linux-kernel - [PATCH 3/3] mfd: rk8xx-core: Fix interrupt processing order for power key button

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Date: Sat, 17 Feb 2024 20:54:35 +0100
From: Ondřej Jirman <megi@....cz>
To: linux-kernel@...r.kernel.org
Cc: Ondrej Jirman <megi@....cz>,
	Lee Jones <lee@...nel.org>
Subject: [PATCH 3/3] mfd: rk8xx-core: Fix interrupt processing order for power key button

From: Ondrej Jirman <megi@....cz>

Process rise event last, to avoid stuck keys when multiple interrupts
are coalesced. This can happen typically when resuming from suspend
via power key press and holding the power button for a bit too short,
so that RISE an FALL IRQ flags are set before any interrupt routine
has a chance to run.

Input subsystem will interpret it as holding down a power key for
a long time, which leads to unintended initiation of shutdown UI
on some OSes.

Signed-off-by: Ondrej Jirman <megi@....cz>
---
 drivers/mfd/rk8xx-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/rk8xx-core.c b/drivers/mfd/rk8xx-core.c
index b1ffc3b9e2be..e2261b68b844 100644
--- a/drivers/mfd/rk8xx-core.c
+++ b/drivers/mfd/rk8xx-core.c
@@ -43,8 +43,8 @@ static struct resource rk806_pwrkey_resources[] = {
 };

 static const struct resource rk817_pwrkey_resources[] = {
-	DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
 	DEFINE_RES_IRQ(RK817_IRQ_PWRON_FALL),
+	DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
 };

 static const struct resource rk817_charger_resources[] = {
-- 
2.43.0