tree a704d1bec65c7bda54af3dffbeca97feeb09c57c
parent 9f9499ae8e6415cefc4fe0a96ad0e27864353c89
author Joerg Roedel <jroedel@suse.de> 1447773096 +0100
committer Joerg Roedel <jroedel@suse.de> 1450103867 +0100

iommu/amd: Do proper access checking before calling handle_mm_fault()

The handle_mm_fault function expects the caller to do the
access checks. Not doing so and calling the function with
wrong permissions is a bug (catched by a BUG_ON).
So fix this bug by adding proper access checking to the io
page-fault code in the AMD IOMMUv2 driver.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>