[media] radio-si470x: convert to use request_threaded_irq()

Signed-off-by: Joonyoung Shim <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/radio/si470x/radio-si470x-i2c.c

···
  **************************************************************************/
 
 /*
- * si470x_i2c_interrupt_work - rds processing function
+ * si470x_i2c_interrupt - interrupt handler
  */
-static void si470x_i2c_interrupt_work(struct work_struct *work)
+static irqreturn_t si470x_i2c_interrupt(int irq, void *dev_id)
 {
-	struct si470x_device *radio = container_of(work,
-			struct si470x_device, radio_work);
+	struct si470x_device *radio = dev_id;
 	unsigned char regnr;
 	unsigned char blocknum;
 	unsigned short bler; /* rds block errors */
···
 	/* check Seek/Tune Complete */
 	retval = si470x_get_register(radio, STATUSRSSI);
 	if (retval < 0)
-		return;
+		goto end;
 
 	if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
 		complete(&radio->completion);
 
 	/* safety checks */
 	if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
-		return;
+		goto end;
 
 	/* Update RDS registers */
 	for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) {
 		retval = si470x_get_register(radio, STATUSRSSI + regnr);
 		if (retval < 0)
-			return;
+			goto end;
 	}
 
 	/* get rds blocks */
 	if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0)
 		/* No RDS group ready, better luck next time */
-		return;
+		goto end;
 
 	for (blocknum = 0; blocknum < 4; blocknum++) {
 		switch (blocknum) {
···
 
 	if (radio->wr_index != radio->rd_index)
 		wake_up_interruptible(&radio->read_queue);
-}
 
-
-/*
- * si470x_i2c_interrupt - interrupt handler
- */
-static irqreturn_t si470x_i2c_interrupt(int irq, void *dev_id)
-{
-	struct si470x_device *radio = dev_id;
-
-	if (!work_pending(&radio->radio_work))
-		schedule_work(&radio->radio_work);
-
+end:
 	return IRQ_HANDLED;
 }
 
···
 		goto err_initial;
 	}
 
-	INIT_WORK(&radio->radio_work, si470x_i2c_interrupt_work);
 	radio->users = 0;
 	radio->client = client;
 	mutex_init(&radio->lock);
···
 	radio->stci_enabled = true;
 	init_completion(&radio->completion);
 
-	retval = request_irq(client->irq, si470x_i2c_interrupt,
+	retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
 			IRQF_TRIGGER_FALLING, DRIVER_NAME, radio);
 	if (retval) {
 		dev_err(&client->dev, "Failed to register interrupt\n");
···
 	struct si470x_device *radio = i2c_get_clientdata(client);
 
 	free_irq(client->irq, radio);
-	cancel_work_sync(&radio->radio_work);
 	video_unregister_device(radio->videodev);
 	kfree(radio);
 

drivers/media/radio/si470x/radio-si470x.h

···
 
 #if defined(CONFIG_I2C_SI470X) || defined(CONFIG_I2C_SI470X_MODULE)
 	struct i2c_client *client;
-	struct work_struct radio_work;
 #endif
 };