staging: pi433: pi433_if.c remove SET_CHECKED macro

The macro calls its argument -a function- twice, makes the calling
function return prematurely -skipping resource cleanup code- and hurts
understandability.
Signed-off-by: Nguyen Phan Quang Minh <minhnpq16@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/pi433/pi433_if.c

@@ -119,12 +119,6 @@ struct pi433_instance {
 	struct pi433_tx_cfg	tx_cfg;
 };
 
-/*-------------------------------------------------------------------------*/
-
-/* macro for checked access of registers of radio module */
-#define SET_CHECKED(retval) \
-	if (retval < 0) \
-		return retval;
 
 /*-------------------------------------------------------------------------*/
 
@@ -183,15 +177,33 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 	int payload_length;
 
 	/* receiver config */
-	SET_CHECKED(rf69_set_frequency	(dev->spi, rx_cfg->frequency));
-	SET_CHECKED(rf69_set_bit_rate	(dev->spi, rx_cfg->bit_rate));
-	SET_CHECKED(rf69_set_modulation	(dev->spi, rx_cfg->modulation));
-	SET_CHECKED(rf69_set_antenna_impedance	 (dev->spi, rx_cfg->antenna_impedance));
-	SET_CHECKED(rf69_set_rssi_threshold	 (dev->spi, rx_cfg->rssi_threshold));
-	SET_CHECKED(rf69_set_ook_threshold_dec	 (dev->spi, rx_cfg->threshold_decrement));
-	SET_CHECKED(rf69_set_bandwidth 		 (dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent));
-	SET_CHECKED(rf69_set_bandwidth_during_afc(dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent));
-	SET_CHECKED(rf69_set_dagc 		 (dev->spi, rx_cfg->dagc));
+	ret = rf69_set_frequency(dev->spi, rx_cfg->frequency);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_bit_rate(dev->spi, rx_cfg->bit_rate);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_modulation(dev->spi, rx_cfg->modulation);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_antenna_impedance(dev->spi, rx_cfg->antenna_impedance);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_rssi_threshold(dev->spi, rx_cfg->rssi_threshold);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_ook_threshold_dec(dev->spi, rx_cfg->threshold_decrement);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_bandwidth(dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_bandwidth_during_afc(dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_dagc(dev->spi, rx_cfg->dagc);
+	if (ret < 0)
+		return ret;
 
 	dev->rx_bytes_to_drop = rx_cfg->bytes_to_drop;
 
@@ -203,7 +215,9 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 		if (ret < 0)
 			return ret;
 
-		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, afterSyncInterrupt));
+		ret = rf69_set_fifo_fill_condition(dev->spi, afterSyncInterrupt);
+		if (ret < 0)
+			return ret;
 	}
 	else
 	{
@@ -211,7 +225,9 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 		if (ret < 0)
 			return ret;
 
-		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, always));
+		ret = rf69_set_fifo_fill_condition(dev->spi, always);
+		if (ret < 0)
+			return ret;
 	}
 	if (rx_cfg->enable_length_byte == OPTION_ON) {
 		ret = rf69_set_packet_format(dev->spi, packetLengthVar);
@@ -222,7 +238,9 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 		if (ret < 0)
 			return ret;
 	}
-	SET_CHECKED(rf69_set_adressFiltering(dev->spi, rx_cfg->enable_address_filtering));
+	ret = rf69_set_adressFiltering(dev->spi, rx_cfg->enable_address_filtering);
+	if (ret < 0)
+		return ret;
 
 	if (rx_cfg->enable_crc == OPTION_ON) {
 		ret = rf69_enable_crc(dev->spi);
@@ -235,32 +253,46 @@ 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));
+	ret = rf69_set_sync_size(dev->spi, rx_cfg->sync_length);
+	if (ret < 0)
+		return ret;
 	if (rx_cfg->enable_length_byte == OPTION_ON)
 	{
-		SET_CHECKED(rf69_set_payload_length(dev->spi, 0xff));
+		ret = rf69_set_payload_length(dev->spi, 0xff);
+		if (ret < 0)
+			return ret;
 	}
 	else if (rx_cfg->fixed_message_length != 0)
 	{
 		payload_length = rx_cfg->fixed_message_length;
 		if (rx_cfg->enable_length_byte  == OPTION_ON) payload_length++;
 		if (rx_cfg->enable_address_filtering != filteringOff) payload_length++;
-		SET_CHECKED(rf69_set_payload_length(dev->spi, payload_length));
+		ret = rf69_set_payload_length(dev->spi, payload_length);
+		if (ret < 0)
+			return ret;
 	}
 	else
 	{
-		SET_CHECKED(rf69_set_payload_length(dev->spi, 0));
+		ret = rf69_set_payload_length(dev->spi, 0);
+		if (ret < 0)
+			return ret;
 	}
 
 	/* values */
 	if (rx_cfg->enable_sync == OPTION_ON)
 	{
-		SET_CHECKED(rf69_set_sync_values(dev->spi, rx_cfg->sync_pattern));
+		ret = rf69_set_sync_values(dev->spi, rx_cfg->sync_pattern);
+		if (ret < 0)
+			return ret;
 	}
 	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));
+		ret = rf69_set_node_address(dev->spi, rx_cfg->node_address);
+		if (ret < 0)
+			return ret;
+		ret = rf69_set_broadcast_address(dev->spi, rx_cfg->broadcast_address);
+		if (ret < 0)
+			return ret;
 	}
 
 	return 0;
@@ -271,22 +303,40 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 {
 	int ret;
 
-	SET_CHECKED(rf69_set_frequency	(dev->spi, tx_cfg->frequency));
-	SET_CHECKED(rf69_set_bit_rate	(dev->spi, tx_cfg->bit_rate));
-	SET_CHECKED(rf69_set_modulation	(dev->spi, tx_cfg->modulation));
-	SET_CHECKED(rf69_set_deviation	(dev->spi, tx_cfg->dev_frequency));
-	SET_CHECKED(rf69_set_pa_ramp	(dev->spi, tx_cfg->pa_ramp));
-	SET_CHECKED(rf69_set_modulation_shaping(dev->spi, tx_cfg->mod_shaping));
-	SET_CHECKED(rf69_set_tx_start_condition(dev->spi, tx_cfg->tx_start_condition));
+	ret = rf69_set_frequency(dev->spi, tx_cfg->frequency);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_bit_rate(dev->spi, tx_cfg->bit_rate);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_modulation(dev->spi, tx_cfg->modulation);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_deviation(dev->spi, tx_cfg->dev_frequency);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_pa_ramp(dev->spi, tx_cfg->pa_ramp);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_modulation_shaping(dev->spi, tx_cfg->mod_shaping);
+	if (ret < 0)
+		return ret;
+	ret = rf69_set_tx_start_condition(dev->spi, tx_cfg->tx_start_condition);
+	if (ret < 0)
+		return ret;
 
 	/* packet format enable */
 	if (tx_cfg->enable_preamble == OPTION_ON)
 	{
-		SET_CHECKED(rf69_set_preamble_length(dev->spi, tx_cfg->preamble_length));
+		ret = rf69_set_preamble_length(dev->spi, tx_cfg->preamble_length);
+		if (ret < 0)
+			return ret;
 	}
 	else
 	{
-		SET_CHECKED(rf69_set_preamble_length(dev->spi, 0));
+		ret = rf69_set_preamble_length(dev->spi, 0);
+		if (ret < 0)
+			return ret;
 	}
 
 	if (tx_cfg->enable_sync == OPTION_ON) {
@@ -321,8 +371,12 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 
 	/* configure sync, if enabled */
 	if (tx_cfg->enable_sync == OPTION_ON) {
-		SET_CHECKED(rf69_set_sync_size(dev->spi, tx_cfg->sync_length));
-		SET_CHECKED(rf69_set_sync_values(dev->spi, tx_cfg->sync_pattern));
+		ret = rf69_set_sync_size(dev->spi, tx_cfg->sync_length);
+		if (ret < 0)
+			return ret;
+		ret = rf69_set_sync_values(dev->spi, tx_cfg->sync_pattern);
+		if (ret < 0)
+			return ret;
 	}
 
 	return 0;
@@ -344,18 +398,26 @@ pi433_start_rx(struct pi433_device *dev)
 	if (retval) return retval;
 
 	/* setup rssi irq */
-	SET_CHECKED(rf69_set_dio_mapping(dev->spi, DIO0, DIO_RSSI_DIO0));
+	retval = rf69_set_dio_mapping(dev->spi, DIO0, DIO_RSSI_DIO0);
+	if (retval < 0)
+		return retval;
 	dev->irq_state[DIO0] = DIO_RSSI_DIO0;
 	irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
 
 	/* setup fifo level interrupt */
-	SET_CHECKED(rf69_set_fifo_threshold(dev->spi, FIFO_SIZE - FIFO_THRESHOLD));
-	SET_CHECKED(rf69_set_dio_mapping(dev->spi, DIO1, DIO_FIFO_LEVEL));
+	retval = rf69_set_fifo_threshold(dev->spi, FIFO_SIZE - FIFO_THRESHOLD);
+	if (retval < 0)
+		return retval;
+	retval = rf69_set_dio_mapping(dev->spi, DIO1, DIO_FIFO_LEVEL);
+	if (retval < 0)
+		return retval;
 	dev->irq_state[DIO1] = DIO_FIFO_LEVEL;
 	irq_set_irq_type(dev->irq_num[DIO1], IRQ_TYPE_EDGE_RISING);
 
