linux-kernel - [PATCH v3 3/4] ACPI / EC: Add support to handle EC events earlier

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Message-Id: <344e4a55bac9c1cd53c95eba563cdeeeb23bd479.1502432974.git.lv.zheng@intel.com>
Date:   Fri, 11 Aug 2017 14:36:39 +0800
From:   Lv Zheng <lv.zheng@...el.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>
Cc:     Lv Zheng <lv.zheng@...el.com>, Lv Zheng <zetalog@...il.com>,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [PATCH v3 3/4] ACPI / EC: Add support to handle EC events earlier

Now as GPE poller is implemented, EC driver is able to detect EC events
during suspend/resume noirq stages, we can try to move EC event handling
earlier without being worried about post-resume event stuck. This may help
to solve driver order issues during resume.

Signed-off-by: Lv Zheng <lv.zheng@...el.com>
Tested-by: Tomislav Ivek <tomislav.ivek@...il.com>
---
 drivers/acpi/ec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5be62933..396e81d 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1016,7 +1016,9 @@ static void acpi_ec_start(struct acpi_ec *ec, bool resuming)
 		if (!resuming) {
 			acpi_ec_submit_request(ec);
 			ec_dbg_ref(ec, "Increase driver");
-		}
+		} else if (!ec_freeze_events &&
+			   ec_gpe_polling == ACPI_EC_GPE_POLL_RESUME)
+			__acpi_ec_enable_event(ec);
 		ec_log_drv("EC started");
 	}
 	spin_unlock_irqrestore(&ec->lock, flags);
-- 
2.7.4