Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /********************************************************************* |
6819bc2e | 2 | * |
1da177e4 | 3 | * Filename: ircomm_tty_attach.c |
6819bc2e | 4 | * Version: |
1da177e4 LT |
5 | * Description: Code for attaching the serial driver to IrCOMM |
6 | * Status: Experimental. | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Sat Jun 5 17:42:00 1999 | |
9 | * Modified at: Tue Jan 4 14:20:49 2000 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
6819bc2e | 11 | * |
1da177e4 LT |
12 | * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved. |
13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
6819bc2e YH |
14 | * |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
1da177e4 | 18 | * the License, or (at your option) any later version. |
6819bc2e | 19 | * |
1da177e4 LT |
20 | * This program is distributed in the hope that it will be useful, |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
6819bc2e YH |
24 | * |
25 | * You should have received a copy of the GNU General Public License | |
d3770509 | 26 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
6819bc2e | 27 | * |
1da177e4 LT |
28 | ********************************************************************/ |
29 | ||
1da177e4 | 30 | #include <linux/init.h> |
d43c36dc | 31 | #include <linux/sched.h> |
1da177e4 LT |
32 | |
33 | #include <net/irda/irda.h> | |
34 | #include <net/irda/irlmp.h> | |
35 | #include <net/irda/iriap.h> | |
36 | #include <net/irda/irttp.h> | |
37 | #include <net/irda/irias_object.h> | |
38 | #include <net/irda/parameters.h> | |
39 | ||
40 | #include <net/irda/ircomm_core.h> | |
41 | #include <net/irda/ircomm_param.h> | |
42 | #include <net/irda/ircomm_event.h> | |
43 | ||
44 | #include <net/irda/ircomm_tty.h> | |
45 | #include <net/irda/ircomm_tty_attach.h> | |
46 | ||
47 | static void ircomm_tty_ias_register(struct ircomm_tty_cb *self); | |
48 | static void ircomm_tty_discovery_indication(discinfo_t *discovery, | |
49 | DISCOVERY_MODE mode, | |
50 | void *priv); | |
6819bc2e | 51 | static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id, |
1da177e4 LT |
52 | struct ias_value *value, void *priv); |
53 | static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self, | |
54 | int timeout); | |
55 | static void ircomm_tty_watchdog_timer_expired(void *data); | |
56 | ||
6819bc2e YH |
57 | static int ircomm_tty_state_idle(struct ircomm_tty_cb *self, |
58 | IRCOMM_TTY_EVENT event, | |
59 | struct sk_buff *skb, | |
1da177e4 | 60 | struct ircomm_tty_info *info); |
6819bc2e YH |
61 | static int ircomm_tty_state_search(struct ircomm_tty_cb *self, |
62 | IRCOMM_TTY_EVENT event, | |
63 | struct sk_buff *skb, | |
1da177e4 | 64 | struct ircomm_tty_info *info); |
6819bc2e YH |
65 | static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self, |
66 | IRCOMM_TTY_EVENT event, | |
67 | struct sk_buff *skb, | |
1da177e4 | 68 | struct ircomm_tty_info *info); |
6819bc2e YH |
69 | static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self, |
70 | IRCOMM_TTY_EVENT event, | |
71 | struct sk_buff *skb, | |
1da177e4 | 72 | struct ircomm_tty_info *info); |
6819bc2e YH |
73 | static int ircomm_tty_state_setup(struct ircomm_tty_cb *self, |
74 | IRCOMM_TTY_EVENT event, | |
75 | struct sk_buff *skb, | |
1da177e4 | 76 | struct ircomm_tty_info *info); |
6819bc2e YH |
77 | static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, |
78 | IRCOMM_TTY_EVENT event, | |
79 | struct sk_buff *skb, | |
1da177e4 LT |
80 | struct ircomm_tty_info *info); |
81 | ||
36cbd3dc | 82 | const char *const ircomm_tty_state[] = { |
1da177e4 LT |
83 | "IRCOMM_TTY_IDLE", |
84 | "IRCOMM_TTY_SEARCH", | |
85 | "IRCOMM_TTY_QUERY_PARAMETERS", | |
86 | "IRCOMM_TTY_QUERY_LSAP_SEL", | |
87 | "IRCOMM_TTY_SETUP", | |
88 | "IRCOMM_TTY_READY", | |
89 | "*** ERROR *** ", | |
90 | }; | |
91 | ||
a768851f | 92 | static const char *const ircomm_tty_event[] __maybe_unused = { |
1da177e4 LT |
93 | "IRCOMM_TTY_ATTACH_CABLE", |
94 | "IRCOMM_TTY_DETACH_CABLE", | |
95 | "IRCOMM_TTY_DATA_REQUEST", | |
96 | "IRCOMM_TTY_DATA_INDICATION", | |
97 | "IRCOMM_TTY_DISCOVERY_REQUEST", | |
98 | "IRCOMM_TTY_DISCOVERY_INDICATION", | |
99 | "IRCOMM_TTY_CONNECT_CONFIRM", | |
100 | "IRCOMM_TTY_CONNECT_INDICATION", | |
101 | "IRCOMM_TTY_DISCONNECT_REQUEST", | |
102 | "IRCOMM_TTY_DISCONNECT_INDICATION", | |
103 | "IRCOMM_TTY_WD_TIMER_EXPIRED", | |
104 | "IRCOMM_TTY_GOT_PARAMETERS", | |
105 | "IRCOMM_TTY_GOT_LSAPSEL", | |
106 | "*** ERROR ****", | |
107 | }; | |
1da177e4 LT |
108 | |
109 | static int (*state[])(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event, | |
6819bc2e | 110 | struct sk_buff *skb, struct ircomm_tty_info *info) = |
