[PATCH 2/2] tracing: Reset ftrace_graph_filter_enabled if count is zero

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@xxxxxxx>

The ftrace_graph_count can be decreased with a "!" pattern, so that
the enabled flag should be updated too.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 kernel/trace/ftrace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index be2bcb7ab2f7..3b5ef16692c5 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3779,7 +3779,11 @@ out:
 	if (fail)
 		return -EINVAL;
 
-	ftrace_graph_filter_enabled = 1;
+	if (*idx)
+		ftrace_graph_filter_enabled = 1;
+	else
+		ftrace_graph_filter_enabled = 0;
+
 	return 0;
 }
 
-- 
1.7.11.7

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