[PATCH] staging: pi433: fix check for FDEVMSB register mask

[Frederico Cadete]

The code was using the logical negation operator "!", effectively never
triggering the error path. To check the bitmask we should use the
bitwise negation "~".

Cleans up sparse warning:
  warning: dubious: x & !y

Signed-off-by: Frederico Cadete <freder...@cadete.eu>
---
 drivers/staging/pi433/rf69.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index f83523e3395d..e6332e1297ae 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -203,7 +203,7 @@ int rf69_set_deviation(struct spi_device *spi, u32 
deviation)
        lsb = (f_reg&0xff);
 
        // check msb
-       if (msb & !FDEVMASB_MASK)
+       if (msb & ~FDEVMASB_MASK)
        {
                dev_dbg(&spi->dev, "set_deviation: err in calc of msb");
                INVALID_PARAM;
-- 
2.14.1