+static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
+ struct ieee80211_roc_work *new_roc,
+ struct ieee80211_roc_work *cur_roc)
+{
+ unsigned long j = jiffies;
+ unsigned long cur_roc_end = cur_roc->hw_start_time +
+ msecs_to_jiffies(cur_roc->duration);
+ struct ieee80211_roc_work *next_roc;
+ int new_dur;
+
+ if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
+ return false;
+
+ if (time_after(j + IEEE80211_ROC_MIN_LEFT, cur_roc_end))
+ return false;
+
+ ieee80211_handle_roc_started(new_roc);
+
+ new_dur = new_roc->duration - jiffies_to_msecs(cur_roc_end - j);
+
+ /* cur_roc is long enough - add new_roc to the dependents list. */
+ if (new_dur <= 0) {
+ list_add_tail(&new_roc->list, &cur_roc->dependents);
+ return true;
+ }
+
+ new_roc->duration = new_dur;
+
+ /*
+ * if cur_roc was already coalesced before, we might
+ * want to extend the next roc instead of adding
+ * a new one.
+ */
+ next_roc = list_entry(cur_roc->list.next,
+ struct ieee80211_roc_work, list);
+ if (&next_roc->list != &local->roc_list &&
+ next_roc->chan == new_roc->chan &&
+ next_roc->sdata == new_roc->sdata &&
+ !WARN_ON(next_roc->started)) {
+ list_add_tail(&new_roc->list, &next_roc->dependents);
+ next_roc->duration = max(next_roc->duration,
+ new_roc->duration);
+ next_roc->type = max(next_roc->type, new_roc->type);
+ return true;
+ }
+
+ /* add right after cur_roc */
+ list_add(&new_roc->list, &cur_roc->list);
+
+ return true;
+}
+