can: m_can: Disable unused interrupts

There are a number of interrupts that are not used by the driver at the
moment. Disable all of these.

Signed-off-by: Markus Schneider-Pargmann <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Link: https://lore.kernel.org/all/[e-mail]
Signed-off-by: Marc Kleine-Budde <[e-mail]>

drivers/net/can/m_can/m_can.c

···
 static int m_can_chip_config(struct net_device *dev)
 {
 	struct m_can_classdev *cdev = netdev_priv(dev);
+	u32 interrupts = IR_ALL_INT;
 	u32 cccr, test;
 	int err;
 
···
 		dev_err(cdev->dev, "Message RAM configuration failed\n");
 		return err;
 	}
+
+	/* Disable unused interrupts */
+	interrupts &= ~(IR_ARA | IR_ELO | IR_DRX | IR_TEFF | IR_TEFW | IR_TFE |
+			IR_TCF | IR_HPM | IR_RF1F | IR_RF1W | IR_RF1N |
+			IR_RF0F | IR_RF0W);
 
 	m_can_config_endisable(cdev, true);
 
···
 	m_can_write(cdev, M_CAN_TEST, test);
 
 	/* Enable interrupts */
-	if (!(cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING))
+	if (!(cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) {
 		if (cdev->version == 30)
-			m_can_write(cdev, M_CAN_IE, IR_ALL_INT &
-				    ~(IR_ERR_LEC_30X));
+			interrupts &= ~(IR_ERR_LEC_30X);
 		else
-			m_can_write(cdev, M_CAN_IE, IR_ALL_INT &
-				    ~(IR_ERR_LEC_31X));
-	else
-		m_can_write(cdev, M_CAN_IE, IR_ALL_INT);
+			interrupts &= ~(IR_ERR_LEC_31X);
+	}
+	m_can_write(cdev, M_CAN_IE, interrupts);
 
 	/* route all interrupts to INT0 */
 	m_can_write(cdev, M_CAN_ILS, ILS_ALL_INT0);