Linux-ACPI Archive on lore.kernel.org
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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zhang Rui <rui.zhang@intel.com>,
	Zhao Lijian <lijian.zhao@intel.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-acpi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 286/671] ACPI: button: reinitialize button state upon resume
Date: Thu, 16 Jan 2020 11:58:44 -0500
Message-ID: <20200116170509.12787-23-sashal@kernel.org> (raw)
In-Reply-To: <20200116170509.12787-1-sashal@kernel.org>

From: Zhang Rui <rui.zhang@intel.com>

[ Upstream commit 13e962140be671f31a011543f11477af67a6c33e ]

With commit dfa46c50f65b ("ACPI / button: Fix an issue in
button.lid_init_state=ignore mode"), the lid device is considered to be
not compliant to SW_LID if the Lid state is unchanged when updating it.

This is not wrong, but we overlooked the resume case, where Lid state is
updated unconditionally in the button driver .resume() callback. And this
results in warning message "ACPI: button: The lid device is not compliant
to  SW_LID." after resume, if the machine is suspended with Lid opened and
then resumed with Lid opened.

Fix this by flushing the cached lid state before updating the Lid device
in .resume() callback.

Fixes: dfa46c50f65b ("ACPI / button: Fix an issue in button.lid_init_state=ignore mode")
Reported-and-tested-by: Zhao Lijian <lijian.zhao@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/button.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 870eb5c7516a..a25d77b3a16a 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -467,8 +467,11 @@ static int acpi_button_resume(struct device *dev)
 	struct acpi_button *button = acpi_driver_data(device);
 
 	button->suspended = false;
-	if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users)
+	if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users) {
+		button->last_state = !!acpi_lid_evaluate_state(device);
+		button->last_time = ktime_get();
 		acpi_lid_initialize_state(device);
+	}
 	return 0;
 }
 #endif
-- 
2.20.1


       reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116170509.12787-1-sashal@kernel.org>
2020-01-16 16:58 ` Sasha Levin [this message]
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 447/671] PM: ACPI/PCI: Resume all devices during hibernation Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 448/671] ACPI: PM: Simplify and fix PM domain hibernation callbacks Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 449/671] ACPI: PM: Introduce "poweroff" callbacks for ACPI PM domain and LPSS Sasha Levin

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