1da177e4 LT |
111 | { |
112 | ircomm_tty_state_idle, | |
113 | ircomm_tty_state_search, | |
114 | ircomm_tty_state_query_parameters, | |
115 | ircomm_tty_state_query_lsap_sel, | |
116 | ircomm_tty_state_setup, | |
117 | ircomm_tty_state_ready, | |
118 | }; | |
119 | ||
120 | /* | |
121 | * Function ircomm_tty_attach_cable (driver) | |
122 | * | |
123 | * Try to attach cable (IrCOMM link). This function will only return | |
6819bc2e | 124 | * when the link has been connected, or if an error condition occurs. |
1da177e4 LT |
125 | * If success, the return value is the resulting service type. |
126 | */ | |
127 | int ircomm_tty_attach_cable(struct ircomm_tty_cb *self) | |
128 | { | |
62f228ac JS |
129 | struct tty_struct *tty; |
130 | ||
1da177e4 LT |
131 | IRDA_ASSERT(self != NULL, return -1;); |
132 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); | |
133 | ||
6819bc2e | 134 | /* Check if somebody has already connected to us */ |
1da177e4 | 135 | if (ircomm_is_connected(self->ircomm)) { |
955a9d20 | 136 | pr_debug("%s(), already connected!\n", __func__); |
1da177e4 LT |
137 | return 0; |
138 | } | |
139 | ||
140 | /* Make sure nobody tries to write before the link is up */ | |
62f228ac JS |
141 | tty = tty_port_tty_get(&self->port); |
142 | if (tty) { | |
143 | tty->hw_stopped = 1; | |
144 | tty_kref_put(tty); | |
145 | } | |
1da177e4 LT |
146 | |
147 | ircomm_tty_ias_register(self); | |
148 | ||
149 | ircomm_tty_do_event(self, IRCOMM_TTY_ATTACH_CABLE, NULL, NULL); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Function ircomm_detach_cable (driver) | |
156 | * | |
157 | * Detach cable, or cable has been detached by peer | |
158 | * | |
159 | */ | |
160 | void ircomm_tty_detach_cable(struct ircomm_tty_cb *self) | |
161 | { | |
1da177e4 LT |
162 | IRDA_ASSERT(self != NULL, return;); |
163 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
164 | ||
165 | del_timer(&self->watchdog_timer); | |
166 | ||
167 | /* Remove discovery handler */ | |
168 | if (self->ckey) { | |
169 | irlmp_unregister_client(self->ckey); | |
170 | self->ckey = NULL; | |
171 | } | |
172 | /* Remove IrCOMM hint bits */ | |
173 | if (self->skey) { | |
174 | irlmp_unregister_service(self->skey); | |
175 | self->skey = NULL; | |
176 | } | |
177 | ||
6819bc2e | 178 | if (self->iriap) { |
1da177e4 LT |
179 | iriap_close(self->iriap); |
180 | self->iriap = NULL; | |
181 | } | |
182 | ||
183 | /* Remove LM-IAS object */ | |
184 | if (self->obj) { | |
185 | irias_delete_object(self->obj); | |
186 | self->obj = NULL; | |
187 | } | |
188 | ||
189 | ircomm_tty_do_event(self, IRCOMM_TTY_DETACH_CABLE, NULL, NULL); | |
190 | ||
191 | /* Reset some values */ | |
192 | self->daddr = self->saddr = 0; | |
193 | self->dlsap_sel = self->slsap_sel = 0; | |
194 | ||
195 | memset(&self->settings, 0, sizeof(struct ircomm_params)); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Function ircomm_tty_ias_register (self) | |
200 | * | |
201 | * Register with LM-IAS depending on which service type we are | |
202 | * | |
203 | */ | |
204 | static void ircomm_tty_ias_register(struct ircomm_tty_cb *self) | |
205 | { | |
206 | __u8 oct_seq[6]; | |
207 | __u16 hints; | |
208 | ||
1da177e4 LT |
209 | IRDA_ASSERT(self != NULL, return;); |
210 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
6819bc2e | 211 | |
1da177e4 LT |
212 | /* Compute hint bits based on service */ |
213 | hints = irlmp_service_to_hint(S_COMM); | |
214 | if (self->service_type & IRCOMM_3_WIRE_RAW) | |
215 | hints |= irlmp_service_to_hint(S_PRINTER); | |
216 | ||
217 | /* Advertise IrCOMM hint bit in discovery */ | |
218 | if (!self->skey) | |
219 | self->skey = irlmp_register_service(hints); | |
220 | /* Set up a discovery handler */ | |
221 | if (!self->ckey) | |
222 | self->ckey = irlmp_register_client(hints, | |
223 | ircomm_tty_discovery_indication, | |
224 | NULL, (void *) self); | |
225 | ||
226 | /* If already done, no need to do it again */ | |
227 | if (self->obj) | |
228 | return; | |
229 | ||
230 | if (self->service_type & IRCOMM_3_WIRE_RAW) { | |
231 | /* Register IrLPT with LM-IAS */ | |
232 | self->obj = irias_new_object("IrLPT", IAS_IRLPT_ID); | |
6819bc2e | 233 | irias_add_integer_attrib(self->obj, "IrDA:IrLMP:LsapSel", |
1da177e4 LT |
234 | self->slsap_sel, IAS_KERNEL_ATTR); |
235 | } else { | |
236 | /* Register IrCOMM with LM-IAS */ | |
237 | self->obj = irias_new_object("IrDA:IrCOMM", IAS_IRCOMM_ID); | |
6819bc2e | 238 | irias_add_integer_attrib(self->obj, "IrDA:TinyTP:LsapSel", |
1da177e4 | 239 | self->slsap_sel, IAS_KERNEL_ATTR); |
6819bc2e | 240 | |
1da177e4 | 241 | /* Code the parameters into the buffer */ |
