1 // SPDX-License-Identifier: GPL-2.0
5  * User space wakeup sources support.
48 		if (wl->ws->active == show_active)  in pm_show_wakelocks()
49 			len += sysfs_emit_at(buf, len, "%s ", wl->name);  in pm_show_wakelocks()
53 		--len;  in pm_show_wakelocks()
76 	number_of_wakelocks--;  in decrement_wakelocks_number()
95 	list_add(&wl->lru, &wakelocks_lru_list);  in wakelocks_lru_add()
100 	list_move(&wl->lru, &wakelocks_lru_list);  in wakelocks_lru_most_recent()
115 		spin_lock_irq(&wl->ws->lock);  in __wakelocks_gc()
116 		idle_time_ns = ktime_to_ns(ktime_sub(now, wl->ws->last_time));  in __wakelocks_gc()
117 		active = wl->ws->active;  in __wakelocks_gc()
118 		spin_unlock_irq(&wl->ws->lock);  in __wakelocks_gc()
124 			wakeup_source_unregister(wl->ws);  in __wakelocks_gc()
125 			rb_erase(&wl->node, &wakelocks_tree);  in __wakelocks_gc()
126 			list_del(&wl->lru);  in __wakelocks_gc()
127 			kfree(wl->name);  in __wakelocks_gc()
162 		diff = strncmp(name, wl->name, len);  in wakelock_lookup_add()
164 			if (wl->name[len])  in wakelock_lookup_add()
165 				diff = -1;  in wakelock_lookup_add()
170 			node = &(*node)->rb_left;  in wakelock_lookup_add()
172 			node = &(*node)->rb_right;  in wakelock_lookup_add()
175 		return ERR_PTR(-EINVAL);  in wakelock_lookup_add()
178 		return ERR_PTR(-ENOSPC);  in wakelock_lookup_add()
183 		return ERR_PTR(-ENOMEM);  in wakelock_lookup_add()
185 	wl->name = kstrndup(name, len, GFP_KERNEL);  in wakelock_lookup_add()
186 	if (!wl->name) {  in wakelock_lookup_add()
188 		return ERR_PTR(-ENOMEM);  in wakelock_lookup_add()
191 	wl->ws = wakeup_source_register(NULL, wl->name);  in wakelock_lookup_add()
192 	if (!wl->ws) {  in wakelock_lookup_add()
193 		kfree(wl->name);  in wakelock_lookup_add()
195 		return ERR_PTR(-ENOMEM);  in wakelock_lookup_add()
197 	wl->ws->last_time = ktime_get();  in wakelock_lookup_add()
199 	rb_link_node(&wl->node, parent, node);  in wakelock_lookup_add()
200 	rb_insert_color(&wl->node, &wakelocks_tree);  in wakelock_lookup_add()
214 	if (!capable(CAP_BLOCK_SUSPEND))  in pm_wake_lock()
215 		return -EPERM;  in pm_wake_lock()
220 	len = str - buf;  in pm_wake_lock()
222 		return -EINVAL;  in pm_wake_lock()
228 			return -EINVAL;  in pm_wake_lock()
239 		u64 timeout_ms = timeout_ns + NSEC_PER_MSEC - 1;  in pm_wake_lock()
242 		__pm_wakeup_event(wl->ws, timeout_ms);  in pm_wake_lock()
244 		__pm_stay_awake(wl->ws);  in pm_wake_lock()
260 	if (!capable(CAP_BLOCK_SUSPEND))  in pm_wake_unlock()
261 		return -EPERM;  in pm_wake_unlock()
265 		return -EINVAL;  in pm_wake_unlock()
267 	if (buf[len-1] == '\n')  in pm_wake_unlock()
268 		len--;  in pm_wake_unlock()
271 		return -EINVAL;  in pm_wake_unlock()
280 	__pm_relax(wl->ws);  in pm_wake_unlock()