[027/118] tracing: Check return value of tracing_init_dentry()

Ben Hutchings
2013-05-10T14:22:13Z

From: Namhyung Kim <namhyung.kim@lge.com>

commit ed6f1c996bfe4b6e520cf7a74b51cd6988d84420 upstream.

Check return value and bail out if it's NULL.

Link: http://lkml.kernel.org/r/1365553093-10180-2-git-send-email-namhyung@kernel.org

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
kernel/trace/trace.c | 2 ++
kernel/trace/trace_stack.c | 2 ++
kernel/trace/trace_stat.c | 2 ++
3 files changed, 6 insertions(+)

--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4563,6 +4563,8 @@ static __init int tracer_init_debugfs(vo
trace_access_lock_init();

d_tracer = tracing_init_dentry();
+ if (!d_tracer)
+ return 0;

trace_create_file("tracing_enabled", 0644, d_tracer,
&global_trace, &tracing_ctrl_fops);
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -411,6 +411,8 @@ static __init int stack_trace_init(void)
struct dentry *d_tracer;

d_tracer = tracing_init_dentry();
+ if (!d_tracer)
+ return 0;

trace_create_file("stack_max_size", 0644, d_tracer,
&max_stack_size, &stack_max_size_fops);
--- a/kernel/trace/trace_stat.c
+++ b/kernel/trace/trace_stat.c
@@ -307,6 +307,8 @@ static int tracing_stat_init(void)
struct dentry *d_tracing;

d_tracing = tracing_init_dentry();
+ if (!d_tracing)
+ return 0;

stat_dir = debugfs_create_dir("trace_stat", d_tracing);
if (!stat_dir)