drivers/staging/pi433: Fixing coding guidelines

index 93c0168..c070cf3 100644
@@ -133,19 +133,16 @@ static irqreturn_t DIO0_irq_handler(int irq, void *dev_id)
 {
 	struct pi433_device *device = dev_id;
 
-	if      (device->irq_state[DIO0] == DIO_PacketSent)
-	{
+	if      (device->irq_state[DIO0] == DIO_PacketSent) {
 		device->free_in_fifo = FIFO_SIZE;
 		printk("DIO0 irq: Packet sent\n"); // TODO: printk() should include KERN_ facility level
 		wake_up_interruptible(&device->fifo_wait_queue);
 	}
-	else if (device->irq_state[DIO0] == DIO_Rssi_DIO0)
-	{
+	else if (device->irq_state[DIO0] == DIO_Rssi_DIO0) {
 		printk("DIO0 irq: RSSI level over threshold\n");
 		wake_up_interruptible(&device->rx_wait_queue);
 	}
-	else if (device->irq_state[DIO0] == DIO_PayloadReady)
-	{
+	else if (device->irq_state[DIO0] == DIO_PayloadReady) {
 		printk("DIO0 irq: PayloadReady\n");
 		device->free_in_fifo = 0;
 		wake_up_interruptible(&device->fifo_wait_queue);

@@ -158,12 +155,10 @@ static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
 {
 	struct pi433_device *device = dev_id;
 
-	if      (device->irq_state[DIO1] == DIO_FifoNotEmpty_DIO1)
-	{
+	if      (device->irq_state[DIO1] == DIO_FifoNotEmpty_DIO1) {
 		device->free_in_fifo = FIFO_SIZE;
 	}
-	else if (device->irq_state[DIO1] == DIO_FifoLevel)
-	{
+	else if (device->irq_state[DIO1] == DIO_FifoLevel) {
 		if (device->rx_active)	device->free_in_fifo = FIFO_THRESHOLD - 1;
 		else			device->free_in_fifo = FIFO_SIZE - FIFO_THRESHOLD - 1;
 	}

@@ -197,12 +192,10 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 	/* packet config */
 	/* enable */
 	SET_CHECKED(rf69_set_sync_enable(dev->spi, rx_cfg->enable_sync));
-	if (rx_cfg->enable_sync == optionOn)
-	{
+	if (rx_cfg->enable_sync == optionOn) {
 		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, afterSyncInterrupt));
 	}
-	else
-	{
+	else {
 		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, always));
 	}
 	if (rx_cfg->enable_length_byte == optionOn) {

@@ -219,29 +212,24 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 
 	/* lengths */
 	SET_CHECKED(rf69_set_sync_size(dev->spi, rx_cfg->sync_length));
-	if (rx_cfg->enable_length_byte == optionOn)
-	{
+	if (rx_cfg->enable_length_byte == optionOn) {
 		SET_CHECKED(rf69_set_payload_length(dev->spi, 0xff));
 	}
-	else if (rx_cfg->fixed_message_length != 0)
-	{
+	else if (rx_cfg->fixed_message_length != 0) {
 		payload_length = rx_cfg->fixed_message_length;
 		if (rx_cfg->enable_length_byte  == optionOn) payload_length++;
 		if (rx_cfg->enable_address_filtering != filteringOff) payload_length++;
 		SET_CHECKED(rf69_set_payload_length(dev->spi, payload_length));
 	}
-	else
-	{
+	else {
 		SET_CHECKED(rf69_set_payload_length(dev->spi, 0));
 	}
 
 	/* values */
-	if (rx_cfg->enable_sync == optionOn)
-	{
+	if (rx_cfg->enable_sync == optionOn) {
 		SET_CHECKED(rf69_set_sync_values(dev->spi, rx_cfg->sync_pattern));
 	}
-	if (rx_cfg->enable_address_filtering != filteringOff)
-	{
+	if (rx_cfg->enable_address_filtering != filteringOff) {
 		SET_CHECKED(rf69_set_node_address     (dev->spi, rx_cfg->node_address));
 		SET_CHECKED(rf69_set_broadcast_address(dev->spi, rx_cfg->broadcast_address));
 	}

@@ -263,12 +251,10 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 	SET_CHECKED(rf69_set_tx_start_condition(dev->spi, tx_cfg->tx_start_condition));
 
 	/* packet format enable */
-	if (tx_cfg->enable_preamble == optionOn)
-	{
+	if (tx_cfg->enable_preamble == optionOn) {
 		SET_CHECKED(rf69_set_preamble_length(dev->spi, tx_cfg->preamble_length));
 	}
-	else
-	{
+	else {
 		SET_CHECKED(rf69_set_preamble_length(dev->spi, 0));
 	}
 	SET_CHECKED(rf69_set_sync_enable  (dev->spi, tx_cfg->enable_sync));

