Messages in this thread Patch in this message | | | From | Greg KH <> | Subject | [PATCH 14/16] Driver core: Don't ignore error returns from probing | Date | Wed, 18 Oct 2006 13:09:05 -0700 |
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From: Alan Stern <stern@rowland.harvard.edu>
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> --- drivers/base/bus.c | 6 ++++-- 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 d516f7d..d7c5ea2 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -439,8 +439,10 @@ void bus_remove_device(struct device * d 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 41f3dca..68ad11a 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: -- 1.4.2.4 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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