Changes since v1: [1] * Fix the root poll interval support to avoid a infinite loop condition when the polling is faster than the ARS completion. * Move the introduction of scrub_flags earlier in the series and introduce ARS_POLL to fix the above issue.
[1]: https://lists.01.org/pipermail/linux-nvdimm/2019-February/019964.html --- 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: Remove ars_start_flags nfit/ars: Introduce scrub_flags nfit/ars: Allow root to busy-poll the ARS state machine nfit/ars: Avoid stale ARS results drivers/acpi/nfit/core.c | 70 ++++++++++++++++++++++++++++++++-------------- drivers/acpi/nfit/nfit.h | 11 +++++-- 2 files changed, 57 insertions(+), 24 deletions(-)
