[ Upstream commit 35cba15a504bf4f585bb9d78f47b22b28a1a06b2 ]

Use devm_platform_get_and_ioremap_resource() to simplify code and avoid a null-ptr-deref by checking 'res' in it.

[yyl: since devm_platform_get_and_ioremap_resource() is introduced in linux-5.7, so just check the return value after calling platform_get_resource()]

Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: David S. Miller davem@davemloft.net --- drivers/net/ethernet/moxa/moxart_ether.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c index f70bb81e1ed65..caf7051302725 100644 --- a/drivers/net/ethernet/moxa/moxart_ether.c +++ b/drivers/net/ethernet/moxa/moxart_ether.c @@ -481,6 +481,10 @@ static int moxart_mac_probe(struct platform_device *pdev) priv->pdev = pdev;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -EINVAL; + goto init_fail; + } ndev->base_addr = res->start; priv->base = devm_ioremap_resource(p_dev, res); if (IS_ERR(priv->base)) {