iommu/vt-d: Use BUS_NOTIFY_REMOVED_DEVICE in hotplug path

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commit e6a8c9b337 upstream.

In the PCI hotplug path of the Intel IOMMU driver, replace
the usage of the BUS_NOTIFY_DEL_DEVICE notifier, which is
executed before the driver is unbound from the device, with
BUS_NOTIFY_REMOVED_DEVICE, which runs after that.

This fixes a kernel BUG being triggered in the VT-d code
when the device driver tries to unmap DMA buffers and the
VT-d driver already destroyed all mappings.

Reported-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Joerg Roedel 2016-02-29 23:49:47 +01:00 • committed by Greg Kroah-Hartman

parent 44792d5c90

commit 00548ecff5

2 changed files with 5 additions and 4 deletions

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5

drivers/iommu/dmar.c

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4

drivers/iommu/intel-iommu.c

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