staging: comedi: ni_at_a2150: sample types are unsigned

Sample values in comedi are generally represented by unsigned values.
Change the type of the `dma_buffer` member of `struct a2150_private`
from `s16 *` to `uint16_t *`, and change the type of the `dpnt` variable
in `a2150_interrupt()` 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/ni_at_a2150.c b/drivers/staging/comedi/drivers/ni_at_a2150.c
index c77d343..63c8479 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_at_a2150.c
+++ b/drivers/staging/comedi/drivers/ni_at_a2150.c
@@ -154,7 +154,7 @@ struct a2150_private {
 
        volatile unsigned int count;    /* number of data points left to be taken */
        unsigned int dma;       /*  dma channel */
-       s16 *dma_buffer;        /*  dma buffer */
+       uint16_t *dma_buffer;   /*  dma buffer */
        unsigned int dma_transfer_size; /*  size in bytes of dma transfers */
        int irq_dma_bits;       /*  irq/dma register bits */
        int config_bits;        /*  config register bits */
@@ -192,7 +192,7 @@ static irqreturn_t a2150_interrupt(int irq, void *d)
        struct comedi_async *async;
        struct comedi_cmd *cmd;
        unsigned int max_points, num_points, residue, leftover;
-       short dpnt;
+       unsigned short dpnt;
        static const int sample_size = sizeof(devpriv->dma_buffer[0]);
 
        if (!dev->attached) {