linux-kernel - [PATCH] Fix freeze in lm8333 i2c keyboard driver

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Message-Id: <20230425130054.591007-1-tomas.mudrunka@gmail.com>
Date:   Tue, 25 Apr 2023 15:00:53 +0200
From:   Tomas Mudrunka <tomas.mudrunka@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Tomas Mudrunka <tomas.mudrunka@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Fix freeze in lm8333 i2c keyboard driver

LM8333 uses gpio interrupt line which is active-low.
When interrupt is set to FALLING edge and button is pressed
before driver loads, driver will miss the edge and never respond.
To fix this we handle ONESHOT LOW interrupt rather than edge.

Signed-off-by: Tomas Mudrunka <tomas.mudrunka@...il.com>
---
 drivers/input/keyboard/lm8333.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/keyboard/lm8333.c b/drivers/input/keyboard/lm8333.c
index 7457c3220..c5770ebb2 100644
--- a/drivers/input/keyboard/lm8333.c
+++ b/drivers/input/keyboard/lm8333.c
@@ -179,7 +179,7 @@ static int lm8333_probe(struct i2c_client *client)
 	}
 
 	err = request_threaded_irq(client->irq, NULL, lm8333_irq_thread,
-				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 				   "lm8333", lm8333);
 	if (err)
 		goto free_mem;
-- 
2.40.0