@@ -590,36 +590,34 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
WARN_ON(in_nmi());
mutex_lock(&sdei_events_lock);
- do {
- if (sdei_event_find(event_num)) {
- pr_warn("Event %u already registered\n", event_num);
- err = -EBUSY;
- break;
- }
+ if (sdei_event_find(event_num)) {
+ pr_warn("Event %u already registered\n", event_num);
+ err = -EBUSY;
+ goto unlock;
+ }
- event = sdei_event_create(event_num, cb, arg);
- if (IS_ERR(event)) {
- err = PTR_ERR(event);
- pr_warn("Failed to create event %u: %d\n", event_num,
- err);
- break;
- }
+ event = sdei_event_create(event_num, cb, arg);
+ if (IS_ERR(event)) {
+ err = PTR_ERR(event);
+ pr_warn("Failed to create event %u: %d\n", event_num, err);
+ goto unlock;
+ }
- cpus_read_lock();
- err = _sdei_event_register(event);
- if (err) {
- sdei_event_destroy(event);
- pr_warn("Failed to register event %u: %d\n", event_num,
- err);
- } else {
- spin_lock(&sdei_list_lock);
- event->reregister = true;
- spin_unlock(&sdei_list_lock);
- }
- cpus_read_unlock();
- } while (0);
- mutex_unlock(&sdei_events_lock);
+ cpus_read_lock();
+ err = _sdei_event_register(event);
+ if (err) {
+ sdei_event_destroy(event);
+ pr_warn("Failed to register event %u: %d\n", event_num, err);
+ goto cpu_unlock;
+ }
+ spin_lock(&sdei_list_lock);
+ event->reregister = true;
+ spin_unlock(&sdei_list_lock);
+cpu_unlock:
+ cpus_read_unlock();
+unlock:
+ mutex_unlock(&sdei_events_lock);
return err;
}
This removes the unnecessary while loop in sdei_event_register() because of the following two reasons. This shouldn't cause any functional changes. * The while loop is executed for once, meaning it's not needed in theory. * With the while loop removed, the nested statements can be avoid to make the code a bit cleaner. Signed-off-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- drivers/firmware/arm_sdei.c | 52 ++++++++++++++++++------------------- 1 file changed, 25 insertions(+), 27 deletions(-)