6819bc2e | 242 | irda_param_pack(oct_seq, "bbbbbb", |
1da177e4 LT |
243 | IRCOMM_SERVICE_TYPE, 1, self->service_type, |
244 | IRCOMM_PORT_TYPE, 1, IRCOMM_SERIAL); | |
6819bc2e | 245 | |
1da177e4 LT |
246 | /* Register parameters with LM-IAS */ |
247 | irias_add_octseq_attrib(self->obj, "Parameters", oct_seq, 6, | |
248 | IAS_KERNEL_ATTR); | |
249 | } | |
250 | irias_insert_object(self->obj); | |
251 | } | |
252 | ||
253 | /* | |
254 | * Function ircomm_tty_ias_unregister (self) | |
255 | * | |
256 | * Remove our IAS object and client hook while connected. | |
257 | * | |
258 | */ | |
259 | static void ircomm_tty_ias_unregister(struct ircomm_tty_cb *self) | |
260 | { | |
261 | /* Remove LM-IAS object now so it is not reused. | |
262 | * IrCOMM deals very poorly with multiple incoming connections. | |
263 | * It should looks a lot more like IrNET, and "dup" a server TSAP | |
264 | * to the application TSAP (based on various rules). | |
265 | * This is a cheap workaround allowing multiple clients to | |
266 | * connect to us. It will not always work. | |
267 | * Each IrCOMM socket has an IAS entry. Incoming connection will | |
268 | * pick the first one found. So, when we are fully connected, | |
269 | * we remove our IAS entries so that the next IAS entry is used. | |
270 | * We do that for *both* client and server, because a server | |
271 | * can also create client instances. | |
272 | * Jean II */ | |
273 | if (self->obj) { | |
274 | irias_delete_object(self->obj); | |
275 | self->obj = NULL; | |
276 | } | |
277 | ||
278 | #if 0 | |
279 | /* Remove discovery handler. | |
280 | * While we are connected, we no longer need to receive | |
281 | * discovery events. This would be the case if there is | |
282 | * multiple IrLAP interfaces. Jean II */ | |
283 | if (self->ckey) { | |
284 | irlmp_unregister_client(self->ckey); | |
285 | self->ckey = NULL; | |
286 | } | |
287 | #endif | |
288 | } | |
289 | ||
290 | /* | |
291 | * Function ircomm_send_initial_parameters (self) | |
292 | * | |
293 | * Send initial parameters to the remote IrCOMM device. These parameters | |
294 | * must be sent before any data. | |
295 | */ | |
296 | int ircomm_tty_send_initial_parameters(struct ircomm_tty_cb *self) | |
297 | { | |
298 | IRDA_ASSERT(self != NULL, return -1;); | |
299 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); | |
300 | ||
6819bc2e | 301 | if (self->service_type & IRCOMM_3_WIRE_RAW) |
1da177e4 LT |
302 | return 0; |
303 | ||
6819bc2e YH |
304 | /* |
305 | * Set default values, but only if the application for some reason | |
1da177e4 LT |
306 | * haven't set them already |
307 | */ | |
955a9d20 JP |
308 | pr_debug("%s(), data-rate = %d\n", __func__ , |
309 | self->settings.data_rate); | |
1da177e4 LT |
310 | if (!self->settings.data_rate) |
311 | self->settings.data_rate = 9600; | |
955a9d20 JP |
312 | pr_debug("%s(), data-format = %d\n", __func__ , |
313 | self->settings.data_format); | |
1da177e4 LT |
314 | if (!self->settings.data_format) |
315 | self->settings.data_format = IRCOMM_WSIZE_8; /* 8N1 */ | |
316 | ||
955a9d20 JP |
317 | pr_debug("%s(), flow-control = %d\n", __func__ , |
318 | self->settings.flow_control); | |
1da177e4 LT |
319 | /*self->settings.flow_control = IRCOMM_RTS_CTS_IN|IRCOMM_RTS_CTS_OUT;*/ |
320 | ||
321 | /* Do not set delta values for the initial parameters */ | |
322 | self->settings.dte = IRCOMM_DTR | IRCOMM_RTS; | |
323 | ||
324 | /* Only send service type parameter when we are the client */ | |
325 | if (self->client) | |
326 | ircomm_param_request(self, IRCOMM_SERVICE_TYPE, FALSE); | |
327 | ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE); | |
328 | ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE); | |
6819bc2e | 329 | |
1da177e4 LT |
330 | /* For a 3 wire service, we just flush the last parameter and return */ |
331 | if (self->settings.service_type == IRCOMM_3_WIRE) { | |
332 | ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /* Only 9-wire service types continue here */ | |
337 | ircomm_param_request(self, IRCOMM_FLOW_CONTROL, FALSE); | |
338 | #if 0 | |
339 | ircomm_param_request(self, IRCOMM_XON_XOFF, FALSE); | |
340 | ircomm_param_request(self, IRCOMM_ENQ_ACK, FALSE); | |
6819bc2e | 341 | #endif |
1da177e4 LT |
342 | /* Notify peer that we are ready to receive data */ |
343 | ircomm_param_request(self, IRCOMM_DTE, TRUE); | |
6819bc2e | 344 | |
1da177e4 LT |
345 | return 0; |
346 | } | |
347 | ||
348 | /* | |
349 | * Function ircomm_tty_discovery_indication (discovery) | |
350 | * | |
351 | * Remote device is discovered, try query the remote IAS to see which | |
352 | * device it is, and which services it has. | |
353 | * | |
354 | */ | |
