From 9d7d74029e0f5fde3b88b39892b9b9cfdf4ea10a Mon Sep 17 00:00:00 2001 From: Julien Brunel Date: Tue, 2 Sep 2008 17:24:28 -0700 Subject: [PATCH] net/xfrm: Use an IS_ERR test rather than a NULL test In case of error, the function xfrm_bundle_create returns an ERR pointer, but never returns a NULL pointer. So a NULL test that comes after an IS_ERR test should be deleted. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @match_bad_null_test@ expression x, E; statement S1,S2; @@ x = xfrm_bundle_create(...) ... when != x = E * if (x != NULL) S1 else S2 // Signed-off-by: Julien Brunel Signed-off-by: Julia Lawall Signed-off-by: David S. Miller --- net/xfrm/xfrm_policy.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 841b32a2e6..46914b79d8 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1731,8 +1731,7 @@ restart: * We can't enlist stable bundles either. */ write_unlock_bh(&policy->lock); - if (dst) - dst_free(dst); + dst_free(dst); if (pol_dead) XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLDEAD); @@ -1748,8 +1747,7 @@ restart: err = xfrm_dst_update_origin(dst, fl); if (unlikely(err)) { write_unlock_bh(&policy->lock); - if (dst) - dst_free(dst); + dst_free(dst); XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR); goto error; } -- 2.39.5