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sample-trace-array: Remove trace_array 'sample-instance' 

Remove trace_array 'sample-instance' if kthread_run fails
in sample_trace_array_init().

Link: https://lkml.kernel.org/r/20200609135200.2206726-1-wangkefeng.wang@huawei.com

Cc: stable@vger.kernel.org
Fixes: 89ed42495e ("tracing: Sample module to demonstrate kernel access to Ftrace instances.")
Reviewed-by: Divya Indi <divya.indi@oracle.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Kefeng Wang 2020-06-09 13:52:00 +00:00 committed by Steven Rostedt (VMware)
parent e9b7b1c0c1
commit 9fbc01cdba
1 changed files with 5 additions and 1 deletions
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6
samples/ftrace/sample-trace-array.c
View File

@ -115,8 +115,12 @@ static int __init sample_trace_array_init(void)
trace_printk_init_buffers();
simple_tsk = kthread_run(simple_thread, NULL, "sample-instance");
if (IS_ERR(simple_tsk))
if (IS_ERR(simple_tsk)) {
trace_array_put(tr);
trace_array_destroy(tr);
return -1;
}
return 0;
}