source: mainline/uspace/lib/c/generic/devman.c@ 39330200

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 39330200 was b7fd2a0, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Use errno_t in all uspace and kernel code.

Change type of every variable, parameter and return value that holds an
<errno.h> constant to either errno_t (the usual case), or sys_errno_t
(some places in kernel). This is for the purpose of self-documentation,
as well as for type-checking with a bit of type definition hackery.

Although this is a massive commit, it is a simple text replacement, and thus
is very easy to verify. Simply do the following:

`
git checkout <this commit's hash>
git reset HEAD
git add .
tools/srepl '\berrno_t\b' int
git add .
tools/srepl '\bsys_errno_t\b' sysarg_t
git reset
git diff
`

While this doesn't ensure that the replacements are correct, it does ensure
that the commit doesn't do anything except those replacements. Since errno_t
is typedef'd to int in the usual case (and sys_errno_t to sysarg_t), even if
incorrect, this commit cannot change behavior.
  • Property mode set to 100644
File size: 17.5 KB
Line 
1/*
2 * Copyright (c) 2007 Josef Cejka
3 * Copyright (c) 2013 Jiri Svoboda
4 * Copyright (c) 2010 Lenka Trochtova
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * - The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/** @addtogroup libc
32 * @{
33 */
34/** @file
35 */
36
37#include <adt/list.h>
38#include <str.h>
39#include <ipc/services.h>
40#include <ns.h>
41#include <ipc/devman.h>
42#include <devman.h>
43#include <fibril_synch.h>
44#include <async.h>
45#include <errno.h>
46#include <stdlib.h>
47
48static FIBRIL_MUTEX_INITIALIZE(devman_driver_block_mutex);
49static FIBRIL_MUTEX_INITIALIZE(devman_client_block_mutex);
50
51static FIBRIL_MUTEX_INITIALIZE(devman_driver_mutex);
52static FIBRIL_MUTEX_INITIALIZE(devman_client_mutex);
53
54static async_sess_t *devman_driver_block_sess = NULL;
55static async_sess_t *devman_client_block_sess = NULL;
56
57static async_sess_t *devman_driver_sess = NULL;
58static async_sess_t *devman_client_sess = NULL;
59
60static void clone_session(fibril_mutex_t *mtx, async_sess_t *src,
61 async_sess_t **dst)
62{
63 fibril_mutex_lock(mtx);
64
65 if ((*dst == NULL) && (src != NULL))
66 *dst = src;
67
68 fibril_mutex_unlock(mtx);
69}
70
71/** Start an async exchange on the devman session (blocking).
72 *
73 * @param iface Device manager interface to choose
74 *
75 * @return New exchange.
76 *
77 */
78async_exch_t *devman_exchange_begin_blocking(iface_t iface)
79{
80 switch (iface) {
81 case INTERFACE_DDF_DRIVER:
82 fibril_mutex_lock(&devman_driver_block_mutex);
83
84 while (devman_driver_block_sess == NULL) {
85 clone_session(&devman_driver_mutex, devman_driver_sess,
86 &devman_driver_block_sess);
87
88 if (devman_driver_block_sess == NULL)
89 devman_driver_block_sess =
90 service_connect_blocking(SERVICE_DEVMAN,
91 INTERFACE_DDF_DRIVER, 0);
92 }
93
94 fibril_mutex_unlock(&devman_driver_block_mutex);
95
96 clone_session(&devman_driver_mutex, devman_driver_block_sess,
97 &devman_driver_sess);
98
99 return async_exchange_begin(devman_driver_block_sess);
100 case INTERFACE_DDF_CLIENT:
101 fibril_mutex_lock(&devman_client_block_mutex);
102
103 while (devman_client_block_sess == NULL) {
104 clone_session(&devman_client_mutex, devman_client_sess,
105 &devman_client_block_sess);
106
107 if (devman_client_block_sess == NULL)
108 devman_client_block_sess =
109 service_connect_blocking(SERVICE_DEVMAN,
110 INTERFACE_DDF_CLIENT, 0);
111 }
112
113 fibril_mutex_unlock(&devman_client_block_mutex);
114
115 clone_session(&devman_client_mutex, devman_client_block_sess,
116 &devman_client_sess);
117
118 return async_exchange_begin(devman_client_block_sess);
119 default:
120 return NULL;
121 }
122}
123
124/** Start an async exchange on the devman session.
