staging: comedi: addi_apci_3120: rename private data 'b_DmaDoubleBuffer'

Rename this CamelCase member of the private data and convert it to
a bit-field.
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>

drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c

@@ -360,7 +360,7 @@ static void apci3120_interrupt_dma(int irq, void *d)
 	}
 	samplesinbuf = samplesinbuf >> 1;	/*  number of received samples */
 
-	if (devpriv->b_DmaDoubleBuffer) {
+	if (devpriv->use_double_buffer) {
 		struct apci3120_dmabuf *next_dmabuf;
 
 		next_dmabuf = &devpriv->dmabuf[1 - devpriv->ui_DmaActualBuffer];
@@ -381,7 +381,7 @@ static void apci3120_interrupt_dma(int irq, void *d)
 		return;
 	}
 
-	if (devpriv->b_DmaDoubleBuffer) {
+	if (devpriv->use_double_buffer) {
 		/* switch dma buffers for next interrupt */
 		devpriv->ui_DmaActualBuffer = 1 - devpriv->ui_DmaActualBuffer;
 	} else {

drivers/staging/comedi/drivers/addi_apci_3120.c

@@ -130,7 +130,7 @@ struct apci3120_private {
 	unsigned long addon;
 	unsigned int osc_base;
 	unsigned int use_dma:1;
-	unsigned char b_DmaDoubleBuffer;
+	unsigned int use_double_buffer:1;
 	unsigned int ui_DmaActualBuffer;
 	struct apci3120_dmabuf dmabuf[2];
 	unsigned char do_bits;
@@ -469,7 +469,7 @@ static void apci3120_dma_alloc(struct comedi_device *dev)
 		if (i == 0)
 			devpriv->use_dma = 1;
 		if (i == 1)
-			devpriv->b_DmaDoubleBuffer = 1;
+			devpriv->use_double_buffer = 1;
 	}
 }