staging: comedi: gsc_hpdi: rename 'hpdi_iobase' in private data

This member in the private data holds the ioremaped PCI BAR2 address
which is the primary base address for the boards registers.

For aesthetics, rename this member simply 'mmio'.
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/gsc_hpdi.c

@@ -185,7 +185,7 @@ static const struct hpdi_board hpdi_boards[] = {
 
 struct hpdi_private {
 	void __iomem *plx9080_mmio;
-	void __iomem *hpdi_iobase;
+	void __iomem *mmio;
 	uint32_t *dio_buffer[NUM_DMA_BUFFERS];	/*  dma buffers */
 	/* physical addresses of dma buffers */
 	dma_addr_t dio_buffer_phys_addr[NUM_DMA_BUFFERS];
@@ -264,13 +264,12 @@ static irqreturn_t gsc_hpdi_interrupt(int irq, void *d)
 	if ((plx_status & (ICS_DMA0_A | ICS_DMA1_A | ICS_LIA)) == 0)
 		return IRQ_NONE;
 
-	hpdi_intr_status = readl(devpriv->hpdi_iobase + INTERRUPT_STATUS_REG);
-	hpdi_board_status = readl(devpriv->hpdi_iobase + BOARD_STATUS_REG);
+	hpdi_intr_status = readl(devpriv->mmio + INTERRUPT_STATUS_REG);
+	hpdi_board_status = readl(devpriv->mmio + BOARD_STATUS_REG);
+
+	if (hpdi_intr_status)
+		writel(hpdi_intr_status, devpriv->mmio + INTERRUPT_STATUS_REG);
 
-	if (hpdi_intr_status) {
-		writel(hpdi_intr_status,
-		       devpriv->hpdi_iobase + INTERRUPT_STATUS_REG);
-	}
 	/*  spin lock makes sure no one else changes plx dma control reg */
 	spin_lock_irqsave(&dev->spinlock, flags);
 	dma0_status = readb(devpriv->plx9080_mmio + PLX_DMA0_CS_REG);
@@ -334,8 +333,8 @@ static int gsc_hpdi_cancel(struct comedi_device *dev,
 {
 	struct hpdi_private *devpriv = dev->private;
 
-	writel(0, devpriv->hpdi_iobase + BOARD_CONTROL_REG);
-	writel(0, devpriv->hpdi_iobase + INTERRUPT_CONTROL_REG);
+	writel(0, devpriv->mmio + BOARD_CONTROL_REG);
+	writel(0, devpriv->mmio + INTERRUPT_CONTROL_REG);
 
 	gsc_hpdi_abort_dma(dev, 0);
 
@@ -354,7 +353,7 @@ static int gsc_hpdi_cmd(struct comedi_device *dev,
 	if (s->io_bits)
 		return -EINVAL;
 
-	writel(RX_FIFO_RESET_BIT, devpriv->hpdi_iobase + BOARD_CONTROL_REG);
+	writel(RX_FIFO_RESET_BIT, devpriv->mmio + BOARD_CONTROL_REG);
 
 	gsc_hpdi_abort_dma(dev, 0);
 
@@ -388,13 +387,12 @@ static int gsc_hpdi_cmd(struct comedi_device *dev,
 
 	/* clear over/under run status flags */
 	writel(RX_UNDERRUN_BIT | RX_OVERRUN_BIT,
-	       devpriv->hpdi_iobase + BOARD_STATUS_REG);
+	       devpriv->mmio + BOARD_STATUS_REG);
 
 	/* enable interrupts */
-	writel(intr_bit(RX_FULL_INTR),
-	       devpriv->hpdi_iobase + INTERRUPT_CONTROL_REG);
+	writel(intr_bit(RX_FULL_INTR), devpriv->mmio + INTERRUPT_CONTROL_REG);
 
-	writel(RX_ENABLE_BIT, devpriv->hpdi_iobase + BOARD_CONTROL_REG);
+	writel(RX_ENABLE_BIT, devpriv->mmio + BOARD_CONTROL_REG);
 
 	return 0;
 }
@@ -543,20 +541,20 @@ static int gsc_hpdi_init(struct comedi_device *dev)
 	struct hpdi_private *devpriv = dev->private;
 	uint32_t plx_intcsr_bits;
 
-	writel(BOARD_RESET_BIT, devpriv->hpdi_iobase + BOARD_CONTROL_REG);
+	writel(BOARD_RESET_BIT, devpriv->mmio + BOARD_CONTROL_REG);
 	udelay(10);
 
 	writel(almost_empty_bits(32) | almost_full_bits(32),
-	       devpriv->hpdi_iobase + RX_PROG_ALMOST_REG);
+	       devpriv->mmio + RX_PROG_ALMOST_REG);
 	writel(almost_empty_bits(32) | almost_full_bits(32),
-	       devpriv->hpdi_iobase + TX_PROG_ALMOST_REG);
+	       devpriv->mmio + TX_PROG_ALMOST_REG);
 
-	devpriv->tx_fifo_size = fifo_size(readl(devpriv->hpdi_iobase +
+	devpriv->tx_fifo_size = fifo_size(readl(devpriv->mmio +
 						  TX_FIFO_SIZE_REG));
-	devpriv->rx_fifo_size = fifo_size(readl(devpriv->hpdi_iobase +
+	devpriv->rx_fifo_size = fifo_size(readl(devpriv->mmio +
 						  RX_FIFO_SIZE_REG));
 
-	writel(0, devpriv->hpdi_iobase + INTERRUPT_CONTROL_REG);
+	writel(0, devpriv->mmio + INTERRUPT_CONTROL_REG);
 
 	/*  enable interrupts */
 	plx_intcsr_bits =
@@ -647,8 +645,8 @@ static int gsc_hpdi_auto_attach(struct comedi_device *dev,
 	pci_set_master(pcidev);
 
 	devpriv->plx9080_mmio = pci_ioremap_bar(pcidev, 0);
-	devpriv->hpdi_iobase = pci_ioremap_bar(pcidev, 2);
-	if (!devpriv->plx9080_mmio || !devpriv->hpdi_iobase) {
+	devpriv->mmio = pci_ioremap_bar(pcidev, 2);
+	if (!devpriv->plx9080_mmio || !devpriv->mmio) {
 		dev_warn(dev->class_dev, "failed to remap io memory\n");
 		return -ENOMEM;
 	}
@@ -722,8 +720,8 @@ static void gsc_hpdi_detach(struct comedi_device *dev)
 			writel(0, devpriv->plx9080_mmio + PLX_INTRCS_REG);
 			iounmap(devpriv->plx9080_mmio);
 		}
-		if (devpriv->hpdi_iobase)
-			iounmap(devpriv->hpdi_iobase);
+		if (devpriv->mmio)
+			iounmap(devpriv->mmio);
 		/*  free pci dma buffers */
 		for (i = 0; i < NUM_DMA_BUFFERS; i++) {
 			if (devpriv->dio_buffer[i])