355 | static void ircomm_tty_discovery_indication(discinfo_t *discovery, | |
356 | DISCOVERY_MODE mode, | |
357 | void *priv) | |
358 | { | |
359 | struct ircomm_tty_cb *self; | |
360 | struct ircomm_tty_info info; | |
361 | ||
1da177e4 LT |
362 | /* Important note : |
363 | * We need to drop all passive discoveries. | |
364 | * The LSAP management of IrComm is deficient and doesn't deal | |
365 | * with the case of two instance connecting to each other | |
366 | * simultaneously (it will deadlock in LMP). | |
367 | * The proper fix would be to use the same technique as in IrNET, | |
368 | * to have one server socket and separate instances for the | |
369 | * connecting/connected socket. | |
370 | * The workaround is to drop passive discovery, which drastically | |
371 | * reduce the probability of this happening. | |
372 | * Jean II */ | |
373 | if(mode == DISCOVERY_PASSIVE) | |
374 | return; | |
375 | ||
376 | info.daddr = discovery->daddr; | |
377 | info.saddr = discovery->saddr; | |
378 | ||
ea110733 | 379 | self = priv; |
c310f099 RR |
380 | ircomm_tty_do_event(self, IRCOMM_TTY_DISCOVERY_INDICATION, |
381 | NULL, &info); | |
1da177e4 LT |
382 | } |
383 | ||
384 | /* | |
385 | * Function ircomm_tty_disconnect_indication (instance, sap, reason, skb) | |
386 | * | |
387 | * Link disconnected | |
388 | * | |
389 | */ | |
6819bc2e | 390 | void ircomm_tty_disconnect_indication(void *instance, void *sap, |
1da177e4 LT |
391 | LM_REASON reason, |
392 | struct sk_buff *skb) | |
393 | { | |
394 | struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance; | |
62f228ac | 395 | struct tty_struct *tty; |
1da177e4 | 396 | |
1da177e4 LT |
397 | IRDA_ASSERT(self != NULL, return;); |
398 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
399 | ||
62f228ac JS |
400 | tty = tty_port_tty_get(&self->port); |
401 | if (!tty) | |
1da177e4 LT |
402 | return; |
403 | ||
404 | /* This will stop control data transfers */ | |
405 | self->flow = FLOW_STOP; | |
406 | ||
407 | /* Stop data transfers */ | |
62f228ac | 408 | tty->hw_stopped = 1; |
1da177e4 | 409 | |
6819bc2e | 410 | ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL, |
1da177e4 | 411 | NULL); |
62f228ac | 412 | tty_kref_put(tty); |
1da177e4 LT |
413 | } |
414 | ||
415 | /* | |
416 | * Function ircomm_tty_getvalue_confirm (result, obj_id, value, priv) | |
417 | * | |
418 | * Got result from the IAS query we make | |
419 | * | |
420 | */ | |
6819bc2e YH |
421 | static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id, |
422 | struct ias_value *value, | |
1da177e4 LT |
423 | void *priv) |
424 | { | |
425 | struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) priv; | |
426 | ||
1da177e4 LT |
427 | IRDA_ASSERT(self != NULL, return;); |
428 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
429 | ||
430 | /* We probably don't need to make any more queries */ | |
431 | iriap_close(self->iriap); | |
432 | self->iriap = NULL; | |
433 | ||
434 | /* Check if request succeeded */ | |
435 | if (result != IAS_SUCCESS) { | |
955a9d20 | 436 | pr_debug("%s(), got NULL value!\n", __func__); |
1da177e4 LT |
437 | return; |
438 | } | |
439 | ||
440 | switch (value->type) { | |
6819bc2e | 441 | case IAS_OCT_SEQ: |
955a9d20 | 442 | pr_debug("%s(), got octet sequence\n", __func__); |
1da177e4 LT |
443 | |
444 | irda_param_extract_all(self, value->t.oct_seq, value->len, | |
445 | &ircomm_param_info); | |
446 | ||
6819bc2e | 447 | ircomm_tty_do_event(self, IRCOMM_TTY_GOT_PARAMETERS, NULL, |
1da177e4 LT |
448 | NULL); |
449 | break; | |
450 | case IAS_INTEGER: | |
6819bc2e | 451 | /* Got LSAP selector */ |
955a9d20 JP |
452 | pr_debug("%s(), got lsapsel = %d\n", __func__ , |
453 | value->t.integer); | |
1da177e4 LT |
454 | |
455 | if (value->t.integer == -1) { | |
955a9d20 | 456 | pr_debug("%s(), invalid value!\n", __func__); |
1da177e4 LT |
457 | } else |
458 | self->dlsap_sel = value->t.integer; | |
459 | ||
460 | ircomm_tty_do_event(self, IRCOMM_TTY_GOT_LSAPSEL, NULL, NULL); | |
461 | break; | |
462 | case IAS_MISSING: | |
955a9d20 | 463 | pr_debug("%s(), got IAS_MISSING\n", __func__); |
1da177e4 LT |
464 | break; |
465 | default: | |
955a9d20 | 466 | pr_debug("%s(), got unknown type!\n", __func__); |
1da177e4 LT |
467 | break; |
468 | } | |
469 | irias_delete_value(value); | |
470 | } | |
471 | ||
472 | /* | |
473 | * Function ircomm_tty_connect_confirm (instance, sap, qos, max_sdu_size, skb) | |
474 | * | |
475 | * Connection confirmed | |
476 | * | |
477 | */ | |
6819bc2e YH |
478 | void ircomm_tty_connect_confirm(void *instance, void *sap, |
479 | struct qos_info *qos, | |
480 | __u32 max_data_size, | |
481 | __u8 max_header_size, | |
1da177e4 LT |
