[PATCH 1/1] staging: pi433: fix problem with division in rf69_set_deviation

[Marcus Wolf]

Fixes problem with division in rf69_set_deviation

Fixes: 874bcba65f9a ("staging: pi433: New driver")
Signed-off-by: Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx>

diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -221,7 +221,7 @@ int rf69_set_frequency(struct spi_device *spi, u32
frequency)
 int rf69_set_frequency(struct spi_device *spi, u32 frequency)
 {
 	int retval;
-	u32 f_max;
+	u64 f_max;
 	u64 f_reg;
 	u64 f_step;
 	u8 msb;
@@ -238,7 +238,8 @@ int rf69_set_frequency(struct spi_device *spi, u32
frequency)
 	do_div(f_step, 524288); //  524288 = 2^19
 
 	// check input value
-	f_max = f_step * 8388608 / factor;
+	f_max = f_step * 8388608;
+	do_div(f_max, factor);
 	if (frequency > f_max)
 	{
 		dev_dbg(&spi->dev, "setFrequency: illegal input param");