[patch] net: moxa: fix an error code

[Dan Carpenter]

We accidentally return IS_ERR(priv->base) which is 1 instead of
PTR_ERR(priv->base) which is the error code.

Fixes: 6c821bd9edc9 ('net: Add MOXA ART SoCs ethernet driver')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/net/ethernet/moxa/moxart_ether.c 
b/drivers/net/ethernet/moxa/moxart_ether.c
index 00cfd95..3e67f45 100644
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -474,9 +474,9 @@ static int moxart_mac_probe(struct platform_device *pdev)
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        ndev->base_addr = res->start;
        priv->base = devm_ioremap_resource(p_dev, res);
-       ret = IS_ERR(priv->base);
-       if (ret) {
+       if (IS_ERR(priv->base)) {
                dev_err(p_dev, "devm_ioremap_resource failed\n");
+               ret = PTR_ERR(priv->base);
                goto init_fail;
        }