staging: comedi: das16m1: sample types are unsigned

Sample values in comedi are generally represented as unsigned values.
Change the element type of the `ai_buffer[]` member of `struct
das16m1_private_struct` and the types used by `munge_sample()` and
`munge_sample_array()` from `short` to `unsigned short` for consistency.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c
index 579b74e471d907528d84e3742787d9cdebd0a73b..fce9acfe8084596d8c6f9b5c522c276a9ac0dd24 100644 (file)
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -131,18 +131,18 @@ struct das16m1_private_struct {
         * needed to keep track of whether new count has been loaded into
         * counter yet (loaded by first sample conversion) */
        u16 initial_hw_count;
-       short ai_buffer[FIFO_SIZE];
+       unsigned short ai_buffer[FIFO_SIZE];
        unsigned int divisor1;  /*  divides master clock to obtain conversion speed */
        unsigned int divisor2;  /*  divides master clock to obtain conversion speed */
        unsigned long extra_iobase;
 };
 
-static inline short munge_sample(short data)
+static inline unsigned short munge_sample(unsigned short data)
 {
        return (data >> 4) & 0xfff;
 }
 
-static void munge_sample_array(short *array, unsigned int num_elements)
+static void munge_sample_array(unsigned short *array, unsigned int num_elements)
 {
        unsigned int i;