iio:adc:ad7923: Put macro argument between ()'s

Put macro argument between parenthesis in order to avoid precedence
issues. Solves the following checkpath.pl's messages:

CHECK: Macro argument 'mode' may be better as '(mode)' to avoid
precedence issues
CHECK: Macro argument 'channel' may be better as '(channel)' to
avoid precedence issues
CHECK: Macro argument reuse 'sequence' - possible side-effects?
CHECK: Macro argument 'sequence' may be better as '(sequence)' to
avoid precedence issues
CHECK: Macro argument 'val' may be better as '(val)' to avoid
precedence issues
CHECK: Macro argument 'dec' may be better as '(dec)' to avoid precedence
issues
CHECK: Macro argument 'bits' may be better as '(bits)' to avoid
precedence issues

Signed-off-by: Bárbara Fernandes <barbara.fernandes@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index b39ea83..dbece44 100644 (file)
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -40,16 +40,16 @@
 
 #define AD7923_MAX_CHAN                4
 
-#define AD7923_PM_MODE_WRITE(mode)     (mode << 4)     /* write mode */
-#define AD7923_CHANNEL_WRITE(channel)  (channel << 6)  /* write channel */
-#define AD7923_SEQUENCE_WRITE(sequence)        (((sequence & 1) << 3) \
-                                       + ((sequence & 2) << 9))
+#define AD7923_PM_MODE_WRITE(mode)     ((mode) << 4)    /* write mode */
+#define AD7923_CHANNEL_WRITE(channel)  ((channel) << 6) /* write channel */
+#define AD7923_SEQUENCE_WRITE(sequence)        ((((sequence) & 1) << 3) \
+                                       + (((sequence) & 2) << 9))
                                                /* write sequence fonction */
 /* left shift for CR : bit 11 transmit in first */
 #define AD7923_SHIFT_REGISTER  4
 
 /* val = value, dec = left shift, bits = number of bits of the mask */
-#define EXTRACT(val, dec, bits)                ((val >> dec) & ((1 << bits) - 1))
+#define EXTRACT(val, dec, bits)                (((val) >> (dec)) & ((1 << (bits)) - 1))
 
 struct ad7923_state {
        struct spi_device               *spi;