linux-kernel - [PATCH] ARM: 8351/1: perf: fix memory leak on return

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Message-Id: <1431693789-9679-1-git-send-email-colin.king@canonical.com>
Date:	Fri, 15 May 2015 13:43:09 +0100
From:	Colin King <colin.king@...onical.com>
To:	Will Deacon <will.deacon@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: 8351/1: perf: fix memory leak on return

From: Colin Ian King <colin.king@...onical.com>

Recent commit 3b8786ff7a1b31645ae2c26a2ec32dbd42ac1094
("ARM: 8352/1: perf: Fix the pmu node name in warning message")
introduced a memory leak of irqs on the "Don't bother with PPIs"
return path. This was picked up by static analysis by cppcheck:

[arch/arm/kernel/perf_event_cpu.c:315]: (error) Memory leak: irqs

simpele fix is to free irqs when returning.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 arch/arm/kernel/perf_event_cpu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index 213919b..9e5b2a5 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -311,8 +311,10 @@ static int of_pmu_irq_cfg(struct platform_device *pdev)
 
 	/* Don't bother with PPIs; they're already affine */
 	irq = platform_get_irq(pdev, 0);
-	if (irq >= 0 && irq_is_percpu(irq))
+	if (irq >= 0 && irq_is_percpu(irq)) {
+		kfree(irqs);
 		return 0;
+	}
 
 	for (i = 0; i < pdev->num_resources; ++i) {
 		struct device_node *dn;
-- 
2.1.4

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