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Subject: [patch] x86, bts: fix unlock problem in ds.c
To: lkml <linux-kernel@vger.kernel.org>
Cc: work <markus.t.metzger@intel.com>, "H. Peter Anvin" <hpa@zytor.com>,
       stephane eranian <eranian@googlemail.com>,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Content-Type: text/plain
Date: Sat, 15 Nov 2008 11:00:17 +0100
Message-Id: <1226743217.6162.4.camel@raistlin>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
From: Markus Metzger <markus.t.metzger@googlemail.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 869
Lines: 29

Fix a problem where ds_request() returned an error without releasing the
ds lock.

Reported-by: Stephane Eranian <eranian@gmail.com>
Signed-off-by: Markus Metzger <markus.t.metzger@gmail.com>
---

Index: gits/arch/x86/kernel/ds.c
===================================================================
--- gits.orig/arch/x86/kernel/ds.c	2008-11-15 10:51:51.000000000 +0100
+++ gits/arch/x86/kernel/ds.c	2008-11-15 10:53:43.000000000 +0100
@@ -384,8 +384,9 @@
 
 	spin_lock(&ds_lock);
 
+	error = -EPERM;
 	if (!check_tracer(task))
-		return -EPERM;
+		goto out_unlock;
 
 	error = -ENOMEM;
 	context = ds_alloc_context(task);


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