aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/base/bus.c8
-rw-r--r--drivers/base/dd.c2
-rw-r--r--include/linux/device.h3
3 files changed, 10 insertions, 3 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index aa685a20b64..636af538a2b 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -392,6 +392,7 @@ out:
* bus_attach_device - add device to bus
* @dev: device tried to attach to a driver
*
+ * - Add device to bus's list of devices.
* - Try to attach to driver.
*/
int bus_attach_device(struct device * dev)
@@ -400,11 +401,13 @@ int bus_attach_device(struct device * dev)
int ret = 0;
if (bus) {
+ dev->is_registered = 1;
ret = device_attach(dev);
if (ret >= 0) {
klist_add_tail(&dev->knode_bus, &bus->klist_devices);
ret = 0;
- }
+ } else
+ dev->is_registered = 0;
}
return ret;
}
@@ -425,7 +428,8 @@ void bus_remove_device(struct device * dev)
sysfs_remove_link(&dev->kobj, "bus");
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);
- klist_remove(&dev->knode_bus);
+ dev->is_registered = 0;
+ klist_del(&dev->knode_bus);
pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
device_release_driver(dev);
put_bus(dev->bus);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 319a73be418..b5f43c3e44f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -162,6 +162,8 @@ int driver_probe_device(struct device_driver * drv, struct device * dev)
struct task_struct *probe_task;
int ret = 0;
+ if (!device_is_registered(dev))
+ return -ENODEV;
if (drv->bus->match && !drv->bus->match(dev, drv))
goto done;
diff --git a/include/linux/device.h b/include/linux/device.h
index 74246efba93..662e6a10144 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -329,6 +329,7 @@ struct device {
struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */
+ unsigned is_registered:1;
struct device_attribute uevent_attr;
struct device_attribute *devt_attr;
@@ -381,7 +382,7 @@ dev_set_drvdata (struct device *dev, void *data)
static inline int device_is_registered(struct device *dev)
{
- return klist_node_attached(&dev->knode_bus);
+ return dev->is_registered;
}
/*