commit fcaa96060809224c4d2092e1e0d6efcf0d342bb4
author Joerg Roedel <jroedel@suse.de> Wed Jul 30 16:04:37 2014 +0200
committer Joerg Roedel <jroedel@suse.de> Wed Jul 30 16:07:49 2014 +0200
tree 8fb3be362a38db6c038fddc8dd36a01878647304
parent d9e1611e7347b41bae8894e957a398fa41162dab

iommu/amd: Don't set pasid_state->mm to NULL in unbind_pasid

With calling te mmu_notifier_register function we hold a
reference to the mm_struct that needs to be released in
mmu_notifier_unregister. This is true even if the notifier
was already unregistered from exit_mmap and the .release
call-back has already run.

So make sure we call mmu_notifier_unregister unconditionally
in amd_iommu_unbind_pasid.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Oded Gabbay <oded.gabbay@amd.com>