21 static void mon_stop(struct mon_bus *mbus);
22 static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus);
34  * This must be called with mon_lock taken because of mbus->ref.
36 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r)  in mon_reader_add()  argument
41 	spin_lock_irqsave(&mbus->lock, flags);  in mon_reader_add()
42 	if (mbus->nreaders == 0) {  in mon_reader_add()
43 		if (mbus == &mon_bus0) {  in mon_reader_add()
50 			mbus->u_bus->monitored = 1;  in mon_reader_add()
53 	mbus->nreaders++;  in mon_reader_add()
54 	list_add_tail(&r->r_link, &mbus->r_list);  in mon_reader_add()
55 	spin_unlock_irqrestore(&mbus->lock, flags);  in mon_reader_add()
57 	kref_get(&mbus->ref);  in mon_reader_add()
63  * This is called with mon_lock taken, so we can decrement mbus->ref.
65 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r)  in mon_reader_del()  argument
69 	spin_lock_irqsave(&mbus->lock, flags);  in mon_reader_del()
71 	--mbus->nreaders;  in mon_reader_del()
72 	if (mbus->nreaders == 0)  in mon_reader_del()
73 		mon_stop(mbus);  in mon_reader_del()
74 	spin_unlock_irqrestore(&mbus->lock, flags);  in mon_reader_del()
76 	kref_put(&mbus->ref, mon_bus_drop);  in mon_reader_del()
81 static void mon_bus_submit(struct mon_bus *mbus, struct urb *urb)  in mon_bus_submit()  argument
86 	spin_lock_irqsave(&mbus->lock, flags);  in mon_bus_submit()
87 	mbus->cnt_events++;  in mon_bus_submit()
88 	list_for_each_entry(r, &mbus->r_list, r_link)  in mon_bus_submit()
90 	spin_unlock_irqrestore(&mbus->lock, flags);  in mon_bus_submit()
95 	struct mon_bus *mbus;  in mon_submit()  local
97 	mbus = ubus->mon_bus;  in mon_submit()
98 	if (mbus != NULL)  in mon_submit()
99 		mon_bus_submit(mbus, urb);  in mon_submit()
105 static void mon_bus_submit_error(struct mon_bus *mbus, struct urb *urb, int error)  in mon_bus_submit_error()  argument
110 	spin_lock_irqsave(&mbus->lock, flags);  in mon_bus_submit_error()
111 	mbus->cnt_events++;  in mon_bus_submit_error()
112 	list_for_each_entry(r, &mbus->r_list, r_link)  in mon_bus_submit_error()
114 	spin_unlock_irqrestore(&mbus->lock, flags);  in mon_bus_submit_error()
119 	struct mon_bus *mbus;  in mon_submit_error()  local
121 	mbus = ubus->mon_bus;  in mon_submit_error()
122 	if (mbus != NULL)  in mon_submit_error()
123 		mon_bus_submit_error(mbus, urb, error);  in mon_submit_error()
129 static void mon_bus_complete(struct mon_bus *mbus, struct urb *urb, int status)  in mon_bus_complete()  argument
134 	spin_lock_irqsave(&mbus->lock, flags);  in mon_bus_complete()
135 	mbus->cnt_events++;  in mon_bus_complete()
136 	list_for_each_entry(r, &mbus->r_list, r_link)  in mon_bus_complete()
138 	spin_unlock_irqrestore(&mbus->lock, flags);  in mon_bus_complete()
143 	struct mon_bus *mbus;  in mon_complete()  local
145 	mbus = ubus->mon_bus;  in mon_complete()
146 	if (mbus != NULL)  in mon_complete()
147 		mon_bus_complete(mbus, urb, status);  in mon_complete()
156 static void mon_stop(struct mon_bus *mbus)  in mon_stop()  argument
160 	if (mbus == &mon_bus0) {  in mon_stop()
161 		list_for_each_entry(mbus, &mon_buses, bus_link) {  in mon_stop()
165 			if (mbus->nreaders == 0 && (ubus = mbus->u_bus) != NULL)  in mon_stop()
173 		if (mon_bus0.nreaders == 0 && (ubus = mbus->u_bus) != NULL) {  in mon_stop()
200 	struct mon_bus *mbus = ubus->mon_bus;  in mon_bus_remove()  local
203 	list_del(&mbus->bus_link);  in mon_bus_remove()
204 	if (mbus->text_inited)  in mon_bus_remove()
205 		mon_text_del(mbus);  in mon_bus_remove()
206 	if (mbus->bin_inited)  in mon_bus_remove()
207 		mon_bin_del(mbus);  in mon_bus_remove()
209 	mon_dissolve(mbus, ubus);  in mon_bus_remove()
210 	kref_put(&mbus->ref, mon_bus_drop);  in mon_bus_remove()
243 static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus)  in mon_dissolve()  argument
252 	mbus->u_bus = NULL;  in mon_dissolve()
262 	struct mon_bus *mbus = container_of(r, struct mon_bus, ref);  in mon_bus_drop()  local
263 	kfree(mbus);  in mon_bus_drop()
274 	struct mon_bus *mbus;  in mon_bus_init()  local
276 	mbus = kzalloc(sizeof(struct mon_bus), GFP_KERNEL);  in mon_bus_init()
277 	if (mbus == NULL)  in mon_bus_init()
279 	kref_init(&mbus->ref);  in mon_bus_init()
280 	spin_lock_init(&mbus->lock);  in mon_bus_init()
281 	INIT_LIST_HEAD(&mbus->r_list);  in mon_bus_init()
287 	mbus->u_bus = ubus;  in mon_bus_init()
288 	ubus->mon_bus = mbus;  in mon_bus_init()
290 	mbus->text_inited = mon_text_add(mbus, ubus);  in mon_bus_init()
291 	mbus->bin_inited = mon_bin_add(mbus, ubus);  in mon_bus_init()
294 	list_add_tail(&mbus->bus_link, &mon_buses);  in mon_bus_init()
304 	struct mon_bus *mbus = &mon_bus0;  in mon_bus0_init()  local
306 	kref_init(&mbus->ref);  in mon_bus0_init()
307 	spin_lock_init(&mbus->lock);  in mon_bus0_init()
308 	INIT_LIST_HEAD(&mbus->r_list);  in mon_bus0_init()
310 	mbus->text_inited = mon_text_add(mbus, NULL);  in mon_bus0_init()
311 	mbus->bin_inited = mon_bin_add(mbus, NULL);  in mon_bus0_init()
324 	struct mon_bus *mbus;  in mon_bus_lookup()  local
329 	list_for_each_entry(mbus, &mon_buses, bus_link) {  in mon_bus_lookup()
330 		if (mbus->u_bus->busnum == num) {  in mon_bus_lookup()
331 			return mbus;  in mon_bus_lookup()
373 	struct mon_bus *mbus;  in mon_exit()  local
383 		mbus = list_entry(p, struct mon_bus, bus_link);  in mon_exit()
386 		if (mbus->text_inited)  in mon_exit()
387 			mon_text_del(mbus);  in mon_exit()
388 		if (mbus->bin_inited)  in mon_exit()
389 			mon_bin_del(mbus);  in mon_exit()
396 		if (mbus->nreaders) {  in mon_exit()
399 			    mbus->nreaders, mbus->u_bus->busnum);  in mon_exit()
400 			kref_get(&mbus->ref); /* Force leak */  in mon_exit()
403 		mon_dissolve(mbus, mbus->u_bus);  in mon_exit()
404 		kref_put(&mbus->ref, mon_bus_drop);  in mon_exit()
407 	mbus = &mon_bus0;  in mon_exit()
408 	if (mbus->text_inited)  in mon_exit()
409 		mon_text_del(mbus);  in mon_exit()
410 	if (mbus->bin_inited)  in mon_exit()
411 		mon_bin_del(mbus);  in mon_exit()