482 | struct sk_buff *skb) |
483 | { | |
484 | struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance; | |
485 | ||
1da177e4 LT |
486 | IRDA_ASSERT(self != NULL, return;); |
487 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
488 | ||
489 | self->client = TRUE; | |
490 | self->max_data_size = max_data_size; | |
491 | self->max_header_size = max_header_size; | |
492 | self->flow = FLOW_START; | |
493 | ||
494 | ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_CONFIRM, NULL, NULL); | |
495 | ||
496 | /* No need to kfree_skb - see ircomm_ttp_connect_confirm() */ | |
497 | } | |
498 | ||
499 | /* | |
6819bc2e | 500 | * Function ircomm_tty_connect_indication (instance, sap, qos, max_sdu_size, |
1da177e4 LT |
501 | * skb) |
502 | * | |
503 | * we are discovered and being requested to connect by remote device ! | |
504 | * | |
505 | */ | |
6819bc2e YH |
506 | void ircomm_tty_connect_indication(void *instance, void *sap, |
507 | struct qos_info *qos, | |
1da177e4 | 508 | __u32 max_data_size, |
6819bc2e | 509 | __u8 max_header_size, |
1da177e4 LT |
510 | struct sk_buff *skb) |
511 | { | |
512 | struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance; | |
513 | int clen; | |
514 | ||
1da177e4 LT |
515 | IRDA_ASSERT(self != NULL, return;); |
516 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
517 | ||
518 | self->client = FALSE; | |
519 | self->max_data_size = max_data_size; | |
520 | self->max_header_size = max_header_size; | |
521 | self->flow = FLOW_START; | |
522 | ||
523 | clen = skb->data[0]; | |
524 | if (clen) | |
6819bc2e YH |
525 | irda_param_extract_all(self, skb->data+1, |
526 | IRDA_MIN(skb->len, clen), | |
1da177e4 LT |
527 | &ircomm_param_info); |
528 | ||
529 | ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_INDICATION, NULL, NULL); | |
530 | ||
531 | /* No need to kfree_skb - see ircomm_ttp_connect_indication() */ | |
532 | } | |
533 | ||
534 | /* | |
535 | * Function ircomm_tty_link_established (self) | |
536 | * | |
537 | * Called when the IrCOMM link is established | |
538 | * | |
539 | */ | |
540 | void ircomm_tty_link_established(struct ircomm_tty_cb *self) | |
541 | { | |
62f228ac JS |
542 | struct tty_struct *tty; |
543 | ||
1da177e4 LT |
544 | IRDA_ASSERT(self != NULL, return;); |
545 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
546 | ||
62f228ac JS |
547 | tty = tty_port_tty_get(&self->port); |
548 | if (!tty) | |
1da177e4 | 549 | return; |
6819bc2e | 550 | |
1da177e4 LT |
551 | del_timer(&self->watchdog_timer); |
552 | ||
6819bc2e | 553 | /* |
1da177e4 LT |
554 | * IrCOMM link is now up, and if we are not using hardware |
555 | * flow-control, then declare the hardware as running. Otherwise we | |
556 | * will have to wait for the peer device (DCE) to raise the CTS | |
6819bc2e | 557 | * line. |
1da177e4 | 558 | */ |
f21ec3d2 | 559 | if (tty_port_cts_enabled(&self->port) && |
849d5a99 | 560 | ((self->settings.dce & IRCOMM_CTS) == 0)) { |
955a9d20 | 561 | pr_debug("%s(), waiting for CTS ...\n", __func__); |
62f228ac | 562 | goto put; |
1da177e4 | 563 | } else { |
955a9d20 | 564 | pr_debug("%s(), starting hardware!\n", __func__); |
1da177e4 | 565 | |
62f228ac | 566 | tty->hw_stopped = 0; |
6819bc2e | 567 | |
1da177e4 | 568 | /* Wake up processes blocked on open */ |
a3cc9fcf | 569 | wake_up_interruptible(&self->port.open_wait); |
1da177e4 LT |
570 | } |
571 | ||
572 | schedule_work(&self->tqueue); | |
62f228ac JS |
573 | put: |
574 | tty_kref_put(tty); | |
1da177e4 LT |
575 | } |
576 | ||
577 | /* | |
578 | * Function ircomm_tty_start_watchdog_timer (self, timeout) | |
579 | * | |
6819bc2e YH |
580 | * Start the watchdog timer. This timer is used to make sure that any |
581 | * connection attempt is successful, and if not, we will retry after | |
1da177e4 LT |
582 | * the timeout |
583 | */ | |
584 | static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self, | |
585 | int timeout) | |
586 | { | |
587 | IRDA_ASSERT(self != NULL, return;); | |
588 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
589 | ||
590 | irda_start_timer(&self->watchdog_timer, timeout, (void *) self, | |
591 | ircomm_tty_watchdog_timer_expired); | |
592 | } | |
593 | ||
594 | /* | |
595 | * Function ircomm_tty_watchdog_timer_expired (data) | |
596 | * | |
597 | * Called when the connect procedure have taken to much time. | |
598 | * | |
599 | */ | |
600 | static void ircomm_tty_watchdog_timer_expired(void *data) | |
601 | { | |
602 | struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) data; | |
6819bc2e | 603 | |
1da177e4 LT |
604 | IRDA_ASSERT(self != NULL, return;); |
605 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
606 | ||
