diff options
| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2007-02-05 16:15:26 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 10:57:29 -0700 |
| commit | c6a46696f97ff260a4ecce5e287f8de4b9d7fe14 (patch) | |
| tree | 335de50c9868cd575f535677e430677d33cbaaa1 | |
| parent | eed40d3ad2ba652c08422d62a5ff6f62ac0be16d (diff) | |
driver core: don't fail attaching the device if it cannot be bound
Don't fail bus_attach_device() if the device cannot be bound.
If dev->driver has been specified, reset it to NULL if device_bind_driver()
failed and add the device as an unbound device. As a result,
bus_attach_device() now cannot fail, and we can remove some checking from
device_add().
Also remove an unneeded check in bus_rescan_devices_helper().
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/base/base.h | 2 | ||||
| -rw-r--r-- | drivers/base/bus.c | 11 | ||||
| -rw-r--r-- | drivers/base/core.c | 5 | ||||
| -rw-r--r-- | drivers/base/dd.c | 6 |
4 files changed, 11 insertions, 13 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index de7e1442ce6..d597f2659b2 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -16,7 +16,7 @@ extern int cpu_dev_init(void); extern int attribute_container_init(void); extern int bus_add_device(struct device * dev); -extern int bus_attach_device(struct device * dev); +extern void bus_attach_device(struct device * dev); extern void bus_remove_device(struct device * dev); extern struct bus_type *get_bus(struct bus_type * bus); extern void put_bus(struct bus_type * bus); diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 9df2e6dff51..20b6dc8706f 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -447,7 +447,7 @@ out_put: * - Add device to bus's list of devices. * - Try to attach to driver. */ -int bus_attach_device(struct device * dev) +void bus_attach_device(struct device * dev) { struct bus_type *bus = dev->bus; int ret = 0; @@ -456,13 +456,12 @@ int bus_attach_device(struct device * dev) dev->is_registered = 1; if (bus->drivers_autoprobe) ret = device_attach(dev); - if (ret >= 0) { + WARN_ON(ret < 0); + if (ret >= 0) klist_add_tail(&dev->knode_bus, &bus->klist_devices); - ret = 0; - } else + else dev->is_registered = 0; } - return ret; } /** @@ -669,8 +668,6 @@ static int __must_check bus_rescan_devices_helper(struct device *dev, ret = device_attach(dev); if (dev->parent) up(&dev->parent->sem); - if (ret > 0) - ret = 0; } return ret < 0 ? ret : 0; } diff --git a/drivers/base/core.c b/drivers/base/core.c index bffb69e4bde..be6aeb43079 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -677,8 +677,7 @@ int device_add(struct device *dev) goto BusError; if (!dev->uevent_suppress) kobject_uevent(&dev->kobj, KOBJ_ADD); - if ((error = bus_attach_device(dev))) - goto AttachError; + bus_attach_device(dev); if (parent) klist_add_tail(&dev->knode_parent, &parent->klist_children); @@ -697,8 +696,6 @@ int device_add(struct device *dev) kfree(class_name); put_device(dev); return error; - AttachError: - bus_remove_device(dev); BusError: device_pm_remove(dev); PMError: diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 616b4bbacf1..18dba8e78da 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -232,7 +232,7 @@ static int device_probe_drivers(void *data) * * Returns 1 if the device was bound to a driver; * 0 if no matching device was found or multithreaded probing is done; - * error code otherwise. + * -ENODEV if the device is not registered. * * When called for a USB interface, @dev->parent->sem must be held. */ @@ -246,6 +246,10 @@ int device_attach(struct device * dev) ret = device_bind_driver(dev); if (ret == 0) ret = 1; + else { + dev->driver = NULL; + ret = 0; + } } else { if (dev->bus->multithread_probe) probe_task = kthread_run(device_probe_drivers, dev, |