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net: core: use helper skb_ensure_writable in more places 

Use helper skb_ensure_writable in two more places to simplify the code.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-10-06 18:52:43 +02:00 committed by David S. Miller
parent 3289086210
commit 8211fbfaf2
1 changed files with 8 additions and 12 deletions
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20
net/core/dev.c
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@ -3165,12 +3165,9 @@ int skb_checksum_help(struct sk_buff *skb)
offset += skb->csum_offset;
BUG_ON(offset + sizeof(__sum16) > skb_headlen(skb));
if (skb_cloned(skb) &&
!skb_clone_writable(skb, offset + sizeof(__sum16))) {
ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (ret)
goto out;
}
ret = skb_ensure_writable(skb, offset + sizeof(__sum16));
if (ret)
goto out;
*(__sum16 *)(skb->data + offset) = csum_fold(csum) ?: CSUM_MANGLED_0;
out_set_summed:
@ -3205,12 +3202,11 @@ int skb_crc32c_csum_help(struct sk_buff *skb)
ret = -EINVAL;
goto out;
}
if (skb_cloned(skb) &&
!skb_clone_writable(skb, offset + sizeof(__le32))) {
ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (ret)
goto out;
}
ret = skb_ensure_writable(skb, offset + sizeof(__le32));
if (ret)
goto out;
crc32c_csum = cpu_to_le32(~__skb_checksum(skb, start,
skb->len - start, ~(__u32)0,
crc32c_csum_stub));