staging: comedi: hwdrv_apci3120: use sample manipulation helpers

Use the recently added sample manipulation helpers to remove the hardcoded
assumption of the sample size.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
index facd2c4..9170766 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
@@ -947,7 +947,9 @@ static int apci3120_cyclic_ai(int mode,
                /* If DMA Enabled */
                struct apci3120_dmabuf *dmabuf0 = &devpriv->dmabuf[0];
                struct apci3120_dmabuf *dmabuf1 = &devpriv->dmabuf[1];
-               unsigned int scan_bytes = cmd->scan_end_arg * sizeof(short);
+               unsigned int scan_bytes;
+
+               scan_bytes = comedi_samples_to_bytes(s, cmd->scan_end_arg);
 
                devpriv->b_InterruptMode = APCI3120_DMA_MODE;