[PATCH] net: sgi: ioc3-eth: Fix return value check in ioc3eth_probe()

[Tang Bin]

In the function devm_platform_ioremap_resource(), if get resource
failed, the return value is ERR_PTR() not NULL. Thus it must be
replaced by IS_ERR(), or else it may result in crashes if a critical
error path is encountered.

Fixes: 0ce5ebd24d25 ("mfd: ioc3: Add driver for SGI IOC3 chip")
Signed-off-by: Zhang Shengju <zhangshen...@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tang...@cmss.chinamobile.com>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c 
b/drivers/net/ethernet/sgi/ioc3-eth.c
index db6b2988e..8021a3d34 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -865,17 +865,17 @@ static int ioc3eth_probe(struct platform_device *pdev)
        ip = netdev_priv(dev);
        ip->dma_dev = pdev->dev.parent;
        ip->regs = devm_platform_ioremap_resource(pdev, 0);
-       if (!ip->regs) {
-               err = -ENOMEM;
+       if (IS_ERR(ip->regs)) {
+               err = PTR_ERR(ip->regs);
                goto out_free;
        }
 
        ip->ssram = devm_platform_ioremap_resource(pdev, 1);
-       if (!ip->ssram) {
-               err = -ENOMEM;
+       if (IS_ERR(ip->ssram)) {
+               err = PTR_ERR(ip->ssram);
                goto out_free;
        }
-
+
        dev->irq = platform_get_irq(pdev, 0);
        if (dev->irq < 0) {
                err = dev->irq;
-- 
2.20.1.windows.1