[PATCH net-next] net: lantiq: Fix return value check in xrx200_probe()

[Wei Yongjun]

In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: fe1a56420cf2 ("net: lantiq: Add Lantiq / Intel VRX200 Ethernet driver")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/net/ethernet/lantiq_xrx200.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/lantiq_xrx200.c 
b/drivers/net/ethernet/lantiq_xrx200.c
index c8b6d90..4a16076 100644
--- a/drivers/net/ethernet/lantiq_xrx200.c
+++ b/drivers/net/ethernet/lantiq_xrx200.c
@@ -461,9 +461,9 @@ static int xrx200_probe(struct platform_device *pdev)
        }
 
        priv->pmac_reg = devm_ioremap_resource(dev, res);
-       if (!priv->pmac_reg) {
+       if (IS_ERR(priv->pmac_reg)) {
                dev_err(dev, "failed to request and remap io ranges\n");
-               return -ENOMEM;
+               return PTR_ERR(priv->pmac_reg);
        }
 
        priv->chan_rx.dma.irq = platform_get_irq_byname(pdev, "rx");