staging: comedi: gsc_hpdi: tidy up comments

Use the usual style for block comments.  Squash double spaces after
comment opening sequence.  Move some comments after opening braces to
following line.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/gsc_hpdi.c

@@ -142,8 +142,10 @@ struct hpdi_private {
 	uint32_t *dio_buffer[NUM_DMA_BUFFERS];	/* dma buffers */
 	/* physical addresses of dma buffers */
 	dma_addr_t dio_buffer_phys_addr[NUM_DMA_BUFFERS];
-	/* array of dma descriptors read by plx9080, allocated to get proper
-	 * alignment */
+	/*
+	 * array of dma descriptors read by plx9080, allocated to get proper
+	 * alignment
+	 */
 	struct plx_dma_desc *dma_desc;
 	/* physical address of dma descriptor array */
 	dma_addr_t dma_desc_phys_addr;
@@ -226,7 +228,8 @@ static irqreturn_t gsc_hpdi_interrupt(int irq, void *d)
 	/* 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);
-	if (plx_status & ICS_DMA0_A) {	/*  dma chan 0 interrupt */
+	if (plx_status & ICS_DMA0_A) {
+		/* dma chan 0 interrupt */
 		writeb((dma0_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
 		       devpriv->plx9080_mmio + PLX_DMA0_CS_REG);
 
@@ -238,14 +241,16 @@ static irqreturn_t gsc_hpdi_interrupt(int irq, void *d)
 	/* spin lock makes sure no one else changes plx dma control reg */
 	spin_lock_irqsave(&dev->spinlock, flags);
 	dma1_status = readb(devpriv->plx9080_mmio + PLX_DMA1_CS_REG);
-	if (plx_status & ICS_DMA1_A) {	/*  XXX *//*  dma chan 1 interrupt */
+	if (plx_status & ICS_DMA1_A) {
+		/* XXX */ /* dma chan 1 interrupt */
 		writeb((dma1_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
 		       devpriv->plx9080_mmio + PLX_DMA1_CS_REG);
 	}
 	spin_unlock_irqrestore(&dev->spinlock, flags);
 
 	/* clear possible plx9080 interrupt sources */
-	if (plx_status & ICS_LDIA) {	/*  clear local doorbell interrupt */
+	if (plx_status & ICS_LDIA) {
+		/* clear local doorbell interrupt */
 		plx_bits = readl(devpriv->plx9080_mmio + PLX_DBR_OUT_REG);
 		writel(plx_bits, devpriv->plx9080_mmio + PLX_DBR_OUT_REG);
 	}
@@ -576,11 +581,15 @@ static void gsc_hpdi_init_plx9080(struct comedi_device *dev)
 	bits |= PLX_DMA_EN_READYIN_BIT;
 	/* enable dma chaining */
 	bits |= PLX_EN_CHAIN_BIT;
-	/*  enable interrupt on dma done
-	 *  (probably don't need this, since chain never finishes) */
+	/*
+	 * enable interrupt on dma done
+	 * (probably don't need this, since chain never finishes)
+	 */
 	bits |= PLX_EN_DMA_DONE_INTR_BIT;
-	/*  don't increment local address during transfers
-	 *  (we are transferring from a fixed fifo register) */
+	/*
+	 * don't increment local address during transfers
+	 * (we are transferring from a fixed fifo register)
+	 */
 	bits |= PLX_LOCAL_ADDR_CONST_BIT;
 	/* route dma interrupt to pci bus */
 	bits |= PLX_DMA_INTR_PCI_BIT;