intel_th: msu: Fix single mode with IOMMU

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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: ba82664c13 ("intel_th: Add Memory Storage Unit driver")
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alexander Shishkin 2019-05-03 11:44:34 +03:00 • committed by Greg Kroah-Hartman

parent 9a552e271e

commit 4e0eaf239f

1 changed files with 32 additions and 3 deletions

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drivers/hwtracing/intel_th/msu.c

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