linux-kernel - [PATCH 21/21] media: pci: mg4b: Use IRQF_NO

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Message-ID: <20260123113708.416727-22-bigeasy@linutronix.de>
Date: Fri, 23 Jan 2026 12:37:07 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: linux-kernel@...r.kernel.org
Cc: linux-rt-devel@...ts.linux.dev,
	Thomas Gleixner <tglx@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Martin Tuma <martin.tuma@...iteqautomotive.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org
Subject: [PATCH 21/21] media: pci: mg4b: Use IRQF_NO_THREAD

The interrupt handler iio_trigger_generic_data_rdy_poll() will invoke
other interrupt handler and this supposed to happen from within the
hardirq.

Use IRQF_NO_THREAD to forbid forced-threading.

Cc: Martin Tuma <martin.tuma@...iteqautomotive.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org
Fixes: 0ab13674a9bd1 ("media: pci: mgb4: Added Digiteq Automotive MGB4 driver")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/media/pci/mgb4/mgb4_trigger.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/mgb4/mgb4_trigger.c b/drivers/media/pci/mgb4/mgb4_trigger.c
index 4f9a35904b418..70cad324df608 100644
--- a/drivers/media/pci/mgb4/mgb4_trigger.c
+++ b/drivers/media/pci/mgb4/mgb4_trigger.c
@@ -115,7 +115,7 @@ static int probe_trigger(struct iio_dev *indio_dev, int irq)
 	if (!st->trig)
 		return -ENOMEM;
 
-	ret = request_irq(irq, &iio_trigger_generic_data_rdy_poll, 0,
+	ret = request_irq(irq, &iio_trigger_generic_data_rdy_poll, IRQF_NO_THREAD,
 			  "mgb4-trigger", st->trig);
 	if (ret)
 		goto error_free_trig;
-- 
2.51.0