staging: comedi: pcl816: sample types are unsigned

Sample values in comedi are generally represented as unsigned values.
Change the "pcl816" module to use unsigned types to handle samples 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/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c
index 2fd9b17..ab9d2bd 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl816.c
+++ b/drivers/staging/comedi/drivers/pcl816.c
@@ -229,7 +229,7 @@ static irqreturn_t interrupt_pcl816_ai_mode13_int(int irq, void *d)
        struct comedi_device *dev = d;
        struct pcl816_private *devpriv = dev->private;
        struct comedi_subdevice *s = &dev->subdevices[0];
-       int low, hi;
+       unsigned char low, hi;
        int timeout = 50;       /* wait max 50us */
 
        while (timeout--) {
@@ -281,7 +281,8 @@ static irqreturn_t interrupt_pcl816_ai_mode13_int(int irq, void *d)
    analog input dma mode 1 & 3, 816 cards
 */
 static void transfer_from_dma_buf(struct comedi_device *dev,
-                                 struct comedi_subdevice *s, short *ptr,
+                                 struct comedi_subdevice *s,
+                                 unsigned short *ptr,
                                  unsigned int bufptr, unsigned int len)
 {
        struct pcl816_private *devpriv = dev->private;
@@ -324,7 +325,7 @@ static irqreturn_t interrupt_pcl816_ai_mode13_dma(int irq, void *d)
        struct comedi_subdevice *s = &dev->subdevices[0];
        int len, bufptr, this_dma_buf;
        unsigned long dma_flags;
-       short *ptr;
+       unsigned short *ptr;
 
        disable_dma(devpriv->dma);
        this_dma_buf = devpriv->next_dma_buf;
@@ -352,7 +353,7 @@ static irqreturn_t interrupt_pcl816_ai_mode13_dma(int irq, void *d)
        devpriv->dma_runs_to_end--;
        outb(0, dev->iobase + PCL816_CLRINT);   /* clear INT request */
 
-       ptr = (short *)devpriv->dmabuf[this_dma_buf];
+       ptr = (unsigned short *)devpriv->dmabuf[this_dma_buf];
 
        len = (devpriv->hwdmasize[0] >> 1) - devpriv->ai_poll_ptr;
        bufptr = devpriv->ai_poll_ptr;
@@ -665,7 +666,8 @@ static int pcl816_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s)
        }
 
        transfer_from_dma_buf(dev, s,
-                             (short *)devpriv->dmabuf[devpriv->next_dma_buf],
+                             (unsigned short *)devpriv->dmabuf[devpriv->
+                                                               next_dma_buf],
                              devpriv->ai_poll_ptr, top2);
 
        devpriv->ai_poll_ptr = top1;    /*  new buffer position */