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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * compat ioctls for control API | |
3 | * | |
4 | * Copyright (c) by Takashi Iwai <tiwai@suse.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* this file included from control.c */ | |
22 | ||
23 | #include <linux/compat.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 | 25 | |
82e9bae6 | 26 | struct snd_ctl_elem_list32 { |
1da177e4 LT |
27 | u32 offset; |
28 | u32 space; | |
29 | u32 used; | |
30 | u32 count; | |
31 | u32 pids; | |
32 | unsigned char reserved[50]; | |
33 | } /* don't set packed attribute here */; | |
34 | ||
82e9bae6 TI |
35 | static int snd_ctl_elem_list_compat(struct snd_card *card, |
36 | struct snd_ctl_elem_list32 __user *data32) | |
1da177e4 | 37 | { |
82e9bae6 | 38 | struct snd_ctl_elem_list __user *data; |
1da177e4 LT |
39 | compat_caddr_t ptr; |
40 | int err; | |
41 | ||
42 | data = compat_alloc_user_space(sizeof(*data)); | |
43 | ||
44 | /* offset, space, used, count */ | |
45 | if (copy_in_user(data, data32, 4 * sizeof(u32))) | |
46 | return -EFAULT; | |
47 | /* pids */ | |
48 | if (get_user(ptr, &data32->pids) || | |
49 | put_user(compat_ptr(ptr), &data->pids)) | |
50 | return -EFAULT; | |
51 | err = snd_ctl_elem_list(card, data); | |
52 | if (err < 0) | |
53 | return err; | |
54 | /* copy the result */ | |
55 | if (copy_in_user(data32, data, 4 * sizeof(u32))) | |
56 | return -EFAULT; | |
57 | return 0; | |
58 | } | |
59 | ||
60 | /* | |
61 | * control element info | |
62 | * it uses union, so the things are not easy.. | |
63 | */ | |
64 | ||
82e9bae6 TI |
65 | struct snd_ctl_elem_info32 { |
66 | struct snd_ctl_elem_id id; // the size of struct is same | |
1da177e4 LT |
67 | s32 type; |
68 | u32 access; | |
69 | u32 count; | |
70 | s32 owner; | |
71 | union { | |
72 | struct { | |
73 | s32 min; | |
74 | s32 max; | |
75 | s32 step; | |
76 | } integer; | |
77 | struct { | |
78 | u64 min; | |
79 | u64 max; | |
80 | u64 step; | |
81 | } integer64; | |
82 | struct { | |
83 | u32 items; | |
84 | u32 item; | |
85 | char name[64]; | |
8d448162 CL |
86 | u64 names_ptr; |
87 | u32 names_length; | |
1da177e4 LT |
88 | } enumerated; |
89 | unsigned char reserved[128]; | |
90 | } value; | |
91 | unsigned char reserved[64]; | |
92 | } __attribute__((packed)); | |
93 | ||
82e9bae6 TI |
94 | static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl, |
95 | struct snd_ctl_elem_info32 __user *data32) | |
1da177e4 | 96 | { |
82e9bae6 | 97 | struct snd_ctl_elem_info *data; |
1da177e4 LT |
98 | int err; |
99 | ||
ca2c0966 | 100 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1da177e4 LT |
101 | if (! data) |
102 | return -ENOMEM; | |
103 | ||
104 | err = -EFAULT; | |
105 | /* copy id */ | |
106 | if (copy_from_user(&data->id, &data32->id, sizeof(data->id))) | |
107 | goto error; | |
108 | /* we need to copy the item index. | |
109 | * hope this doesn't break anything.. | |
110 | */ | |
111 | if (get_user(data->value.enumerated.item, &data32->value.enumerated.item)) | |
112 | goto error; | |
64649400 GP |
113 | |
114 | snd_power_lock(ctl->card); | |
cbac4b0c | 115 | err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0); |
64649400 GP |
116 | if (err >= 0) |
117 | err = snd_ctl_elem_info(ctl, data); | |
118 | snd_power_unlock(ctl->card); | |
119 | ||
1da177e4 LT |
120 | if (err < 0) |
121 | goto error; | |
122 | /* restore info to 32bit */ | |
123 | err = -EFAULT; | |
124 | /* id, type, access, count */ | |
125 | if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) || | |
126 | copy_to_user(&data32->type, &data->type, 3 * sizeof(u32))) | |
127 | goto error; | |
128 | if (put_user(data->owner, &data32->owner)) | |
129 | goto error; | |
130 | switch (data->type) { | |
131 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: | |
132 | case SNDRV_CTL_ELEM_TYPE_INTEGER: | |
133 | if (put_user(data->value.integer.min, &data32->value.integer.min) || | |
134 | put_user(data->value.integer.max, &data32->value.integer.max) || | |
135 | put_user(data->value.integer.step, &data32->value.integer.step)) | |
136 | goto error; | |
137 | break; | |
138 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: | |
139 | if (copy_to_user(&data32->value.integer64, | |
140 | &data->value.integer64, | |
141 | sizeof(data->value.integer64))) | |
142 | goto error; | |
143 | break; | |
144 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: | |
145 | if (copy_to_user(&data32->value.enumerated, | |
146 | &data->value.enumerated, | |