607 | ircomm_tty_do_event(self, IRCOMM_TTY_WD_TIMER_EXPIRED, NULL, NULL); | |
608 | } | |
609 | ||
610 | ||
611 | /* | |
612 | * Function ircomm_tty_do_event (self, event, skb) | |
613 | * | |
614 | * Process event | |
615 | * | |
616 | */ | |
617 | int ircomm_tty_do_event(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event, | |
6819bc2e | 618 | struct sk_buff *skb, struct ircomm_tty_info *info) |
1da177e4 LT |
619 | { |
620 | IRDA_ASSERT(self != NULL, return -1;); | |
621 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); | |
622 | ||
955a9d20 JP |
623 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
624 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
6819bc2e | 625 | |
1da177e4 LT |
626 | return (*state[self->state])(self, event, skb, info); |
627 | } | |
628 | ||
629 | /* | |
630 | * Function ircomm_tty_next_state (self, state) | |
631 | * | |
632 | * Switch state | |
633 | * | |
634 | */ | |
635 | static inline void ircomm_tty_next_state(struct ircomm_tty_cb *self, IRCOMM_TTY_STATE state) | |
636 | { | |
637 | /* | |
638 | IRDA_ASSERT(self != NULL, return;); | |
639 | IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); | |
640 | ||
955a9d20 JP |
641 | pr_debug("%s: next state=%s, service type=%d\n", __func__ , |
642 | ircomm_tty_state[self->state], self->service_type); | |
1da177e4 LT |
643 | */ |
644 | self->state = state; | |
645 | } | |
646 | ||
647 | /* | |
648 | * Function ircomm_tty_state_idle (self, event, skb, info) | |
649 | * | |
650 | * Just hanging around | |
651 | * | |
652 | */ | |
6819bc2e YH |
653 | static int ircomm_tty_state_idle(struct ircomm_tty_cb *self, |
654 | IRCOMM_TTY_EVENT event, | |
655 | struct sk_buff *skb, | |
1da177e4 LT |
656 | struct ircomm_tty_info *info) |
657 | { | |
658 | int ret = 0; | |
659 | ||
955a9d20 JP |
660 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
661 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
1da177e4 LT |
662 | switch (event) { |
663 | case IRCOMM_TTY_ATTACH_CABLE: | |
6819bc2e | 664 | /* Try to discover any remote devices */ |
1da177e4 LT |
665 | ircomm_tty_start_watchdog_timer(self, 3*HZ); |
666 | ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); | |
6819bc2e | 667 | |
1da177e4 LT |
668 | irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS); |
669 | break; | |
670 | case IRCOMM_TTY_DISCOVERY_INDICATION: | |
671 | self->daddr = info->daddr; | |
672 | self->saddr = info->saddr; | |
673 | ||
674 | if (self->iriap) { | |
6c91023d JP |
675 | net_warn_ratelimited("%s(), busy with a previous query\n", |
676 | __func__); | |
1da177e4 LT |
677 | return -EBUSY; |
678 | } | |
679 | ||
680 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, | |
681 | ircomm_tty_getvalue_confirm); | |
682 | ||
683 | iriap_getvaluebyclass_request(self->iriap, | |
684 | self->saddr, self->daddr, | |
685 | "IrDA:IrCOMM", "Parameters"); | |
6819bc2e | 686 | |
1da177e4 LT |
687 | ircomm_tty_start_watchdog_timer(self, 3*HZ); |
688 | ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS); | |
689 | break; | |
690 | case IRCOMM_TTY_CONNECT_INDICATION: | |
691 | del_timer(&self->watchdog_timer); | |
692 | ||
693 | /* Accept connection */ | |
694 | ircomm_connect_response(self->ircomm, NULL); | |
695 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
696 | break; | |
697 | case IRCOMM_TTY_WD_TIMER_EXPIRED: | |
698 | /* Just stay idle */ | |
699 | break; | |
700 | case IRCOMM_TTY_DETACH_CABLE: | |
701 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
702 | break; | |
703 | default: | |
955a9d20 JP |
704 | pr_debug("%s(), unknown event: %s\n", __func__ , |
705 | ircomm_tty_event[event]); | |
1da177e4 LT |
706 | ret = -EINVAL; |
707 | } | |
708 | return ret; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Function ircomm_tty_state_search (self, event, skb, info) | |
713 | * | |
714 | * Trying to discover an IrCOMM device | |
715 | * | |
716 | */ | |
6819bc2e YH |
717 | static int ircomm_tty_state_search(struct ircomm_tty_cb *self, |
718 | IRCOMM_TTY_EVENT event, | |
719 | struct sk_buff *skb, | |
1da177e4 LT |
720 | struct ircomm_tty_info *info) |
721 | { | |
722 | int ret = 0; | |
723 | ||
955a9d20 JP |
724 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
725 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
1da177e4 LT |
726 | |
727 | switch (event) { | |
728 | case IRCOMM_TTY_DISCOVERY_INDICATION: | |
729 | self->daddr = info->daddr; | |
730 | self->saddr = info->saddr; | |
731 | ||
732 | if (self->iriap) { | |
6c91023d JP |
733 | net_warn_ratelimited("%s(), busy with a previous query\n", |
734 | __func__); | |
1da177e4 LT |
735 | return -EBUSY; |
736 | } | |
6819bc2e | 737 | |
1da177e4 LT |
