diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index fdbdeae3900dd0bb92ea10184239d9bd6c004074..bb4e0a7c7b5eb0751aa2bb7528cc4b6af4ed7c8c 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -2130,28 +2130,13 @@ static int isp_map_mem_resource(struct platform_device *pdev,
 	/* request the mem region for the camera registers */
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
-	if (!mem) {
-		dev_err(isp->dev, "no mem resource?\n");
-		return -ENODEV;
-	}
-
-	if (!devm_request_mem_region(isp->dev, mem->start, resource_size(mem),
-				     pdev->name)) {
-		dev_err(isp->dev,
-			"cannot reserve camera register I/O region\n");
-		return -ENODEV;
-	}
-	isp->mmio_base_phys[res] = mem->start;
-	isp->mmio_size[res] = resource_size(mem);
 
 	/* map the region */
-	isp->mmio_base[res] = devm_ioremap_nocache(isp->dev,
-						   isp->mmio_base_phys[res],
-						   isp->mmio_size[res]);
-	if (!isp->mmio_base[res]) {
-		dev_err(isp->dev, "cannot map camera register I/O region\n");
-		return -ENODEV;
-	}
+	isp->mmio_base[res] = devm_ioremap_resource(isp->dev, mem);
+	if (IS_ERR(isp->mmio_base[res]))
+		return PTR_ERR(isp->mmio_base[res]);
+
+	isp->mmio_base_phys[res] = mem->start;
 
 	return 0;
 }
diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h
index d1e857e41731cf3b5c807ff0416ef117ee152ae5..72685ad0fc1ed6eb23f484ffd6d42a4758d9c302 100644
--- a/drivers/media/platform/omap3isp/isp.h
+++ b/drivers/media/platform/omap3isp/isp.h
@@ -152,7 +152,6 @@ struct isp_xclk {
  *             regions.
  * @mmio_base_phys: Array with physical L4 bus addresses for ISP register
  *                  regions.
- * @mmio_size: Array with ISP register regions size in bytes.
  * @stat_lock: Spinlock for handling statistics
  * @isp_mutex: Mutex for serializing requests to ISP.
  * @crashed: Bitmask of crashed entities (indexed by entity ID)
@@ -188,7 +187,6 @@ struct isp_device {
 
 	void __iomem *mmio_base[OMAP3_ISP_IOMEM_LAST];
 	unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
-	resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];
 
 	/* ISP Obj */
 	spinlock_t stat_lock;	/* common lock for statistic drivers */