hwmon: (pwm-fan) disable threaded interrupts

The interrupt handler here just increments an atomic counter, jumping to
a threaded handler risks missing tachometer pulses and is likely to be
more expensive than the simple atomic increment.

Signed-off-by: John Keeping <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

Author: johnkeeping

drivers/hwmon/pwm-fan.c

@@ -620,8 +620,8 @@ static int pwm_fan_probe(struct platform_device *pdev)
 		if (tach->irq == -EPROBE_DEFER)
 			return tach->irq;
 		if (tach->irq > 0) {
-			ret = devm_request_irq(dev, tach->irq, pulse_handler, 0,
-					       pdev->name, tach);
+			ret = devm_request_irq(dev, tach->irq, pulse_handler,
+					       IRQF_NO_THREAD, pdev->name, tach);
 			if (ret) {
 				dev_err(dev,
 					"Failed to request interrupt: %d\n",