net: ll_temac: Fix return value check in temac_probe()

In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xilinx/ll_temac_main.c

@@ -1410,9 +1410,9 @@ static int temac_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	lp->regs = devm_ioremap(&pdev->dev, res->start,
 					resource_size(res));
-	if (IS_ERR(lp->regs)) {
+	if (!lp->regs) {
 		dev_err(&pdev->dev, "could not map TEMAC registers\n");
-		return PTR_ERR(lp->regs);
+		return -ENOMEM;
 	}
 
 	/* Select register access functions with the specified
@@ -1505,10 +1505,10 @@ static int temac_probe(struct platform_device *pdev)
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 		lp->sdma_regs = devm_ioremap(&pdev->dev, res->start,
 						     resource_size(res));
-		if (IS_ERR(lp->sdma_regs)) {
+		if (!lp->sdma_regs) {
 			dev_err(&pdev->dev,
 				"could not map DMA registers\n");
-			return PTR_ERR(lp->sdma_regs);
+			return -ENOMEM;
 		}
 		if (pdata->dma_little_endian) {
 			lp->dma_in = temac_dma_in32_le;