 	/* set module to receiving mode */
-	SET_CHECKED(rf69_set_mode(dev->spi, receive));
+	retval = rf69_set_mode(dev->spi, receive);
+	if (retval < 0)
+		return retval;
 
 	return 0;
 }
@@ -367,7 +429,7 @@ static int
 pi433_receive(void *data)
 {
 	struct pi433_device *dev = data;
-	struct spi_device *spi = dev->spi; /* needed for SET_CHECKED */
+	struct spi_device *spi = dev->spi;
 	int bytes_to_read, bytes_total;
 	int retval;
 
@@ -413,7 +475,9 @@ pi433_receive(void *data)
 	}
 
 	/* configure payload ready irq */
-	SET_CHECKED(rf69_set_dio_mapping(spi, DIO0, DIO_PAYLOAD_READY));
+	retval = rf69_set_dio_mapping(spi, DIO0, DIO_PAYLOAD_READY);
+	if (retval < 0)
+		goto abort;
 	dev->irq_state[DIO0] = DIO_PAYLOAD_READY;
 	irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
 
@@ -503,7 +567,8 @@ pi433_receive(void *data)
 	/* rx done, wait was interrupted or error occurred */
 abort:
 	dev->interrupt_rx_allowed = true;
-	SET_CHECKED(rf69_set_mode(dev->spi, standby));
+	if (rf69_set_mode(dev->spi, standby))
+		pr_err("rf69_set_mode(): radio module failed to go standby\n");
 	wake_up_interruptible(&dev->tx_wait_queue);
 
 	if (retval)
@@ -516,7 +581,7 @@ static int
 pi433_tx_thread(void *data)
 {
 	struct pi433_device *device = data;
-	struct spi_device *spi = device->spi; /* needed for SET_CHECKED */
+	struct spi_device *spi = device->spi;
 	struct pi433_tx_cfg tx_cfg;
 	u8     *buffer = device->buffer;
 	size_t size;
@@ -605,38 +670,56 @@ pi433_tx_thread(void *data)
 			/* rx is currently waiting for a telegram;
 			 * we need to set the radio module to standby
 			 */
-			SET_CHECKED(rf69_set_mode(device->spi, standby));
+			retval = rf69_set_mode(device->spi, standby);
+			if (retval < 0)
+				return retval;
 			rx_interrupted = true;
 		}
 
 		/* 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));
+		retval = rf69_set_mode(spi, standby); /* this clears the fifo */
+		if (retval < 0)
+			return retval;
+		retval = rf69_set_fifo_threshold(spi, FIFO_THRESHOLD);
+		if (retval < 0)
+			return retval;
 		if (tx_cfg.enable_length_byte == OPTION_ON)
 		{
-			SET_CHECKED(rf69_set_payload_length(spi, size * tx_cfg.repetitions));
+			retval = rf69_set_payload_length(spi, size * tx_cfg.repetitions);
+			if (retval < 0)
+				return retval;
 		}
 		else
 		{
-			SET_CHECKED(rf69_set_payload_length(spi, 0));
+			retval = rf69_set_payload_length(spi, 0);
+			if (retval < 0)
+				return retval;
 		}
 
 		/* configure the rf chip */
-		rf69_set_tx_cfg(device, &tx_cfg);
+		retval = rf69_set_tx_cfg(device, &tx_cfg);
+		if (retval < 0)
+			return retval;
 
 		/* enable fifo level interrupt */
-		SET_CHECKED(rf69_set_dio_mapping(spi, DIO1, DIO_FIFO_LEVEL));
+		retval = rf69_set_dio_mapping(spi, DIO1, DIO_FIFO_LEVEL);
+		if (retval < 0)
+			return retval;
 		device->irq_state[DIO1] = DIO_FIFO_LEVEL;
 		irq_set_irq_type(device->irq_num[DIO1], IRQ_TYPE_EDGE_FALLING);
 
 		/* enable packet sent interrupt */
-		SET_CHECKED(rf69_set_dio_mapping(spi, DIO0, DIO_PACKET_SENT));
+		retval = rf69_set_dio_mapping(spi, DIO0, DIO_PACKET_SENT);
+		if (retval < 0)
+			return retval;
 		device->irq_state[DIO0] = DIO_PACKET_SENT;
 		irq_set_irq_type(device->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
 		enable_irq(device->irq_num[DIO0]); /* was disabled by rx active check */
 
 		/* enable transmission */
-		SET_CHECKED(rf69_set_mode(spi, transmit));
+		retval = rf69_set_mode(spi, transmit);
+		if (retval < 0)
+			return retval;
 
 		/* transfer this msg (and repetitions) to chip fifo */
 		device->free_in_fifo = FIFO_SIZE;
@@ -678,7 +761,9 @@ pi433_tx_thread(void *data)
 
 		/* STOP_TRANSMISSION */
 		dev_dbg(device->dev, "thread: Packet sent. Set mode to stby.");
-		SET_CHECKED(rf69_set_mode(spi, standby));
+		retval = rf69_set_mode(spi, standby);
+		if (retval < 0)
+			return retval;
 
 		/* everything sent? */
 		if (kfifo_is_empty(&device->tx_fifo)) {