields. + */ +struct device_private { + struct device *device; +}; + /* initialisation functions */ extern int devices_init(void); extern int buses_init(void); diff --git a/drivers/base/core.c b/drivers/base/core.c index 059966b617f6..16d859910104 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -109,6 +109,7 @@ static struct sysfs_ops dev_sysfs_ops = { static void device_release(struct kobject *kobj) { struct device *dev = to_dev(kobj); + struct device_private *p = dev->p; if (dev->release) dev->release(dev); @@ -120,6 +121,7 @@ static void device_release(struct kobject *kobj) WARN(1, KERN_ERR "Device '%s' does not have a release() " "function, it is broken and must be fixed.\n", dev_name(dev)); + kfree(p); } static struct kobj_type device_ktype = { @@ -859,6 +861,13 @@ int device_add(struct device *dev) if (!dev) goto done; + dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL); + if (!dev->p) { + error = -ENOMEM; + goto done; + } + dev->p->device = dev; + /* * for statically allocated devices, which should all be converted * some day, we need to initialize the name. We prevent reading back diff --git a/include/linux/device.h b/include/linux/device.h index c56b154a0bf4..4cf063fea2a9 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -28,6 +28,7 @@ #define BUS_ID_SIZE 20 struct device; +struct device_private; struct device_driver; struct driver_private; struct class; @@ -373,6 +374,8 @@ struct device { struct klist_node knode_bus; struct device *parent; + struct device_private *p; + struct kobject kobj; unsigned uevent_suppress:1; const char *init_name; /* initial name of the device */ |