From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sun, 6 Oct 2019 16:52:43 +0000 (+0200)
Subject: net: core: use helper skb_ensure_writable in more places
X-Git-Tag: v5.5-rc1~174^2~398
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8211fbfaf2fe66ac4ca28bb52b4e7f61dcac0378;p=linux.git

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>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 944de67ee95d..7d05e042c6ba 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -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));