Files
linux/drivers/iommu
Joerg Roedel e205592b31 iommu/amd: Fix unity mapping initialization race
commit 522e5cb76d upstream.

There is a race condition in the AMD IOMMU init code that
causes requested unity mappings to be blocked by the IOMMU
for a short period of time. This results on boot failures
and IO_PAGE_FAULTs on some machines.

Fix this by making sure the unity mappings are installed
before all other DMA is blocked.

Fixes: aafd8ba0ca ('iommu/amd: Implement add_device and remove_device')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-07-27 09:47:32 -07:00
..
2015-02-03 18:47:18 +01:00
2015-07-28 15:48:01 +01:00