[PATCH -next] phy: sparx5_serdes: Fix return value check in sparx5_serdes_probe()

['w00385741]

From: Wei Yongjun <weiyongj...@huawei.com>

In case of error, the function devm_ioremap() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value
check should be replaced with NULL test.

Fixes: 2ff8a1eeb5aa ("phy: Add Sparx5 ethernet serdes PHY driver")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/phy/microchip/sparx5_serdes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/microchip/sparx5_serdes.c 
b/drivers/phy/microchip/sparx5_serdes.c
index 06bcf0c166cf..dd854d825000 100644
--- a/drivers/phy/microchip/sparx5_serdes.c
+++ b/drivers/phy/microchip/sparx5_serdes.c
@@ -2438,10 +2438,10 @@ static int sparx5_serdes_probe(struct platform_device 
*pdev)
 
        iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        iomem = devm_ioremap(priv->dev, iores->start, iores->end - iores->start 
+ 1);
-       if (IS_ERR(iomem)) {
+       if (!iomem) {
                dev_err(priv->dev, "Unable to get serdes registers: %s\n",
                        iores->name);
-               return PTR_ERR(iomem);
+               return -ENOMEM;
        }
        for (idx = 0; idx < ARRAY_SIZE(sparx5_serdes_iomap); idx++) {
                struct sparx5_serdes_io_resource *iomap = 
&sparx5_serdes_iomap[idx];