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tracing: Use free_trace_buffer() in allocate_trace_buffers() 

In allocate_trace_buffers(), if allocating tr->max_buffer
fails, we can directly call free_trace_buffer to free
tr->array_buffer.

Link: https://lkml.kernel.org/r/65f0702d-07f6-08de-2a07-4c50af56a67b@huawei.com

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Zhiqiang Liu 2022-07-20 10:46:48 +08:00 committed by Steven Rostedt (Google)
parent 4c3d2f9388
commit 59927cbe3f
1 changed files with 11 additions and 14 deletions
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25
kernel/trace/trace.c
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@ -9101,6 +9101,16 @@ allocate_trace_buffer(struct trace_array *tr, struct array_buffer *buf, int size
return 0;
}
static void free_trace_buffer(struct array_buffer *buf)
{
if (buf->buffer) {
ring_buffer_free(buf->buffer);
buf->buffer = NULL;
free_percpu(buf->data);
buf->data = NULL;
}
}
static int allocate_trace_buffers(struct trace_array *tr, int size)
{
int ret;
@ -9113,10 +9123,7 @@ static int allocate_trace_buffers(struct trace_array *tr, int size)
ret = allocate_trace_buffer(tr, &tr->max_buffer,
allocate_snapshot ? size : 1);
if (MEM_FAIL(ret, "Failed to allocate trace buffer\n")) {
ring_buffer_free(tr->array_buffer.buffer);
tr->array_buffer.buffer = NULL;
free_percpu(tr->array_buffer.data);
tr->array_buffer.data = NULL;
free_trace_buffer(&tr->array_buffer);
return -ENOMEM;
}
tr->allocated_snapshot = allocate_snapshot;
@ -9131,16 +9138,6 @@ static int allocate_trace_buffers(struct trace_array *tr, int size)
return 0;
}
static void free_trace_buffer(struct array_buffer *buf)
{
if (buf->buffer) {
ring_buffer_free(buf->buffer);
buf->buffer = NULL;
free_percpu(buf->data);
buf->data = NULL;
}
}
static void free_trace_buffers(struct trace_array *tr)
{
if (!tr)