staging: comedi: adl_pci9118: sample types are unsigned

Sample values in comedi are generally represented as unsigned values.
Change the `ao_data[]` and `dmabuf_virt[]` members of `struct
pci9118_private` and various local variables dealing with sample values
to use `unsigned short` instead of `short` for consistency.

Also remove the `short *ai_data` member of `struct pci9118_private` as
it is only assigned to.

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/adl_pci9118.c b/drivers/staging/comedi/drivers/adl_pci9118.c
index bd5c8bb..0f2e859 100644 (file)
--- a/drivers/staging/comedi/drivers/adl_pci9118.c
+++ b/drivers/staging/comedi/drivers/adl_pci9118.c
@@ -352,12 +352,11 @@ struct pci9118_private {
                                                 * on external start
                                                 */
        unsigned int ai_data_len;
-       short *ai_data;
-       short ao_data[2];                       /* data output buffer */
+       unsigned short ao_data[2];              /* data output buffer */
        unsigned int ai_scans;                  /* number of scans to do */
        char dma_doublebuf;                     /* we can use double buffering */
        unsigned int dma_actbuf;                /* which buffer is used now */
-       short *dmabuf_virt[2];                  /*
+       unsigned short *dmabuf_virt[2];                 /*
                                                 * pointers to begin of
                                                 * DMA buffer
                                                 */
@@ -700,7 +699,7 @@ static void interrupt_pci9118_ai_mode4_switch(struct comedi_device *dev)
 
 static unsigned int defragment_dma_buffer(struct comedi_device *dev,
                                          struct comedi_subdevice *s,
-                                         short *dma_buffer,
+                                         unsigned short *dma_buffer,
                                          unsigned int num_samples)
 {
        struct pci9118_private *devpriv = dev->private;
@@ -724,7 +723,7 @@ static unsigned int defragment_dma_buffer(struct comedi_device *dev,
 
 static int move_block_from_dma(struct comedi_device *dev,
                                        struct comedi_subdevice *s,
-                                       short *dma_buffer,
+                                       unsigned short *dma_buffer,
                                        unsigned int num_samples)
 {
        struct pci9118_private *devpriv = dev->private;
@@ -925,7 +924,7 @@ static void pci9118_ai_munge(struct comedi_device *dev,
 {
        struct pci9118_private *devpriv = dev->private;
        unsigned int i, num_samples = num_bytes / sizeof(short);
-       short *array = data;
+       unsigned short *array = data;
 
        for (i = 0; i < num_samples; i++) {
                if (devpriv->usedma)
@@ -945,7 +944,7 @@ static void interrupt_pci9118_ai_onesample(struct comedi_device *dev,
                                           unsigned short int_daq)
 {
        struct pci9118_private *devpriv = dev->private;
-       register short sampl;
+       unsigned short sampl;
 
        s->async->events = 0;
 
@@ -1613,7 +1612,6 @@ static int pci9118_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        devpriv->ai_n_chan = cmd->chanlist_len;
        devpriv->ai_n_scanlen = cmd->scan_end_arg;
        devpriv->ai_chanlist = cmd->chanlist;
-       devpriv->ai_data = s->async->prealloc_buf;
        devpriv->ai_data_len = s->async->prealloc_bufsz;
        devpriv->ai_timer1 = 0;
        devpriv->ai_timer2 = 0;
@@ -1987,8 +1985,8 @@ static int pci9118_common_attach(struct comedi_device *dev, int disable_irq,
                for (i = 0; i < 2; i++) {
                        for (pages = 4; pages >= 0; pages--) {
                                devpriv->dmabuf_virt[i] =
-                                   (short *)__get_free_pages(GFP_KERNEL,
-                                                             pages);
+                                   (unsigned short *)
+                                   __get_free_pages(GFP_KERNEL, pages);
                                if (devpriv->dmabuf_virt[i])
                                        break;
                        }