[PATCH] tracing: missing error code in tracer_alloc_buffers()

[Dan Carpenter]

If ring_buffer_alloc() or one of the next couple function calls fail
then we should return -ENOMEM but the current code returns success.

Fixes: b32614c03413 ('tracing/rb: Convert to hotplug state machine')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 42b9355033d4..625c00aab800 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -8293,6 +8293,7 @@ __init static int tracer_alloc_buffers(void)
        if (ret < 0)
                goto out_free_cpumask;
        /* Used for event triggers */
+       ret = -ENOMEM;
        temp_buffer = ring_buffer_alloc(PAGE_SIZE, RB_FL_OVERWRITE);
        if (!temp_buffer)
                goto out_rm_hp_state;