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| author | Alan Stern <stern@rowland.harvard.edu> | 2006-10-05 23:03:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-10-18 21:49:55 +0200 |
| commit | f70fa6296c2ec8f541f0a9b406ccc2d9d127d639 (patch) | |
| tree | f9fd9bbb13a62683c6b41612cfb34fa3894f8676 | |
| parent | Driver core: Don't leak 'old_class_name' in drivers/base/core.c::device_rename() (diff) | |
| download | linux-f70fa6296c2ec8f541f0a9b406ccc2d9d127d639.tar.xz linux-f70fa6296c2ec8f541f0a9b406ccc2d9d127d639.zip | |
Driver core: Don't ignore error returns from probing
This patch (as797) fixes device_add() in the driver core. It needs to
pay attention when the driver for a new device reports an error.
At the same time, since bus_remove_device() undoes the effects of both
bus_add_device() and bus_attach_device(), it needs to check whether
the bus_attach_device step failed.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/base/bus.c | 6 | ||||
| -rw-r--r-- | drivers/base/core.c | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index d516f7d5f168..d7c5ea246a0b 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -439,8 +439,10 @@ 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); - dev->is_registered = 0; - klist_del(&dev->knode_bus); + if (dev->is_registered) { + 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/core.c b/drivers/base/core.c index 41f3dca55cd0..68ad11af22b4 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -479,7 +479,8 @@ int device_add(struct device *dev) if ((error = bus_add_device(dev))) goto BusError; kobject_uevent(&dev->kobj, KOBJ_ADD); - bus_attach_device(dev); + if ((error = bus_attach_device(dev))) + goto AttachError; if (parent) klist_add_tail(&dev->knode_parent, &parent->klist_children); @@ -498,6 +499,8 @@ 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: |