125 *
126 * @param iface Device manager interface to choose
127 *
128 * @return New exchange.
129 *
130 */
131async_exch_t *devman_exchange_begin(iface_t iface)
132{
133 switch (iface) {
134 case INTERFACE_DDF_DRIVER:
135 fibril_mutex_lock(&devman_driver_mutex);
136
137 if (devman_driver_sess == NULL)
138 devman_driver_sess =
139 service_connect(SERVICE_DEVMAN,
140 INTERFACE_DDF_DRIVER, 0);
141
142 fibril_mutex_unlock(&devman_driver_mutex);
143
144 if (devman_driver_sess == NULL)
145 return NULL;
146
147 return async_exchange_begin(devman_driver_sess);
148 case INTERFACE_DDF_CLIENT:
149 fibril_mutex_lock(&devman_client_mutex);
150
151 if (devman_client_sess == NULL)
152 devman_client_sess =
153 service_connect(SERVICE_DEVMAN,
154 INTERFACE_DDF_CLIENT, 0);
155
156 fibril_mutex_unlock(&devman_client_mutex);
157
158 if (devman_client_sess == NULL)
159 return NULL;
160
161 return async_exchange_begin(devman_client_sess);
162 default:
163 return NULL;
164 }
165}
166
167/** Finish an async exchange on the devman session.
168 *
169 * @param exch Exchange to be finished.
170 *
171 */
172void devman_exchange_end(async_exch_t *exch)
173{
174 async_exchange_end(exch);
175}
176
177/** Register running driver with device manager. */
178errno_t devman_driver_register(const char *name)
179{
180 async_exch_t *exch = devman_exchange_begin_blocking(INTERFACE_DDF_DRIVER);
181
182 ipc_call_t answer;
183 aid_t req = async_send_2(exch, DEVMAN_DRIVER_REGISTER, 0, 0, &answer);
184 errno_t retval = async_data_write_start(exch, name, str_size(name));
185
186 devman_exchange_end(exch);
187
188 if (retval != EOK) {
189 async_forget(req);
190 return retval;
191 }
192
193 exch = devman_exchange_begin(INTERFACE_DDF_DRIVER);
194 async_connect_to_me(exch, 0, 0, 0);
195 devman_exchange_end(exch);
196
197 async_wait_for(req, &retval);
198 return retval;
199}
200
201/** Add function to a device.
202 *
203 * Request devman to add a new function to the specified device owned by
204 * this driver task.
205 *
206 * @param name Name of the new function
207 * @param ftype Function type, fun_inner or fun_exposed
208 * @param match_ids Match IDs (should be empty for fun_exposed)
209 * @param devh Devman handle of the device
210 * @param funh Place to store handle of the new function
211 *
212 * @return EOK on success or an error code.
