mtd: nand: pxa3xx: Allow devices with no dma resources

When use_dma=0 there's no point in requesting resources for dma,
since they won't be used anyway. Therefore we remove that requirement,
therefore allowing devices without dma to pass the driver probe.
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/pxa3xx_nand.c

@@ -1141,18 +1141,21 @@ static int alloc_nand_resource(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	if (use_dma) {
 		/*
-	 * This is a dirty hack to make this driver work from devicetree
-	 * bindings. It can be removed once we have a prober DMA controller
-	 * framework for DT.
+		 * This is a dirty hack to make this driver work from
+		 * devicetree bindings. It can be removed once we have
+		 * a prober DMA controller framework for DT.
 		 */
-	if (pdev->dev.of_node && of_machine_is_compatible("marvell,pxa3xx")) {
+		if (pdev->dev.of_node &&
+		    of_machine_is_compatible("marvell,pxa3xx")) {
 			info->drcmr_dat = 97;
 			info->drcmr_cmd = 99;
 		} else {
 			r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 			if (r == NULL) {
-			dev_err(&pdev->dev, "no resource defined for data DMA\n");
+				dev_err(&pdev->dev,
+					"no resource defined for data DMA\n");
 				ret = -ENXIO;
 				goto fail_disable_clk;
 			}
@@ -1160,12 +1163,14 @@ static int alloc_nand_resource(struct platform_device *pdev)
 
 			r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 			if (r == NULL) {
-			dev_err(&pdev->dev, "no resource defined for command DMA\n");
+				dev_err(&pdev->dev,
+					"no resource defined for cmd DMA\n");
 				ret = -ENXIO;
 				goto fail_disable_clk;
 			}
 			info->drcmr_cmd = r->start;
 		}
+	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {