linux-kernel - [PATCH AUTOSEL 5.10 02/15] HID: cp2112: Fix driver not registering GPIO IRQ chip as threaded

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Message-Id: <20230320005559.1429040-2-sashal@kernel.org>
Date:   Sun, 19 Mar 2023 20:55:46 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Danny Kaehn <kaehndan@...il.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Sasha Levin <sashal@...nel.org>, jikos@...nel.org,
        linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 02/15] HID: cp2112: Fix driver not registering GPIO IRQ chip as threaded

From: Danny Kaehn <kaehndan@...il.com>

[ Upstream commit 37f5b858a66543b2b67c0288280af623985abc29 ]

The CP2112 generates interrupts from a polling routine on a thread,
and can only support threaded interrupts. This patch configures the
gpiochip irq chip with this flag, disallowing consumers to request
a hard IRQ from this driver, which resulted in a segfault previously.

Signed-off-by: Danny Kaehn <kaehndan@...il.com>
Link: https://lore.kernel.org/r/20230210170044.11835-1-kaehndan@gmail.com
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/hid-cp2112.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c
index 172f20e88c6c9..d902fe43cb818 100644
--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -1352,6 +1352,7 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	girq->parents = NULL;
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_simple_irq;
+	girq->threaded = true;
 
 	ret = gpiochip_add_data(&dev->gc, dev);
 	if (ret < 0) {
-- 
2.39.2