213 *
214 */
215errno_t devman_add_function(const char *name, fun_type_t ftype,
216 match_id_list_t *match_ids, devman_handle_t devh, devman_handle_t *funh)
217{
218 unsigned long match_count = list_count(&match_ids->ids);
219 async_exch_t *exch = devman_exchange_begin_blocking(INTERFACE_DDF_DRIVER);
220
221 ipc_call_t answer;
222 aid_t req = async_send_3(exch, DEVMAN_ADD_FUNCTION, (sysarg_t) ftype,
223 devh, match_count, &answer);
224 errno_t retval = async_data_write_start(exch, name, str_size(name));
225 if (retval != EOK) {
226 devman_exchange_end(exch);
227 async_forget(req);
228 return retval;
229 }
230
231 list_foreach(match_ids->ids, link, match_id_t, match_id) {
232 ipc_call_t answer2;
233 aid_t req2 = async_send_1(exch, DEVMAN_ADD_MATCH_ID,
234 match_id->score, &answer2);
235 retval = async_data_write_start(exch, match_id->id,
236 str_size(match_id->id));
237 if (retval != EOK) {
238 devman_exchange_end(exch);
239 async_forget(req2);
240 async_forget(req);
241 return retval;
242 }
243
244 async_wait_for(req2, &retval);
245 if (retval != EOK) {
246 devman_exchange_end(exch);
247 async_forget(req);
248 return retval;
249 }
250 }
251
252 devman_exchange_end(exch);
253
254 async_wait_for(req, &retval);
255 if (retval == EOK) {
256 if (funh != NULL)
257 *funh = (int) IPC_GET_ARG1(answer);
258 } else {
259 if (funh != NULL)
260 *funh = -1;
261 }
262
263 return retval;
264}
265
266errno_t devman_add_device_to_category(devman_handle_t devman_handle,
267 const char *cat_name)
268{
269 async_exch_t *exch = devman_exchange_begin_blocking(INTERFACE_DDF_DRIVER);
270
271 ipc_call_t answer;
272 aid_t req = async_send_1(exch, DEVMAN_ADD_DEVICE_TO_CATEGORY,
273 devman_handle, &answer);
274 errno_t retval = async_data_write_start(exch, cat_name,
275 str_size(cat_name));
276
277 devman_exchange_end(exch);
278
279 if (retval != EOK) {
280 async_forget(req);
281 return retval;
282 }
283
284 async_wait_for(req, &retval);
285 return retval;
286}
287
288async_sess_t *devman_device_connect(devman_handle_t handle, unsigned int flags)
289{
290 async_sess_t *sess;
291
292 if (flags & IPC_FLAG_BLOCKING)
293 sess = service_connect_blocking(SERVICE_DEVMAN,
294 INTERFACE_DEVMAN_DEVICE, handle);
295 else
296 sess = service_connect(SERVICE_DEVMAN,
297 INTERFACE_DEVMAN_DEVICE, handle);
298
299 return sess;
300}
301
302/** Remove function from device.
303 *
304 * Request devman to remove function owned by this driver task.
305 * @param funh Devman handle of the function
306 *
307 * @return EOK on success or an error code.
308 */
309errno_t devman_remove_function(devman_handle_t funh)
310{
311 async_exch_t *exch;
312 errno_t retval;
313
314 exch = devman_exchange_begin_blocking(INTERFACE_DDF_DRIVER);
315 retval = async_req_1_0(exch, DEVMAN_REMOVE_FUNCTION, (sysarg_t) funh);
316 devman_exchange_end(exch);
317
318 return retval;
319}
320
321errno_t devman_drv_fun_online(devman_handle_t funh)
322{
323 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_DRIVER);
324 if (exch == NULL)
325 return ENOMEM;
326
327 errno_t retval = async_req_1_0(exch, DEVMAN_DRV_FUN_ONLINE, funh);
328
329 devman_exchange_end(exch);
330 return retval;
331}
332
333errno_t devman_drv_fun_offline(devman_handle_t funh)
334{
335 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_DRIVER);
