[PATCH 0/2][SRU][OEM-5.6] Restart the machine successfully after suspend

Koba Ko koba.ko at canonical.com
Wed Jul 22 06:44:43 UTC 2020

BugLink: https://bugs.launchpad.net/bugs/1888375 

After suspend then restart, the System would hang during shutdown.

The commit has pushed to upstream but still wait for the maintainer of IOMMU to apply.

Skip the TE disabling for the quirky gfx dedicated iommu and
the system would not hang during shutdown.

With the patch, the machine restart successfully.

[Regression Potential]
low, the patch just skip the TE disabling and wouldn't affect the normal usage.

Lu Baolu (1):
  UBUNTU: SAUCE: iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu

Rajat Jain (1):
  iommu/vt-d: Don't apply gfx quirks to untrusted devices

 drivers/iommu/dmar.c        |  1 +
 drivers/iommu/intel-iommu.c | 63 +++++++++++++++++++++++++++++++++++++
 include/linux/dmar.h        |  1 +
 include/linux/intel-iommu.h |  2 ++
 4 files changed, 67 insertions(+)


More information about the kernel-team mailing list