From 4ec7ecb414e3ea0d0c7d9c66d00e121adc62a01a Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Sun, 16 Nov 2008 05:53:19 +0100
Subject: [PATCH] --- yaml --- r: 121127 b: refs/heads/master c:
 e6e7a65aabdb696cf05a56cfd495c49a11fd4cde h: refs/heads/master i:   121125:
 0ca372bad9418a2bf1d284397c74521fe122b5e7   121123:
 42a9cd361eea1469f1fd49add5d87e77a297d864   121119:
 b0b545d439ec6bc265bf4aa8a41f10e3cd2d27eb v: v3

---
 [refs]                     |  2 +-
 trunk/kernel/trace/trace.c | 12 +++++++-----
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/[refs] b/[refs]
index 966b983a07f5..cf0c2f5f0e46 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ee02a2e5c88ca2e4d6921f08d037b46d5bf82641
+refs/heads/master: e6e7a65aabdb696cf05a56cfd495c49a11fd4cde
diff --git a/trunk/kernel/trace/trace.c b/trunk/kernel/trace/trace.c
index dff4bee591b9..80898f4870cc 100644
--- a/trunk/kernel/trace/trace.c
+++ b/trunk/kernel/trace/trace.c
@@ -2655,6 +2655,9 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
 	char buf[max_tracer_type_len+1];
 	int i;
 	size_t ret;
+	int err;
+
+	ret = cnt;
 
 	if (cnt > max_tracer_type_len)
 		cnt = max_tracer_type_len;
@@ -2668,12 +2671,11 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
 	for (i = cnt - 1; i > 0 && isspace(buf[i]); i--)
 		buf[i] = 0;
 
-	ret = tracing_set_tracer(buf);
-	if (!ret)
-		ret = cnt;
+	err = tracing_set_tracer(buf);
+	if (err)
+		return err;
 
-	if (ret > 0)
-		filp->f_pos += ret;
+	filp->f_pos += ret;
 
 	return ret;
 }