linux-kernel - [077/118] perf: Fix error return code

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Message-ID: <lsq.1368193181.647822379@decadent.org.uk>
Date:	Fri, 10 May 2013 14:39:41 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Ingo Molnar" <mingo@...nel.org>,
	paulus@...ba.org, a.p.zijlstra@...llo.nl, acme@...stprotocols.net,
	"Wei Yongjun" <yongjun_wei@...ndmicro.com.cn>
Subject: [077/118] perf: Fix error return code

3.2.45-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

commit c481420248c6730246d2a1b1773d5d7007ae0835 upstream.

Fix to return -ENOMEM in the allocation error case instead of 0
(if pmu_bus_running == 1), as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
Cc: a.p.zijlstra@...llo.nl
Cc: paulus@...ba.org
Cc: acme@...stprotocols.net
Link: http://lkml.kernel.org/r/CAPgLHd8j_fWcgqe%3DKLWjpBj%2B%3Do0Pw6Z-SEq%3DNTPU08c2w1tngQ@mail.gmail.com
[ Tweaked the error code setting placement and the changelog. ]
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 kernel/events/core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5756,6 +5756,7 @@ skip_type:
 	if (pmu->pmu_cpu_context)
 		goto got_cpu_context;
 
+	ret = -ENOMEM;
 	pmu->pmu_cpu_context = alloc_percpu(struct perf_cpu_context);
 	if (!pmu->pmu_cpu_context)
 		goto free_dev;

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