oprofile, ARM: Use oprofile_arch_exit() to cleanup on failure
There is duplicate cleanup code in the init and exit functions. Now,
oprofile_arch_exit() is also used if oprofile_arch_init() fails.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c
index a34137f..b17235a 100644
--- a/drivers/oprofile/oprofile_perf.c
+++ b/drivers/oprofile/oprofile_perf.c
@@ -245,10 +245,33 @@
#define exit_driverfs() do { } while (0)
#endif /* CONFIG_PM */
+void oprofile_perf_exit(void)
+{
+ int cpu, id;
+ struct perf_event *event;
+
+ for_each_possible_cpu(cpu) {
+ for (id = 0; id < num_counters; ++id) {
+ event = perf_events[cpu][id];
+ if (event)
+ perf_event_release_kernel(event);
+ }
+
+ kfree(perf_events[cpu]);
+ }
+
+ kfree(counter_config);
+ exit_driverfs();
+}
+
int __init oprofile_perf_init(struct oprofile_operations *ops)
{
int cpu, ret = 0;
+ ret = init_driverfs();
+ if (ret)
+ return ret;
+
memset(&perf_events, 0, sizeof(perf_events));
num_counters = perf_num_counters();
@@ -265,13 +288,10 @@
pr_info("oprofile: failed to allocate %d "
"counters\n", num_counters);
ret = -ENOMEM;
+ num_counters = 0;
goto out;
}
- ret = init_driverfs();
- if (ret)
- goto out;
-
for_each_possible_cpu(cpu) {
perf_events[cpu] = kcalloc(num_counters,
sizeof(struct perf_event *), GFP_KERNEL);
@@ -296,30 +316,8 @@
pr_info("oprofile: using %s\n", ops->cpu_type);
out:
- if (ret) {
- for_each_possible_cpu(cpu)
- kfree(perf_events[cpu]);
- kfree(counter_config);
- }
+ if (ret)
+ oprofile_perf_exit();
return ret;
}
-
-void __exit oprofile_perf_exit(void)
-{
- int cpu, id;
- struct perf_event *event;
-
- for_each_possible_cpu(cpu) {
- for (id = 0; id < num_counters; ++id) {
- event = perf_events[cpu][id];
- if (event)
- perf_event_release_kernel(event);
- }
-
- kfree(perf_events[cpu]);
- }
-
- kfree(counter_config);
- exit_driverfs();
-}