[SRU] [Yakkety] [Zesty] [PATCH 0/2] New Quirk for NVMe APST

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1678184

Impact:
Several users reported that their NVMe stopped to work correctly after
NVMe APST is enabled.
Affected users confirmed disable deepest state (ps 4) can workaround the issue
on Dell Precision 5510 / XPS 9550 with Samsung NVMe.
There's also a Thoshiba NVMe requires disabling all power state.

Fix:
A new quirk to disable deepest power state on above mentioned Dell & Samsung
combination.
Also, disable the malfunction Toshiba NVMe.

This fix is in Jens Axboe's block tree, hasn't landed in Linus' tree yet.

Test:
A user reported back this new quirk works on his system.

Andy Lutomirski (2):
  nvme: Adjust the Samsung APST quirk
  nvme: Quirk APST off on "THNSF5256GPUK TOSHIBA"

 drivers/nvme/host/core.c | 23 +++++++++++++++--------
 drivers/nvme/host/nvme.h |  5 +++++
 drivers/nvme/host/pci.c  | 26 +++++++++++++++++++++++++-
 3 files changed, 45 insertions(+), 9 deletions(-)

-- 
2.12.2