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NFC: delete null dereference

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The exit label performs device_unlock(&dev->dev);, which will fail when dev
is NULL, and nfc_put_device(dev);, which is not useful when dev is NULL, so
just exit the function immediately.

Problem found using scripts/coccinelle/null/deref_null.cocci

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Julia Lawall 2015-10-17 11:32:19 +02:00 • committed by Samuel Ortiz
parent b43ef78145
commit 9abebb8a10
1 changed files with 2 additions and 4 deletions
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6
net/nfc/netlink.c
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@ -1109,10 +1109,8 @@ static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
dev = nfc_get_device(idx);
if (!dev) {
rc = -ENODEV;
goto exit;
}
if (!dev)
return -ENODEV;
device_lock(&dev->dev);