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net: moxa: Use devm_platform_get_and_ioremap_resource()

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commit 35cba15a504bf4f585bb9d78f47b22b28a1a06b2 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yang Yingliang 2021-06-07 23:02:59 +08:00 • committed by Greg Kroah-Hartman
commit 249e0ab80c
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/moxa/moxart_ether.c
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@ -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)) {