linux-kernel - [PATCH 3/5] perf kvm: Fill in the missing freeing a session after an error occur

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Message-Id: <1435652124-22414-4-git-send-email-treeze.taeung@gmail.com>
Date:	Tue, 30 Jun 2015 17:15:22 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, jolsa@...hat.com,
	namhyung@...nel.org, Ingo Molnar <mingo@...hat.com>,
	Taeung Song <treeze.taeung@...il.com>
Subject: [PATCH 3/5] perf kvm: Fill in the missing freeing a session after an error occur

When an error occur a error value is just returned
without freeing the session. So allocating and freeing
session have to be matched as a pair even if an error occur.

Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 tools/perf/builtin-kvm.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 74878cd..5fa96a0 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1061,8 +1061,10 @@ static int read_events(struct perf_kvm_stat *kvm)
 
 	symbol__init(&kvm->session->header.env);
 
-	if (!perf_session__has_traces(kvm->session, "kvm record"))
-		return -EINVAL;
+	if (!perf_session__has_traces(kvm->session, "kvm record")) {
+		ret = -EINVAL;
+		goto out_delete;
+	}
 
 	/*
 	 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
@@ -1070,9 +1072,15 @@ static int read_events(struct perf_kvm_stat *kvm)
 	 */
 	ret = cpu_isa_config(kvm);
 	if (ret < 0)
-		return ret;
+		goto out_delete;
 
-	return perf_session__process_events(kvm->session);
+	ret = perf_session__process_events(kvm->session);
+	if (ret < 0)
+		goto out_delete;
+
+out_delete:
+	perf_session__delete(kvm->session);
+	return ret;
 }
 
 static int parse_target_str(struct perf_kvm_stat *kvm)
-- 
1.9.1

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