@@ -284,8 +270,7 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 	SET_CHECKED(rf69_set_crc_enable	  (dev->spi, tx_cfg->enable_crc));
 
 	/* configure sync, if enabled */
-	if (tx_cfg->enable_sync == optionOn)
-	{
+	if (tx_cfg->enable_sync == optionOn) {
 		SET_CHECKED(rf69_set_sync_size(dev->spi, tx_cfg->sync_length));
 		SET_CHECKED(rf69_set_sync_values(dev->spi, tx_cfg->sync_pattern));
 	}

@@ -341,8 +326,7 @@ pi433_receive(void *data)
 	/* wait for any tx to finish */
 	dev_dbg(dev->dev,"rx: going to wait for any tx to finish");
 	retval = wait_event_interruptible(dev->rx_wait_queue, !dev->tx_active);
-	if(retval) /* wait was interrupted */
-	{
+	if(retval) { /* wait was interrupted */ 
 		dev->interrupt_rx_allowed = true;
 		wake_up_interruptible(&dev->tx_wait_queue);
 		return retval;

@@ -383,32 +367,27 @@ pi433_receive(void *data)
 	irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
 
 	/* fixed or unlimited length? */
-	if (dev->rx_cfg.fixed_message_length != 0)
-	{
-		if (dev->rx_cfg.fixed_message_length > dev->rx_buffer_size)
-		{
+	if (dev->rx_cfg.fixed_message_length != 0) {
+		if (dev->rx_cfg.fixed_message_length > dev->rx_buffer_size) {
 			retval = -1;
 			goto abort;
 		}
 		bytes_total = dev->rx_cfg.fixed_message_length;
 		dev_dbg(dev->dev,"rx: msg len set to %d by fixed length", bytes_total);
 	}
-	else
-	{
+	else {
 		bytes_total = dev->rx_buffer_size;
 		dev_dbg(dev->dev, "rx: msg len set to %d as requested by read", bytes_total);
 	}
 
 	/* length byte enabled? */
-	if (dev->rx_cfg.enable_length_byte == optionOn)
-	{
+	if (dev->rx_cfg.enable_length_byte == optionOn) {
 		retval = wait_event_interruptible(dev->fifo_wait_queue,
 						  dev->free_in_fifo < FIFO_SIZE);
 		if (retval) goto abort; /* wait was interrupted */
 
 		rf69_read_fifo(spi, (u8 *)&bytes_total, 1);
-		if (bytes_total > dev->rx_buffer_size)
-		{
+		if (bytes_total > dev->rx_buffer_size) {
 			retval = -1;
 			goto abort;
 		}

@@ -417,8 +396,7 @@ pi433_receive(void *data)
 	}
 
 	/* address byte enabled? */
-	if (dev->rx_cfg.enable_address_filtering != filteringOff)
-	{
+	if (dev->rx_cfg.enable_address_filtering != filteringOff) {
 		u8 dummy;
 
 		bytes_total--;

@@ -435,8 +413,7 @@ pi433_receive(void *data)
 	/* get payload */
 	while (dev->rx_position < bytes_total)
 	{
-		if ( !rf69_get_flag(dev->spi, payloadReady) )
-		{
+		if ( !rf69_get_flag(dev->spi, payloadReady) ) {
 			retval = wait_event_interruptible(dev->fifo_wait_queue,
 							  dev->free_in_fifo < FIFO_SIZE);
 			if (retval) goto abort; /* wait was interrupted */

@@ -508,16 +485,14 @@ pi433_tx_thread(void *data)
 		mutex_lock(&device->tx_fifo_lock);
 
 		retval = kfifo_out(&device->tx_fifo, &tx_cfg, sizeof(tx_cfg));
-		if (retval != sizeof(tx_cfg))
-		{
+		if (retval != sizeof(tx_cfg)) {
 			dev_dbg(device->dev, "reading tx_cfg from fifo failed: got %d byte(s), expected %d", retval, (unsigned int)sizeof(tx_cfg) );
 			mutex_unlock(&device->tx_fifo_lock);
 			continue;
 		}
 
 		retval = kfifo_out(&device->tx_fifo, &size, sizeof(size_t));
-		if (retval != sizeof(size_t))
-		{
+		if (retval != sizeof(size_t)) {
 			dev_dbg(device->dev, "reading msg size from fifo failed: got %d, expected %d", retval, (unsigned int)sizeof(size_t) );
 			mutex_unlock(&device->tx_fifo_lock);
 			continue;

@@ -568,8 +543,7 @@ pi433_tx_thread(void *data)
 		disable_irq(device->irq_num[DIO0]);
 		device->tx_active = true;
 
-		if (device->rx_active && rx_interrupted == false)
-		{
+		if (device->rx_active && rx_interrupted == false) {
 			/* rx is currently waiting for a telegram;
 			 * we need to set the radio module to standby
 			 */