336 if (exch == NULL)
337 return ENOMEM;
338
339 errno_t retval = async_req_1_0(exch, DEVMAN_DRV_FUN_OFFLINE, funh);
340
341 devman_exchange_end(exch);
342 return retval;
343}
344
345async_sess_t *devman_parent_device_connect(devman_handle_t handle,
346 unsigned int flags)
347{
348 async_sess_t *sess;
349
350 if (flags & IPC_FLAG_BLOCKING)
351 sess = service_connect_blocking(SERVICE_DEVMAN,
352 INTERFACE_DEVMAN_PARENT, handle);
353 else
354 sess = service_connect_blocking(SERVICE_DEVMAN,
355 INTERFACE_DEVMAN_PARENT, handle);
356
357 return sess;
358}
359
360errno_t devman_fun_get_handle(const char *pathname, devman_handle_t *handle,
361 unsigned int flags)
362{
363 async_exch_t *exch;
364
365 if (flags & IPC_FLAG_BLOCKING)
366 exch = devman_exchange_begin_blocking(INTERFACE_DDF_CLIENT);
367 else {
368 exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
369 if (exch == NULL)
370 return ENOMEM;
371 }
372
373 ipc_call_t answer;
374 aid_t req = async_send_2(exch, DEVMAN_DEVICE_GET_HANDLE, flags, 0,
375 &answer);
376 errno_t retval = async_data_write_start(exch, pathname,
377 str_size(pathname));
378
379 devman_exchange_end(exch);
380
381 if (retval != EOK) {
382 async_forget(req);
383 return retval;
384 }
385
386 async_wait_for(req, &retval);
387
388 if (retval != EOK) {
389 if (handle != NULL)
390 *handle = (devman_handle_t) -1;
391
392 return retval;
393 }
394
395 if (handle != NULL)
396 *handle = (devman_handle_t) IPC_GET_ARG1(answer);
397
398 return retval;
399}
400
401static errno_t devman_get_str_internal(sysarg_t method, sysarg_t arg1,
402 sysarg_t arg2, sysarg_t *r1, char *buf, size_t buf_size)
403{
404 async_exch_t *exch;
405 ipc_call_t dreply;
406 size_t act_size;
407 errno_t dretval;
408
409 exch = devman_exchange_begin_blocking(INTERFACE_DDF_CLIENT);
410
411 ipc_call_t answer;
412 aid_t req = async_send_2(exch, method, arg1, arg2, &answer);
413 aid_t dreq = async_data_read(exch, buf, buf_size - 1, &dreply);
414 async_wait_for(dreq, &dretval);
415
416 devman_exchange_end(exch);
417
418 if (dretval != EOK) {
419 async_forget(req);
420 return dretval;
421 }
422
423 errno_t retval;
424 async_wait_for(req, &retval);
425
426 if (retval != EOK) {
427 return retval;
428 }
429
430 if (r1 != NULL)
431 *r1 = IPC_GET_ARG1(answer);
432 act_size = IPC_GET_ARG2(dreply);
433 assert(act_size <= buf_size - 1);
434 buf[act_size] = '\0';
435
436 return EOK;
437}
438
439errno_t devman_fun_get_path(devman_handle_t handle, char *buf, size_t buf_size)
440{
441 return devman_get_str_internal(DEVMAN_FUN_GET_PATH, handle, 0, NULL,
442 buf, buf_size);
443}
444
445errno_t devman_fun_get_match_id(devman_handle_t handle, size_t index, char *buf,
446 size_t buf_size, unsigned int *rscore)
447{
448 errno_t rc;
449 sysarg_t score = 0;
450
451 rc = devman_get_str_internal(DEVMAN_FUN_GET_MATCH_ID, handle, index,
452 &score, buf, buf_size);
453 if (rc != EOK)
454 return rc;
455
456 *rscore = score;
457 return rc;
458}
459
460errno_t devman_fun_get_name(devman_handle_t handle, char *buf, size_t buf_size)
461{
462 return devman_get_str_internal(DEVMAN_FUN_GET_NAME, handle, 0, NULL,
463 buf, buf_size);
464}
465
466errno_t devman_fun_get_driver_name(devman_handle_t handle, char *buf, size_t buf_size)
467{
