crypto: mv_cesa - request registers memory region

The mv_cesa driver does not request the CESA registers memory region.
Since we're about to add a new CESA driver, we need to make sure only one
of these drivers probe the CESA device, and requesting the registers memory
region is a good way to achieve that.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/mv_cesa.c

@@ -1041,23 +1041,23 @@ static int mv_probe(struct platform_device *pdev)
 
 	spin_lock_init(&cp->lock);
 	crypto_init_queue(&cp->queue, 50);
-	cp->reg = ioremap(res->start, resource_size(res));
-	if (!cp->reg) {
-		ret = -ENOMEM;
+	cp->reg = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(cp->reg)) {
+		ret = PTR_ERR(cp->reg);
 		goto err;
 	}
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
 	if (!res) {
 		ret = -ENXIO;
-		goto err_unmap_reg;
+		goto err;
 	}
 	cp->sram_size = resource_size(res);
 	cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE;
 	cp->sram = ioremap(res->start, cp->sram_size);
 	if (!cp->sram) {
 		ret = -ENOMEM;
-		goto err_unmap_reg;
+		goto err;
 	}
 
 	if (pdev->dev.of_node)
@@ -1136,8 +1136,6 @@ static int mv_probe(struct platform_device *pdev)
 	kthread_stop(cp->queue_th);
 err_unmap_sram:
 	iounmap(cp->sram);
-err_unmap_reg:
-	iounmap(cp->reg);
 err:
 	kfree(cp);
 	cpg = NULL;
@@ -1158,7 +1156,6 @@ static int mv_remove(struct platform_device *pdev)
 	free_irq(cp->irq, cp);
 	memset(cp->sram, 0, cp->sram_size);
 	iounmap(cp->sram);
-	iounmap(cp->reg);
 
 	if (!IS_ERR(cp->clk)) {
 		clk_disable_unprepare(cp->clk);