738 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, |
739 | ircomm_tty_getvalue_confirm); | |
6819bc2e | 740 | |
1da177e4 LT |
741 | if (self->service_type == IRCOMM_3_WIRE_RAW) { |
742 | iriap_getvaluebyclass_request(self->iriap, self->saddr, | |
6819bc2e | 743 | self->daddr, "IrLPT", |
1da177e4 LT |
744 | "IrDA:IrLMP:LsapSel"); |
745 | ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL); | |
746 | } else { | |
747 | iriap_getvaluebyclass_request(self->iriap, self->saddr, | |
6819bc2e YH |
748 | self->daddr, |
749 | "IrDA:IrCOMM", | |
1da177e4 LT |
750 | "Parameters"); |
751 | ||
752 | ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS); | |
753 | } | |
754 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
755 | break; | |
756 | case IRCOMM_TTY_CONNECT_INDICATION: | |
757 | del_timer(&self->watchdog_timer); | |
758 | ircomm_tty_ias_unregister(self); | |
759 | ||
760 | /* Accept connection */ | |
761 | ircomm_connect_response(self->ircomm, NULL); | |
762 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
763 | break; | |
764 | case IRCOMM_TTY_WD_TIMER_EXPIRED: | |
765 | #if 1 | |
766 | /* Give up */ | |
767 | #else | |
6819bc2e | 768 | /* Try to discover any remote devices */ |
1da177e4 LT |
769 | ircomm_tty_start_watchdog_timer(self, 3*HZ); |
770 | irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS); | |
771 | #endif | |
772 | break; | |
773 | case IRCOMM_TTY_DETACH_CABLE: | |
774 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
775 | break; | |
776 | default: | |
955a9d20 JP |
777 | pr_debug("%s(), unknown event: %s\n", __func__ , |
778 | ircomm_tty_event[event]); | |
1da177e4 LT |
779 | ret = -EINVAL; |
780 | } | |
781 | return ret; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Function ircomm_tty_state_query (self, event, skb, info) | |
786 | * | |
787 | * Querying the remote LM-IAS for IrCOMM parameters | |
788 | * | |
789 | */ | |
6819bc2e YH |
790 | static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self, |
791 | IRCOMM_TTY_EVENT event, | |
792 | struct sk_buff *skb, | |
1da177e4 LT |
793 | struct ircomm_tty_info *info) |
794 | { | |
795 | int ret = 0; | |
796 | ||
955a9d20 JP |
797 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
798 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
1da177e4 LT |
799 | |
800 | switch (event) { | |
801 | case IRCOMM_TTY_GOT_PARAMETERS: | |
802 | if (self->iriap) { | |
6c91023d JP |
803 | net_warn_ratelimited("%s(), busy with a previous query\n", |
804 | __func__); | |
1da177e4 LT |
805 | return -EBUSY; |
806 | } | |
6819bc2e | 807 | |
1da177e4 LT |
808 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, |
809 | ircomm_tty_getvalue_confirm); | |
810 | ||
6819bc2e YH |
811 | iriap_getvaluebyclass_request(self->iriap, self->saddr, |
812 | self->daddr, "IrDA:IrCOMM", | |
1da177e4 LT |
813 | "IrDA:TinyTP:LsapSel"); |
814 | ||
815 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
816 | ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL); | |
817 | break; | |
818 | case IRCOMM_TTY_WD_TIMER_EXPIRED: | |
819 | /* Go back to search mode */ | |
820 | ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); | |
6819bc2e | 821 | ircomm_tty_start_watchdog_timer(self, 3*HZ); |
1da177e4 LT |
822 | break; |
823 | case IRCOMM_TTY_CONNECT_INDICATION: | |
824 | del_timer(&self->watchdog_timer); | |
825 | ircomm_tty_ias_unregister(self); | |
826 | ||
827 | /* Accept connection */ | |
828 | ircomm_connect_response(self->ircomm, NULL); | |
829 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
830 | break; | |
831 | case IRCOMM_TTY_DETACH_CABLE: | |
832 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
833 | break; | |
834 | default: | |
955a9d20 JP |
835 | pr_debug("%s(), unknown event: %s\n", __func__ , |
836 | ircomm_tty_event[event]); | |
1da177e4 LT |
837 | ret = -EINVAL; |
838 | } | |
839 | return ret; | |
840 | } | |
841 | ||
842 | /* | |
843 | * Function ircomm_tty_state_query_lsap_sel (self, event, skb, info) | |
844 | * | |
845 | * Query remote LM-IAS for the LSAP selector which we can connect to | |
846 | * | |
847 | */ | |
6819bc2e YH |
848 | static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self, |
849 | IRCOMM_TTY_EVENT event, | |
850 | struct sk_buff *skb, | |
1da177e4 LT |
851 | struct ircomm_tty_info *info) |
852 | { | |
853 | int ret = 0; | |
854 | ||
955a9d20 JP |
855 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
856 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
1da177e4 LT |
857 | |
858 | switch (event) { | |
859 | case IRCOMM_TTY_GOT_LSAPSEL: | |
860 | /* Connect to remote device */ | |
861 | ret = ircomm_connect_request(self->ircomm, self->dlsap_sel, | |