@@ -580,12 +554,10 @@ pi433_tx_thread(void *data)
 		/* clear fifo, set fifo threshold, set payload length */
 		SET_CHECKED(rf69_set_mode(spi, standby)); /* this clears the fifo */
 		SET_CHECKED(rf69_set_fifo_threshold(spi, FIFO_THRESHOLD));
-		if (tx_cfg.enable_length_byte == optionOn)
-		{
+		if (tx_cfg.enable_length_byte == optionOn) {
 			SET_CHECKED(rf69_set_payload_length(spi, size * tx_cfg.repetitions));
 		}
-		else
-		{
+		else {
 			SET_CHECKED(rf69_set_payload_length(spi, 0));
 		}
 

@@ -612,8 +584,7 @@ pi433_tx_thread(void *data)
 		repetitions = tx_cfg.repetitions;
 		while( (repetitions > 0) && (size > position) )
 		{
-			if ( (size - position) > device->free_in_fifo)
-			{	/* msg to big for fifo - take a part */
+			if ( (size - position) > device->free_in_fifo) {	/* msg to big for fifo - take a part */
 				int temp = device->free_in_fifo;
 				device->free_in_fifo = 0;
 				rf69_write_fifo(spi,

@@ -621,8 +592,7 @@ pi433_tx_thread(void *data)
 				                temp);
 				position +=temp;
 			}
-			else
-			{	/* msg fits into fifo - take all */
+			else {	/* msg fits into fifo - take all */
 				device->free_in_fifo -= size;
 				repetitions--;
 				rf69_write_fifo(spi,

@@ -649,11 +619,9 @@ pi433_tx_thread(void *data)
 		SET_CHECKED(rf69_set_mode(spi, standby));
 
 		/* everything sent? */
-		if ( kfifo_is_empty(&device->tx_fifo) )
-		{
+		if ( kfifo_is_empty(&device->tx_fifo) ) {
 abort:
-			if (rx_interrupted)
-			{
+			if (rx_interrupted) {
 				rx_interrupted = false;
 				pi433_start_rx(device);
 			}

@@ -682,13 +650,11 @@ pi433_read(struct file *filp, char __user *buf, size_t size, loff_t *f_pos)
 
 	/* just one read request at a time */
 	mutex_lock(&device->rx_lock);
-	if (device->rx_active)
-	{
+	if (device->rx_active) {
 		mutex_unlock(&device->rx_lock);
 		return -EAGAIN;
 	}
-	else
-	{
+	else {
 		device->rx_active = true;
 		mutex_unlock(&device->rx_lock);
 	}

@@ -704,8 +670,7 @@ pi433_read(struct file *filp, char __user *buf, size_t size, loff_t *f_pos)
 	mutex_unlock(&device->rx_lock);
 
 	/* if read was successful copy to user space*/
-	if (bytes_received > 0)
-	{
+	if (bytes_received > 0) {
 		retval = copy_to_user(buf, device->rx_buffer, bytes_received);
 		if (retval)
 			return -EFAULT;

@@ -805,16 +770,14 @@ pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	switch (cmd) {
 	case PI433_IOC_RD_TX_CFG:
 		tmp = _IOC_SIZE(cmd);
-		if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) )
-		{
+		if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) ) {
 			retval = -EINVAL;
 			break;
 		}
 
 		if (__copy_to_user((void __user *)arg,
 				    &instance->tx_cfg,
-				    tmp))
-		{
+				    tmp)) {
 			retval = -EFAULT;
 			break;
 		}

@@ -822,16 +785,14 @@ pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		break;
 	case PI433_IOC_WR_TX_CFG:
 		tmp = _IOC_SIZE(cmd);
-		if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) )
-		{
+		if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) ) {
 			retval = -EINVAL;
 			break;
 		}
 
 		if (__copy_from_user(&instance->tx_cfg,
 				     (void __user *)arg,
-				     tmp))
-		{
+				     tmp)) {
 			retval = -EFAULT;
 			break;
 		}

@@ -847,8 +808,7 @@ pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
 		if (__copy_to_user((void __user *)arg,
 				   &device->rx_cfg,
-				   tmp))
-		{
+				   tmp)) {
 			retval = -EFAULT;
 			break;
 		}

@@ -873,8 +833,7 @@ pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
 		if (__copy_from_user(&device->rx_cfg,
 				     (void __user *)arg,
-				     tmp))
-		{
+				     tmp)) {
 			retval = -EFAULT;
 			mutex_unlock(&device->rx_lock);
 			break;

@@ -916,8 +875,7 @@ static int pi433_open(struct inode *inode, struct file *filp)
 
 	if (!device->rx_buffer) {
 		device->rx_buffer = kmalloc(MAX_MSG_SIZE, GFP_KERNEL);
-		if (!device->rx_buffer)
-		{
+		if (!device->rx_buffer) {
 			dev_dbg(device->dev, "open/ENOMEM\n");
 			return -ENOMEM;
 		}

