diff options
| author | Joerg Roedel <jroedel@suse.de> | 2016-07-01 16:42:55 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2016-07-06 18:04:55 +0200 |
| commit | 522e5cb76d0663c88f96b6a8301451c8efa37207 (patch) | |
| tree | acdc27a0aaf522cc2f7441cbcbe11251e3029679 /fs | |
| parent | 0caa7616a6aca449dd68b58cb29bd491d296c2d5 (diff) | |
| download | linux-522e5cb76d0663c88f96b6a8301451c8efa37207.tar.bz2 | |
iommu/amd: Fix unity mapping initialization race
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: aafd8ba0ca74 ('iommu/amd: Implement add_device and remove_device')
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions