From 599bad38cf7163123af7c9efea0fcf228bc74fe1 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 30 Sep 2014 13:02:02 +0200 Subject: driver core: Add BUS_NOTIFY_REMOVED_DEVICE event This event closes an important gap in the bus notifiers. There is already the BUS_NOTIFY_DEL_DEVICE event, but that is sent when the device is still bound to its device driver. This is too early for the IOMMU code to destroy any mappings for the device, as they might still be in use by the driver. The new BUS_NOTIFY_REMOVED_DEVICE event introduced with this patch closes this gap as it is sent when the device is already unbound from its device driver and almost completly removed from the driver core. With this event the IOMMU code can safely destroy any mappings and other data structures when a device is removed. Signed-off-by: Joerg Roedel Acked-by: Greg Kroah-Hartman Tested-by: Jerry Hoemann --- drivers/base/core.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/base/core.c') diff --git a/drivers/base/core.c b/drivers/base/core.c index 20da3ad1696b..7b270a2e6ed5 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1211,6 +1211,9 @@ void device_del(struct device *dev) */ if (platform_notify_remove) platform_notify_remove(dev); + if (dev->bus) + blocking_notifier_call_chain(&dev->bus->p->bus_notifier, + BUS_NOTIFY_REMOVED_DEVICE, dev); kobject_uevent(&dev->kobj, KOBJ_REMOVE); cleanup_device_parent(dev); kobject_del(&dev->kobj); -- cgit v1.2.3