[patch] x86, bts: fix unlock problem in ds.c

[Markus Metzger]

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

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

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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