468 return devman_get_str_internal(DEVMAN_FUN_GET_DRIVER_NAME, handle, 0,
469 NULL, buf, buf_size);
470}
471
472errno_t devman_fun_online(devman_handle_t funh)
473{
474 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
475 if (exch == NULL)
476 return ENOMEM;
477
478 errno_t retval = async_req_1_0(exch, DEVMAN_FUN_ONLINE, funh);
479
480 devman_exchange_end(exch);
481 return retval;
482}
483
484errno_t devman_fun_offline(devman_handle_t funh)
485{
486 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
487 if (exch == NULL)
488 return ENOMEM;
489
490 errno_t retval = async_req_1_0(exch, DEVMAN_FUN_OFFLINE, funh);
491
492 devman_exchange_end(exch);
493 return retval;
494}
495
496static errno_t devman_get_handles_once(sysarg_t method, sysarg_t arg1,
497 devman_handle_t *handle_buf, size_t buf_size, size_t *act_size)
498{
499 async_exch_t *exch = devman_exchange_begin_blocking(INTERFACE_DDF_CLIENT);
500
501 ipc_call_t answer;
502 aid_t req = async_send_1(exch, method, arg1, &answer);
503 errno_t rc = async_data_read_start(exch, handle_buf, buf_size);
504
505 devman_exchange_end(exch);
506
507 if (rc != EOK) {
508 async_forget(req);
509 return rc;
510 }
511
512 errno_t retval;
513 async_wait_for(req, &retval);
514
515 if (retval != EOK) {
516 return retval;
517 }
518
519 *act_size = IPC_GET_ARG1(answer);
520 return EOK;
521}
522
523/** Get list of handles.
524 *
525 * Returns an allocated array of handles.
526 *
527 * @param method IPC method
528 * @param arg1 IPC argument 1
529 * @param data Place to store pointer to array of handles
530 * @param count Place to store number of handles
531 * @return EOK on success or an error code
532 */
533static errno_t devman_get_handles_internal(sysarg_t method, sysarg_t arg1,
534 devman_handle_t **data, size_t *count)
535{
536 devman_handle_t *handles;
537 size_t act_size;
538 size_t alloc_size;
539 errno_t rc;
540
541 *data = NULL;
542 act_size = 0; /* silence warning */
543
544 rc = devman_get_handles_once(method, arg1, NULL, 0,
545 &act_size);
546 if (rc != EOK)
547 return rc;
548
549 alloc_size = act_size;
550 handles = malloc(alloc_size);
551 if (handles == NULL)
552 return ENOMEM;
553
554 while (true) {
555 rc = devman_get_handles_once(method, arg1, handles, alloc_size,
556 &act_size);
557 if (rc != EOK)
558 return rc;
559
560 if (act_size <= alloc_size)
561 break;
562
563 alloc_size *= 2;
564 free(handles);
565
566 handles = malloc(alloc_size);
567 if (handles == NULL)
568 return ENOMEM;
569 }
570
571 *count = act_size / sizeof(devman_handle_t);
572 *data = handles;
573 return EOK;
574}
575
576errno_t devman_fun_get_child(devman_handle_t funh, devman_handle_t *devh)
577{
578 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
579 if (exch == NULL)
580 return ENOMEM;
581
582 errno_t retval = async_req_1_1(exch, DEVMAN_FUN_GET_CHILD,
583 funh, devh);
584
585 devman_exchange_end(exch);
586 return retval;
587}
588
589errno_t devman_dev_get_functions(devman_handle_t devh, devman_handle_t **funcs,
590 size_t *count)
591{
592 return devman_get_handles_internal(DEVMAN_DEV_GET_FUNCTIONS,
593 devh, funcs, count);
594}
595
596errno_t devman_dev_get_parent(devman_handle_t devh, devman_handle_t *funh)
597{
598 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
599 if (exch == NULL)
