net: ieee802154: mcr20a: Use IRQF_NO_AUTOEN flag in request_irq()

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable when request IRQ.

Fixes: 8c6ad9c ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
Reviewed-by: Miquel Raynal <[email protected]>
Signed-off-by: Jinjie Ruan <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Stefan Schmidt <[email protected]>

Author: Jinjie Ruan

drivers/net/ieee802154/mcr20a.c

@@ -1302,16 +1302,13 @@ mcr20a_probe(struct spi_device *spi)
 		irq_type = IRQF_TRIGGER_FALLING;
 
 	ret = devm_request_irq(&spi->dev, spi->irq, mcr20a_irq_isr,
-			       irq_type, dev_name(&spi->dev), lp);
+			       irq_type | IRQF_NO_AUTOEN, dev_name(&spi->dev), lp);
 	if (ret) {
 		dev_err(&spi->dev, "could not request_irq for mcr20a\n");
 		ret = -ENODEV;
 		goto free_dev;
 	}
 
-	/* disable_irq by default and wait for starting hardware */
-	disable_irq(spi->irq);
-
 	ret = ieee802154_register_hw(hw);
 	if (ret) {
 		dev_crit(&spi->dev, "ieee802154_register_hw failed\n");