tracing: fix the return value of trace selftest

This patch is to fix the return value of trace_selftest_startup_sysprof
and trace_selftest_startup_branch on failure.

Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 0c9aa1457e51..c72e749bcbef 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -622,7 +622,7 @@ trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)
         ret = tracer_init(trace, tr);
         if (ret) {
                 warn_failed_init_tracer(trace, ret);
-                return 0;
+                return ret;
         }
 
         /* Sleep for a 1/10 of a second */
@@ -634,6 +634,11 @@ trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)
         trace->reset(tr);
         tracing_start();
 
+        if (!ret && !count) {
+                printk(KERN_CONT ".. no entries found ..");
+                ret = -1;
+        }
+
         return ret;
 }
 #endif /* CONFIG_SYSPROF_TRACER */
@@ -661,6 +666,11 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
         trace->reset(tr);
         tracing_start();
 
+        if (!ret && !count) {
+                printk(KERN_CONT ".. no entries found ..");
+                ret = -1;
+        }
+
         return ret;
 }
 #endif /* CONFIG_BRANCH_TRACER */