net: macb: Fix passing zero to 'PTR_ERR'

Check PTR_ERR with IS_ERR to fix this.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20201112144936.54776-1-yuehaibing@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 51f8662..7b1d195 100644 (file)
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3711,19 +3711,13 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
        }
 
        if (IS_ERR_OR_NULL(*pclk)) {
-               err = PTR_ERR(*pclk);
-               if (!err)
-                       err = -ENODEV;
-
+               err = IS_ERR(*pclk) ? PTR_ERR(*pclk) : -ENODEV;
                dev_err(&pdev->dev, "failed to get macb_clk (%d)\n", err);
                return err;
        }
 
        if (IS_ERR_OR_NULL(*hclk)) {
-               err = PTR_ERR(*hclk);
-               if (!err)
-                       err = -ENODEV;
-
+               err = IS_ERR(*hclk) ? PTR_ERR(*hclk) : -ENODEV;
                dev_err(&pdev->dev, "failed to get hclk (%d)\n", err);
                return err;
        }