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Subject[RFC PATCH v6 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 389c499..a48a2b3 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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