Messages in this thread Patch in this message |  | | | Date | Wed, 13 Sep 2006 18:38:58 +0200 | | From | Cornelia Huck <> | | Subject | [09/12] driver core fixes: bus_attach_device() retval check |
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From: Cornelia Huck <cornelia.huck@de.ibm.com>
Check for return value of bus_attach_device() in device_add(). Add a function bus_delete_device() that undos the effects of bus_add_device().
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
base.h | 1 + bus.c | 21 ++++++++++++++++++++- core.c | 6 +++++- 3 files changed, 26 insertions(+), 2 deletions(-) diff -Naurp linux-2.6.18-rc6/drivers/base/base.h linux-2.6.18-rc6+CH/drivers/base/base.h --- linux-2.6.18-rc6/drivers/base/base.h 2006-09-12 14:15:16.000000000 +0200 +++ linux-2.6.18-rc6+CH/drivers/base/base.h 2006-09-12 18:42:08.000000000 +0200 @@ -17,6 +17,7 @@ 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_delete_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 -Naurp linux-2.6.18-rc6/drivers/base/bus.c linux-2.6.18-rc6+CH/drivers/base/bus.c --- linux-2.6.18-rc6/drivers/base/bus.c 2006-09-12 18:28:12.000000000 +0200 +++ linux-2.6.18-rc6+CH/drivers/base/bus.c 2006-09-12 18:44:24.000000000 +0200 @@ -360,7 +360,7 @@ static void device_remove_attrs(struct b * bus_add_device - add device to bus * @dev: device being added * - * - Add the device to its bus's list of devices. + * - Add attributes. * - Create link to device's bus. */ int bus_add_device(struct device * dev) @@ -420,6 +420,25 @@ int bus_attach_device(struct device * de } /** + * bus_delete_device - undo bus_add_device + * @dev: device being deleted + * + * - Remove symlink from bus's directory. + * - Remove attributes. + * - Drop reference taken in bus_add_device(). + */ +void bus_delete_device(struct device * dev) +{ + if (dev->bus) { + sysfs_remove_link(&dev->kobj, "subsystem"); + sysfs_remove_link(&dev->kobj, "bus"); + sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id); + device_remove_attrs(dev->bus, dev); + put_bus(dev->bus); + } +} + +/** * bus_remove_device - remove device from bus * @dev: device to be removed * diff -Naurp linux-2.6.18-rc6/drivers/base/core.c linux-2.6.18-rc6+CH/drivers/base/core.c --- linux-2.6.18-rc6/drivers/base/core.c 2006-09-12 18:40:36.000000000 +0200 +++ linux-2.6.18-rc6+CH/drivers/base/core.c 2006-09-12 18:41:31.000000000 +0200 @@ -456,7 +456,9 @@ int device_add(struct device *dev) if ((error = bus_add_device(dev))) goto BusError; kobject_uevent(&dev->kobj, KOBJ_ADD); - bus_attach_device(dev); + error = bus_attach_device(dev); + if (error) + goto attachError; if (parent) klist_add_tail(&dev->knode_parent, &parent->klist_children); @@ -470,6 +472,8 @@ int device_add(struct device *dev) kfree(class_name); put_device(dev); return error; + attachError: + bus_delete_device(dev); BusError: device_pm_remove(dev); PMError: - 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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