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    Subject[PATCH 4.19 115/280] nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot
    Date
    4.19-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Dan Williams <dan.j.williams@intel.com>

    commit c6c5df293bf1b488cf8459aac658aecfdccb13a9 upstream.

    If query-ARS reports that ARS has stopped and requires continuation
    attempt to retrieve short-ARS results before continuing the long
    operation.

    Fixes: bc6ba8085842 ("nfit, address-range-scrub: rework and simplify ARS...")
    Cc: <stable@vger.kernel.org>
    Reported-by: Krzysztof Rusocki <krzysztof.rusocki@intel.com>
    Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
    Signed-off-by: Dan Williams <dan.j.williams@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/acpi/nfit/core.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/acpi/nfit/core.c
    +++ b/drivers/acpi/nfit/core.c
    @@ -2900,6 +2900,7 @@ static int ars_register(struct acpi_nfit

    switch (acpi_nfit_query_poison(acpi_desc)) {
    case 0:
    + case -ENOSPC:
    case -EAGAIN:
    rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
    /* shouldn't happen, try again later */
    @@ -2924,7 +2925,6 @@ static int ars_register(struct acpi_nfit
    break;
    case -EBUSY:
    case -ENOMEM:
    - case -ENOSPC:
    /*
    * BIOS was using ARS, wait for it to complete (or
    * resources to become available) and then perform our

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