net: eth: xgene: devm_ioremap() returns NULL on error

devm_ioremap() returns NULL on failure, it doesn't return an ERR_PTR.

Fixes: de7b5b3d ('net: eth: xgene: change APM X-Gene SoC platform ethernet to support ACPI')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NIyappan Subramanian <isubramanian@apm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/apm/xgene/xgene_enet_main.c

@@ -804,9 +804,9 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 		return -ENODEV;
 	}
 	pdata->base_addr = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(pdata->base_addr)) {
+	if (!pdata->base_addr) {
 		dev_err(dev, "Unable to retrieve ENET Port CSR region\n");
-		return PTR_ERR(pdata->base_addr);
+		return -ENOMEM;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CSR);
@@ -816,9 +816,9 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	}
 	pdata->ring_csr_addr = devm_ioremap(dev, res->start,
 							resource_size(res));
-	if (IS_ERR(pdata->ring_csr_addr)) {
+	if (!pdata->ring_csr_addr) {
 		dev_err(dev, "Unable to retrieve ENET Ring CSR region\n");
-		return PTR_ERR(pdata->ring_csr_addr);
+		return -ENOMEM;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CMD);
@@ -828,9 +828,9 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	}
 	pdata->ring_cmd_addr = devm_ioremap(dev, res->start,
 							resource_size(res));
-	if (IS_ERR(pdata->ring_cmd_addr)) {
+	if (!pdata->ring_cmd_addr) {
 		dev_err(dev, "Unable to retrieve ENET Ring command region\n");
-		return PTR_ERR(pdata->ring_cmd_addr);
+		return -ENOMEM;
 	}
 
 	ret = platform_get_irq(pdev, 0);