1 files changed, 26 insertions, 0 deletions

diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index a2ca6f0fef9b..38856ba78a92 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -315,6 +315,14 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
         local_irq_disable();
         udelay(100);
         local_irq_enable();
+
+        /*
+         * Stop the tracer to avoid a warning subsequent
+         * to buffer flipping failure because tracing_stop()
+         * disables the tr and max buffers, making flipping impossible
+         * in case of parallels max irqs off latencies.
+         */
+        trace->stop(tr);
         /* stop the tracing. */
         tracing_stop();
         /* check both trace buffers */
@@ -369,6 +377,14 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
         preempt_disable();
         udelay(100);
         preempt_enable();
+
+        /*
+         * Stop the tracer to avoid a warning subsequent
+         * to buffer flipping failure because tracing_stop()
+         * disables the tr and max buffers, making flipping impossible
+         * in case of parallels max preempt off latencies.
+         */
+        trace->stop(tr);
         /* stop the tracing. */
         tracing_stop();
         /* check both trace buffers */
@@ -428,6 +444,13 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
         /* reverse the order of preempt vs irqs */
         local_irq_enable();
 
+        /*
+         * Stop the tracer to avoid a warning subsequent
+         * to buffer flipping failure because tracing_stop()
+         * disables the tr and max buffers, making flipping impossible
+         * in case of parallels max irqs/preempt off latencies.
+         */
+        trace->stop(tr);
         /* stop the tracing. */
         tracing_stop();
         /* check both trace buffers */
@@ -448,6 +471,8 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
         /* do the test by disabling interrupts first this time */
         tracing_max_latency = 0;
         tracing_start();
+        trace->start(tr);
+
         preempt_disable();
         local_irq_disable();
         udelay(100);
@@ -455,6 +480,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
         /* reverse the order of preempt vs irqs */
         local_irq_enable();
 
+        trace->stop(tr);
         /* stop the tracing. */
         tracing_stop();
         /* check both trace buffers */