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Commit 309b7d60 authored by Joerg Roedel's avatar Joerg Roedel Committed by Greg Kroah-Hartman
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driver core: add BUS_NOTIFY_UNBOUND_DRIVER event 



This patch adds a new bus notifier event which is emitted _after_ a
device is removed from its driver. This event will be used by the
dma-api debug code to check if a driver has released all dma allocations
for that device.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6acf70f0

drivers/base/dd.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -320,6 +320,10 @@ static void __device_release_driver(struct device *dev) 
		devres_release_all(dev);

		devres_release_all(dev);

		dev->driver = NULL;

		dev->driver = NULL;

		klist_remove(&dev->p->knode_driver);

		klist_remove(&dev->p->knode_driver);

		if (dev->bus)

			blocking_notifier_call_chain(&dev->bus->p->bus_notifier,

						     BUS_NOTIFY_UNBOUND_DRIVER,

						     dev);

	}

	}

}

}

include/linux/device.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -114,6 +114,8 @@ extern int bus_unregister_notifier(struct bus_type *bus, 
#define BUS_NOTIFY_BOUND_DRIVER		0x00000003 /* driver bound to device */

#define BUS_NOTIFY_BOUND_DRIVER		0x00000003 /* driver bound to device */

#define BUS_NOTIFY_UNBIND_DRIVER	0x00000004 /* driver about to be

#define BUS_NOTIFY_UNBIND_DRIVER	0x00000004 /* driver about to be

						      unbound */

						      unbound */

#define BUS_NOTIFY_UNBOUND_DRIVER	0x00000005 /* driver is unbound

						      from the device */





extern struct kset *bus_get_kset(struct bus_type *bus);

extern struct kset *bus_get_kset(struct bus_type *bus);

extern struct klist *bus_get_device_klist(struct bus_type *bus);

extern struct klist *bus_get_device_klist(struct bus_type *bus);