tree f18a09e59a3f92f670a701de32ef41a81542dd4c
parent 67f8d96a2cbfa4b6b3b09e0bacb1be8af01bf048
author Alexander Shishkin <alexander.shishkin@linux.intel.com> 1556873074 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1558801519 +0200

intel_th: msu: Fix single mode with IOMMU

commit 4e0eaf239fb33ebc671303e2b736fa043462e2f4 upstream.

Currently, the pages that are allocated for the single mode of MSC are not
mapped into the device's dma space and the code is incorrectly using
*_to_phys() in place of a dma address. This fails with IOMMU enabled and
is otherwise bad practice.

Fix the single mode buffer allocation to map the pages into the device's
DMA space.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: ba82664c134e ("intel_th: Add Memory Storage Unit driver")
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>