DMA-API: media: omap3isp: use dma_coerce_mask_and_coherent()

The code sequence:
	isp->raw_dmamask = DMA_BIT_MASK(32);
	isp->dev->dma_mask = &isp->raw_dmamask;
	isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
bypasses the architectures check on the DMA mask.  It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/media/platform/omap3isp/isp.c

@@ -2182,9 +2182,9 @@ static int isp_probe(struct platform_device *pdev)
 	isp->pdata = pdata;
 	isp->ref_count = 0;
 
-	isp->raw_dmamask = DMA_BIT_MASK(32);
-	isp->dev->dma_mask = &isp->raw_dmamask;
-	isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+	ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
 
 	platform_set_drvdata(pdev, isp);
 

drivers/media/platform/omap3isp/isp.h

@@ -152,7 +152,6 @@ struct isp_xclk {
  * @mmio_base_phys: Array with physical L4 bus addresses for ISP register
  *                  regions.
  * @mmio_size: Array with ISP register regions size in bytes.
- * @raw_dmamask: Raw DMA mask
  * @stat_lock: Spinlock for handling statistics
  * @isp_mutex: Mutex for serializing requests to ISP.
  * @crashed: Bitmask of crashed entities (indexed by entity ID)
@@ -190,8 +189,6 @@ struct isp_device {
 	unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
 	resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];
 
-	u64 raw_dmamask;
-
 	/* ISP Obj */
 	spinlock_t stat_lock;	/* common lock for statistic drivers */
 	struct mutex isp_mutex;	/* For handling ref_count field */