[0/6] nfit/ars: Improve polling and short-ARS execution

Message

Dan Williams Feb. 14, 2019, 8:10 p.m. UTC

Here is a small pile of updates to better coordinate the Linux ARS state
machine with platform-BIOS implementations. Specifically, take advantage
of opportunities to run short-ARS whenever the ARS interface is found to
be idle at init, always run short-ARS even if no_init_ars is specified,
allow root to reset the exponential backoff polling interval for ARS
completion, and protect the kernel against the consumption of stale ARS
results.

---

Dan Williams (6):
      nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot
      nfit/ars: Attempt short-ARS even in the no_init_ars case
      nfit/ars: Allow root to busy-poll the ARS state machine
      nfit/ars: Remove ars_start_flags
      nfit/ars: Introduce scrub_flags
      nfit/ars: Avoid stale ARS results


 drivers/acpi/nfit/core.c |   67 ++++++++++++++++++++++++++++++++--------------
 drivers/acpi/nfit/nfit.h |   10 +++++--
 2 files changed, 53 insertions(+), 24 deletions(-)