6819bc2e | 862 | self->saddr, self->daddr, |
1da177e4 LT |
863 | NULL, self->service_type); |
864 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
865 | ircomm_tty_next_state(self, IRCOMM_TTY_SETUP); | |
866 | break; | |
867 | case IRCOMM_TTY_WD_TIMER_EXPIRED: | |
868 | /* Go back to search mode */ | |
869 | ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); | |
870 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
871 | break; | |
872 | case IRCOMM_TTY_CONNECT_INDICATION: | |
873 | del_timer(&self->watchdog_timer); | |
874 | ircomm_tty_ias_unregister(self); | |
875 | ||
876 | /* Accept connection */ | |
877 | ircomm_connect_response(self->ircomm, NULL); | |
878 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
879 | break; | |
880 | case IRCOMM_TTY_DETACH_CABLE: | |
881 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
882 | break; | |
883 | default: | |
955a9d20 JP |
884 | pr_debug("%s(), unknown event: %s\n", __func__ , |
885 | ircomm_tty_event[event]); | |
1da177e4 LT |
886 | ret = -EINVAL; |
887 | } | |
888 | return ret; | |
889 | } | |
890 | ||
891 | /* | |
892 | * Function ircomm_tty_state_setup (self, event, skb, info) | |
893 | * | |
894 | * Trying to connect | |
895 | * | |
896 | */ | |
6819bc2e YH |
897 | static int ircomm_tty_state_setup(struct ircomm_tty_cb *self, |
898 | IRCOMM_TTY_EVENT event, | |
899 | struct sk_buff *skb, | |
1da177e4 LT |
900 | struct ircomm_tty_info *info) |
901 | { | |
902 | int ret = 0; | |
903 | ||
955a9d20 JP |
904 | pr_debug("%s: state=%s, event=%s\n", __func__ , |
905 | ircomm_tty_state[self->state], ircomm_tty_event[event]); | |
1da177e4 LT |
906 | |
907 | switch (event) { | |
908 | case IRCOMM_TTY_CONNECT_CONFIRM: | |
909 | del_timer(&self->watchdog_timer); | |
910 | ircomm_tty_ias_unregister(self); | |
6819bc2e YH |
911 | |
912 | /* | |
1da177e4 | 913 | * Send initial parameters. This will also send out queued |
6819bc2e | 914 | * parameters waiting for the connection to come up |
1da177e4 LT |
915 | */ |
916 | ircomm_tty_send_initial_parameters(self); | |
917 | ircomm_tty_link_established(self); | |
918 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
919 | break; | |
920 | case IRCOMM_TTY_CONNECT_INDICATION: | |
921 | del_timer(&self->watchdog_timer); | |
922 | ircomm_tty_ias_unregister(self); | |
6819bc2e | 923 | |
1da177e4 LT |
924 | /* Accept connection */ |
925 | ircomm_connect_response(self->ircomm, NULL); | |
926 | ircomm_tty_next_state(self, IRCOMM_TTY_READY); | |
927 | break; | |
928 | case IRCOMM_TTY_WD_TIMER_EXPIRED: | |
929 | /* Go back to search mode */ | |
930 | ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); | |
931 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
932 | break; | |
933 | case IRCOMM_TTY_DETACH_CABLE: | |
934 | /* ircomm_disconnect_request(self->ircomm, NULL); */ | |
935 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
936 | break; | |
937 | default: | |
955a9d20 JP |
938 | pr_debug("%s(), unknown event: %s\n", __func__ , |
939 | ircomm_tty_event[event]); | |
1da177e4 LT |
940 | ret = -EINVAL; |
941 | } | |
942 | return ret; | |
943 | } | |
944 | ||
945 | /* | |
946 | * Function ircomm_tty_state_ready (self, event, skb, info) | |
947 | * | |
948 | * IrCOMM is now connected | |
949 | * | |
950 | */ | |
6819bc2e YH |
951 | static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, |
952 | IRCOMM_TTY_EVENT event, | |
953 | struct sk_buff *skb, | |
1da177e4 LT |
954 | struct ircomm_tty_info *info) |
955 | { | |
956 | int ret = 0; | |
957 | ||
958 | switch (event) { | |
959 | case IRCOMM_TTY_DATA_REQUEST: | |
960 | ret = ircomm_data_request(self->ircomm, skb); | |
6819bc2e | 961 | break; |
1da177e4 LT |
962 | case IRCOMM_TTY_DETACH_CABLE: |
963 | ircomm_disconnect_request(self->ircomm, NULL); | |
964 | ircomm_tty_next_state(self, IRCOMM_TTY_IDLE); | |
965 | break; | |
966 | case IRCOMM_TTY_DISCONNECT_INDICATION: | |
967 | ircomm_tty_ias_register(self); | |
968 | ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); | |
969 | ircomm_tty_start_watchdog_timer(self, 3*HZ); | |
970 | ||
2d68655d | 971 | if (tty_port_check_carrier(&self->port)) { |
1da177e4 LT |
972 | /* Drop carrier */ |
973 | self->settings.dce = IRCOMM_DELTA_CD; | |
974 | ircomm_tty_check_modem_status(self); | |
975 | } else { | |
955a9d20 | 976 | pr_debug("%s(), hanging up!\n", __func__); |
aa27a094 | 977 | tty_port_tty_hangup(&self->port, false); |
1da177e4 LT |
978 | } |
979 | break; | |
980 | default: | |
955a9d20 JP |
981 | pr_debug("%s(), unknown event: %s\n", __func__ , |
982 | ircomm_tty_event[event]); | |
1da177e4 LT |
983 | ret = -EINVAL; |
984 | } | |
985 | return ret; | |
986 | } | |
987 |