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    Subject[PATCH v4 3/3] ACPI / EC: Enable noirq stage event detection
    Date
    This patch enables noirq stage event detection for the EC driver.

    EC is a very special driver, required to detecting events throughout the
    entire suspend/resume process. Thus this patch enables event detection for
    EC during noirq stages to meet this requirement. This is done by making
    sure that the EC sleep APIs:
    acpi_ec_block_transactions()
    acpi_ec_unblock_transactions()
    rather than the EC driver suspend/resume hooks:
    acpi_ec_suspend()
    acpi_ec_resume()
    are the boundary of the EC event handling during suspend/resume, so that
    the ACPI sleep core can tune their invocation timing to handle special BIOS
    requirements.

    If this commit is bisected to be a regression culprit, please report this
    to bugzilla.kernel.org for further investigation.

    Link: https://bugzilla.kernel.org/show_bug.cgi?id=196129
    Signed-off-by: Lv Zheng <lv.zheng@intel.com>
    Tested-by: Tomislav Ivek <tomislav.ivek@gmail.com>
    ---
    drivers/acpi/ec.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
    index 9363656..36ce5e7 100644
    --- a/drivers/acpi/ec.c
    +++ b/drivers/acpi/ec.c
    @@ -157,7 +157,7 @@ static bool ec_no_wakeup __read_mostly;
    module_param(ec_no_wakeup, bool, 0644);
    MODULE_PARM_DESC(ec_no_wakeup, "Do not wake up from suspend-to-idle");

    -static bool ec_detect_noirq_events __read_mostly;
    +static bool ec_detect_noirq_events __read_mostly = true;
    module_param(ec_detect_noirq_events, bool, 0644);
    MODULE_PARM_DESC(ec_detect_noirq_events, "Enabling event detection during noirq stage");

    --
    2.7.4
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