600 return ENOMEM;
601
602 errno_t retval = async_req_1_1(exch, DEVMAN_DEV_GET_PARENT,
603 devh, funh);
604
605 devman_exchange_end(exch);
606 return retval;
607}
608
609errno_t devman_fun_sid_to_handle(service_id_t sid, devman_handle_t *handle)
610{
611 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
612 if (exch == NULL)
613 return ENOMEM;
614
615 errno_t retval = async_req_1_1(exch, DEVMAN_FUN_SID_TO_HANDLE,
616 sid, handle);
617
618 devman_exchange_end(exch);
619 return retval;
620}
621
622errno_t devman_get_drivers(devman_handle_t **drvs,
623 size_t *count)
624{
625 return devman_get_handles_internal(DEVMAN_GET_DRIVERS, 0, drvs, count);
626}
627
628errno_t devman_driver_get_devices(devman_handle_t drvh, devman_handle_t **devs,
629 size_t *count)
630{
631 return devman_get_handles_internal(DEVMAN_DRIVER_GET_DEVICES,
632 drvh, devs, count);
633}
634
635errno_t devman_driver_get_handle(const char *drvname, devman_handle_t *handle)
636{
637 async_exch_t *exch;
638
639 exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
640 if (exch == NULL)
641 return ENOMEM;
642
643 ipc_call_t answer;
644 aid_t req = async_send_0(exch, DEVMAN_DRIVER_GET_HANDLE, &answer);
645 errno_t retval = async_data_write_start(exch, drvname,
646 str_size(drvname));
647
648 devman_exchange_end(exch);
649
650 if (retval != EOK) {
651 async_forget(req);
652 return retval;
653 }
654
655 async_wait_for(req, &retval);
656
657 if (retval != EOK) {
658 if (handle != NULL)
659 *handle = (devman_handle_t) -1;
660
661 return retval;
662 }
663
664 if (handle != NULL)
665 *handle = (devman_handle_t) IPC_GET_ARG1(answer);
666
667 return retval;
668}
669
670errno_t devman_driver_get_match_id(devman_handle_t handle, size_t index, char *buf,
671 size_t buf_size, unsigned int *rscore)
672{
673 errno_t rc;
674 sysarg_t score = 0;
675
676 rc = devman_get_str_internal(DEVMAN_DRIVER_GET_MATCH_ID, handle, index,
677 &score, buf, buf_size);
678 if (rc != EOK)
679 return rc;
680
681 *rscore = score;
682 return rc;
683}
684
685errno_t devman_driver_get_name(devman_handle_t handle, char *buf, size_t buf_size)
686{
687 return devman_get_str_internal(DEVMAN_DRIVER_GET_NAME, handle, 0, NULL,
688 buf, buf_size);
689}
690
691errno_t devman_driver_get_state(devman_handle_t drvh, driver_state_t *rstate)
692{
693 sysarg_t state;
694 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
695 if (exch == NULL)
696 return ENOMEM;
697
698 errno_t rc = async_req_1_1(exch, DEVMAN_DRIVER_GET_STATE, drvh,
699 &state);
700
701 devman_exchange_end(exch);
702 if (rc != EOK)
703 return rc;
704
705 *rstate = state;
706 return rc;
707}
708
709errno_t devman_driver_load(devman_handle_t drvh)
710{
711 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
712 if (exch == NULL)
713 return ENOMEM;
714
715 errno_t rc = async_req_1_0(exch, DEVMAN_DRIVER_LOAD, drvh);
716
717 devman_exchange_end(exch);
718 return rc;
719}
720
721errno_t devman_driver_unload(devman_handle_t drvh)
722{
723 async_exch_t *exch = devman_exchange_begin(INTERFACE_DDF_CLIENT);
724 if (exch == NULL)
725 return ENOMEM;
726
727 errno_t rc = async_req_1_0(exch, DEVMAN_DRIVER_UNLOAD, drvh);
728
729 devman_exchange_end(exch);
730 return rc;
731}
732
733/** @}
734 */
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