@@ -925,8 +883,7 @@ static int pi433_open(struct inode *inode, struct file *filp)
 
 	device->users++;
 	instance = kzalloc(sizeof(*instance), GFP_KERNEL);
-	if (!instance)
-	{
+	if (!instance) {
 		kfree(device->rx_buffer);
 		device->rx_buffer = NULL;
 		return -ENOMEM;

@@ -986,8 +943,7 @@ static int setup_GPIOs(struct pi433_device *device)
 		snprintf(name, sizeof(name), "DIO%d", i);
 		device->gpiod[i] = gpiod_get(&device->spi->dev, name, 0 /*GPIOD_IN*/);
 
-		if (device->gpiod[i] == ERR_PTR(-ENOENT))
-		{
+		if (device->gpiod[i] == ERR_PTR(-ENOENT)) {
 			dev_dbg(&device->spi->dev, "Could not find entry for %s. Ignoring.", name);
 			continue;
 		}

@@ -995,8 +951,7 @@ static int setup_GPIOs(struct pi433_device *device)
 		if (device->gpiod[i] == ERR_PTR(-EBUSY))
 			dev_dbg(&device->spi->dev, "%s is busy.", name);
 
-		if ( IS_ERR(device->gpiod[i]) )
-		{
+		if ( IS_ERR(device->gpiod[i]) ) {
 			retval = PTR_ERR(device->gpiod[i]);
 			/* release already allocated gpios */
 			for (i--; i>=0; i--)

@@ -1016,8 +971,7 @@ static int setup_GPIOs(struct pi433_device *device)
 
 		/* configure irq */
 		device->irq_num[i] = gpiod_to_irq(device->gpiod[i]);
-		if (device->irq_num[i] < 0)
-		{
+		if (device->irq_num[i] < 0) {
 			device->gpiod[i] = ERR_PTR(-EINVAL);//(struct gpio_desc *)device->irq_num[i];
 			return device->irq_num[i];
 		}

@@ -1105,13 +1059,11 @@ static int pi433_probe(struct spi_device *spi)
 	/* spi->max_speed_hz = 10000000;  1MHz already set by device tree overlay */
 
 	retval = spi_setup(spi);
-	if (retval)
-	{
+	if (retval) {
 		dev_dbg(&spi->dev, "configuration of SPI interface failed!\n");
 		return retval;
 	}
-	else
-	{
+	else {
 		dev_dbg(&spi->dev,
 			"spi interface setup: mode 0x%2x, %d bits per word, %dhz max speed",
 			spi->mode, spi->bits_per_word, spi->max_speed_hz);

@@ -1156,8 +1108,7 @@ static int pi433_probe(struct spi_device *spi)
 
 	/* setup GPIO (including irq_handler) for the different DIOs */
 	retval = setup_GPIOs(device);
-	if (retval)
-	{
+	if (retval) {
 		dev_dbg(&spi->dev, "setup of GPIOs failed");
 		goto GPIO_failed;
 	}

@@ -1175,16 +1126,14 @@ static int pi433_probe(struct spi_device *spi)
 	device->tx_task_struct = kthread_run(pi433_tx_thread,
 					     device,
 					     "pi433_tx_task");
-	if (IS_ERR(device->tx_task_struct))
-	{
+	if (IS_ERR(device->tx_task_struct)) {
 		dev_dbg(device->dev, "start of send thread failed");
 		goto send_thread_failed;
 	}
 
 	/* determ minor number */
 	retval = pi433_get_minor(device);
-	if (retval)
-	{
+	if (retval) {
 		dev_dbg(device->dev, "get of minor number failed");
 		goto minor_failed;
 	}

@@ -1213,8 +1162,7 @@ static int pi433_probe(struct spi_device *spi)
 	device->cdev->owner = THIS_MODULE;
 	cdev_init(device->cdev, &pi433_fops);
 	retval = cdev_add(device->cdev, device->devt, 1);
-	if (retval)
-	{
+	if (retval) {
 		dev_dbg(device->dev, "register of cdev failed");
 		goto cdev_failed;
 	}

@@ -1306,15 +1254,13 @@ static int __init pi433_init(void)
 		return status;
 
 	pi433_class = class_create(THIS_MODULE, "pi433");
-	if (IS_ERR(pi433_class))
-	{
+	if (IS_ERR(pi433_class)) {
 		unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name);
 		return PTR_ERR(pi433_class);
 	}
 
 	status = spi_register_driver(&pi433_spi_driver);
-	if (status < 0)
-	{
+	if (status < 0) {
 		class_destroy(pi433_class);
 		unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name);
 	}