[PATCH] Staging: pi433: fix some warnings detected using sparse

[Elia Geretto]

This patch corrects some visibility issues regarding some functions and
solves a warning related to a non-matching union. After this patch,
sparse produces only one other warning regarding a bitwise operator;
however, this behaviour seems to be intended.

Signed-off-by: Elia Geretto <elia.f.geretto@xxxxxxxxx>
---
 drivers/staging/pi433/pi433_if.c | 17 +++++++++++------
 drivers/staging/pi433/rf69.c     |  4 +++-
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index d9328ce5ec1d..f8219a53ce60 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -208,7 +208,10 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 	{
 		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, always));
 	}
-	SET_CHECKED(rf69_set_packet_format  (dev->spi, rx_cfg->enable_length_byte));
+	if (rx_cfg->enable_length_byte == optionOn)
+		SET_CHECKED(rf69_set_packet_format(dev->spi, packetLengthVar));
+	else
+		SET_CHECKED(rf69_set_packet_format(dev->spi, packetLengthFix));
 	SET_CHECKED(rf69_set_adressFiltering(dev->spi, rx_cfg->enable_address_filtering));
 	SET_CHECKED(rf69_set_crc_enable	    (dev->spi, rx_cfg->enable_crc));
 
@@ -264,8 +267,11 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 	{
 		SET_CHECKED(rf69_set_preamble_length(dev->spi, 0));
 	}
+	if (tx_cfg->enable_length_byte == optionOn)
+		SET_CHECKED(rf69_set_packet_format(dev->spi, packetLengthVar));
+	else
+		SET_CHECKED(rf69_set_packet_format(dev->spi, packetLengthFix));
 	SET_CHECKED(rf69_set_sync_enable  (dev->spi, tx_cfg->enable_sync));
-	SET_CHECKED(rf69_set_packet_format(dev->spi, tx_cfg->enable_length_byte));
 	SET_CHECKED(rf69_set_crc_enable	  (dev->spi, tx_cfg->enable_crc));
 
 	/* configure sync, if enabled */
@@ -313,7 +319,7 @@ pi433_start_rx(struct pi433_device *dev)
 
 /*-------------------------------------------------------------------------*/
 
-int
+static int
 pi433_receive(void *data)
 {
 	struct pi433_device *dev = data;
@@ -463,7 +469,7 @@ pi433_receive(void *data)
 		return bytes_total;
 }
 
-int
+static int
 pi433_tx_thread(void *data)
 {
 	struct pi433_device *device = data;
@@ -1152,8 +1158,7 @@ static int pi433_probe(struct spi_device *spi)
 	device->tx_task_struct = kthread_run(pi433_tx_thread,
 					     device,
 					     "pi433_tx_task");
-	if (device->tx_task_struct < 0)
-	{
+	if (IS_ERR(device->tx_task_struct)) {
 		dev_dbg(device->dev, "start of send thread failed");
 		goto send_thread_failed;
 	}
diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index e391ce777bc7..52521fa18c9b 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -433,7 +433,9 @@ int rf69_set_dc_cut_off_frequency_during_afc(struct spi_device *spi, enum dccPer
 	return rf69_set_dc_cut_off_frequency_intern(spi, REG_AFCBW, dccPercent);
 }
 
-int rf69_set_bandwidth_intern(struct spi_device *spi, u8 reg, enum mantisse mantisse, u8 exponent)
+static int
+rf69_set_bandwidth_intern(struct spi_device *spi, u8 reg,
+			  enum mantisse mantisse, u8 exponent)
 {
 	u8 newValue;
 
-- 
2.13.3