[PATCH net-next] net: stmmac: Fix return value check in qcom_ethqos_probe()

[Wei Yongjun]

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

Fixes: a7c30e62d4b8 ("net: stmmac: Add driver for Qualcomm ethqos")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c 
b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 30724bd..7ec8954 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -473,8 +473,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
        ethqos->por = of_device_get_match_data(&pdev->dev);
 
        ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii");
-       if (!ethqos->rgmii_clk) {
-               ret = -ENOMEM;
+       if (IS_ERR(ethqos->rgmii_clk)) {
+               ret = PTR_ERR(ethqos->rgmii_clk);
                goto err_mem;
        }