From: Joerg Roedel <jroedel@suse.de>
Date: Wed, 30 Jul 2014 14:04:37 +0000 (+0200)
Subject: iommu/amd: Don't set pasid_state->mm to NULL in unbind_pasid
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~158^2^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fcaa96060809224c4d2092e1e0d6efcf0d342bb4;p=pandora-kernel.git

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>
---

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