linux-kernel - [PATCH] netfilter: use PTR_ERR_OR

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Date:   Thu, 19 Jul 2018 21:20:09 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <pablo@...filter.org>, <kadlec@...ckhole.kfki.hu>, <fw@...len.de>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <davem@...emloft.net>, <netfilter-devel@...r.kernel.org>,
        <coreteam@...filter.org>, YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH] netfilter: use PTR_ERR_OR_ZERO()

Fix ptr_ret.cocci warnings:

  net/netfilter/xt_connlimit.c:96:1-3: WARNING: PTR_ERR_OR_ZERO can be used
  net/netfilter/nft_numgen.c:240:1-3: WARNING: PTR_ERR_OR_ZERO can be used

Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 net/netfilter/nft_numgen.c   | 4 +---
 net/netfilter/xt_connlimit.c | 4 +---
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/net/netfilter/nft_numgen.c b/net/netfilter/nft_numgen.c
index 1f4d085..649d170 100644
--- a/net/netfilter/nft_numgen.c
+++ b/net/netfilter/nft_numgen.c
@@ -237,10 +237,8 @@ static int nft_ng_random_map_init(const struct nft_ctx *ctx,
 	priv->map = nft_set_lookup_global(ctx->net, ctx->table,
 					  tb[NFTA_NG_SET_NAME],
 					  tb[NFTA_NG_SET_ID], genmask);
-	if (IS_ERR(priv->map))
-		return PTR_ERR(priv->map);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(priv->map);
 }
 
 static int nft_ng_random_dump(struct sk_buff *skb, const struct nft_expr *expr)
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index 6275106..bc6c8ab 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -93,10 +93,8 @@ static int connlimit_mt_check(const struct xt_mtchk_param *par)
 
 	/* init private data */
 	info->data = nf_conncount_init(par->net, par->family, keylen);
-	if (IS_ERR(info->data))
-		return PTR_ERR(info->data);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(info->data);
 }
 
 static void connlimit_mt_destroy(const struct xt_mtdtor_param *par)
-- 
2.7.0