147 | sizeof(data->value.enumerated))) | |
148 | goto error; | |
149 | break; | |
150 | default: | |
151 | break; | |
152 | } | |
153 | err = 0; | |
154 | error: | |
155 | kfree(data); | |
156 | return err; | |
157 | } | |
158 | ||
159 | /* read / write */ | |
82e9bae6 TI |
160 | struct snd_ctl_elem_value32 { |
161 | struct snd_ctl_elem_id id; | |
1da177e4 LT |
162 | unsigned int indirect; /* bit-field causes misalignment */ |
163 | union { | |
164 | s32 integer[128]; | |
165 | unsigned char data[512]; | |
166 | #ifndef CONFIG_X86_64 | |
167 | s64 integer64[64]; | |
168 | #endif | |
169 | } value; | |
170 | unsigned char reserved[128]; | |
171 | }; | |
172 | ||
6236d8bb TI |
173 | #ifdef CONFIG_X86_X32 |
174 | /* x32 has a different alignment for 64bit values from ia32 */ | |
175 | struct snd_ctl_elem_value_x32 { | |
176 | struct snd_ctl_elem_id id; | |
177 | unsigned int indirect; /* bit-field causes misalignment */ | |
178 | union { | |
179 | s32 integer[128]; | |
180 | unsigned char data[512]; | |
181 | s64 integer64[64]; | |
182 | } value; | |
183 | unsigned char reserved[128]; | |
184 | }; | |
185 | #endif /* CONFIG_X86_X32 */ | |
1da177e4 LT |
186 | |
187 | /* get the value type and count of the control */ | |
82e9bae6 TI |
188 | static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id, |
189 | int *countp) | |
1da177e4 | 190 | { |
82e9bae6 | 191 | struct snd_kcontrol *kctl; |
aa657ca9 | 192 | struct snd_ctl_elem_info *info; |
1da177e4 LT |
193 | int err; |
194 | ||
195 | down_read(&card->controls_rwsem); | |
196 | kctl = snd_ctl_find_id(card, id); | |
197 | if (! kctl) { | |
198 | up_read(&card->controls_rwsem); | |
6f021744 | 199 | return -ENOENT; |
1da177e4 | 200 | } |
aa657ca9 JK |
201 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
202 | if (info == NULL) { | |
203 | up_read(&card->controls_rwsem); | |
204 | return -ENOMEM; | |
205 | } | |
206 | info->id = *id; | |
207 | err = kctl->info(kctl, info); | |
1da177e4 LT |
208 | up_read(&card->controls_rwsem); |
209 | if (err >= 0) { | |
aa657ca9 JK |
210 | err = info->type; |
211 | *countp = info->count; | |
1da177e4 | 212 | } |
aa657ca9 | 213 | kfree(info); |
1da177e4 LT |
214 | return err; |
215 | } | |
216 | ||
217 | static int get_elem_size(int type, int count) | |
218 | { | |
219 | switch (type) { | |
220 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: | |
221 | return sizeof(s64) * count; | |
222 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: | |
223 | return sizeof(int) * count; | |
224 | case SNDRV_CTL_ELEM_TYPE_BYTES: | |
225 | return 512; | |
226 | case SNDRV_CTL_ELEM_TYPE_IEC958: | |
82e9bae6 | 227 | return sizeof(struct snd_aes_iec958); |
1da177e4 LT |
228 | default: |
229 | return -1; | |
230 | } | |
231 | } | |
232 | ||
82e9bae6 TI |
233 | static int copy_ctl_value_from_user(struct snd_card *card, |
234 | struct snd_ctl_elem_value *data, | |
6236d8bb TI |
235 | void __user *userdata, |
236 | void __user *valuep, | |
1da177e4 LT |
237 | int *typep, int *countp) |
238 | { | |
6236d8bb | 239 | struct snd_ctl_elem_value32 __user *data32 = userdata; |
5050b092 AM |
240 | int i, type, size; |
241 | int uninitialized_var(count); | |
1da177e4 LT |
242 | unsigned int indirect; |
243 | ||
244 | if (copy_from_user(&data->id, &data32->id, sizeof(data->id))) | |
245 | return -EFAULT; | |
246 | if (get_user(indirect, &data32->indirect)) | |
247 | return -EFAULT; | |
248 | if (indirect) | |
249 | return -EINVAL; | |
250 | type = get_ctl_type(card, &data->id, &count); | |
251 | if (type < 0) | |
252 | return type; | |
253 | ||
254 | if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN || | |
255 | type == SNDRV_CTL_ELEM_TYPE_INTEGER) { | |
256 | for (i = 0; i < count; i++) { | |
6236d8bb | 257 | s32 __user *intp = valuep; |
1da177e4 | 258 | int val; |
6236d8bb | 259 | if (get_user(val, &intp[i])) |
1da177e4 LT |
260 | return -EFAULT; |
261 | data->value.integer.value[i] = val; | |
262 | } | |
263 | } else { | |
264 | size = get_elem_size(type, count); | |
265 | if (size < 0) { | |
bb009457 | 266 | dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type); |
1da177e4 LT |
267 | return -EINVAL; |
268 | } | |
6236d8bb | 269 | if (copy_from_user(data->value.bytes.data, valuep, size)) |
1da177e4 LT |
270 | return -EFAULT; |
271 | } | |
272 | ||
273 | *typep = type; | |
274 | *countp = count; | |
275 | return 0; | |
276 | } | |
277 | ||
278 | /* restore the value to 32bit */ | |
6236d8bb TI |
279 | static int copy_ctl_value_to_user(void __user *userdata, |
280 | void __user *valuep, | |
82e9bae6 | 281 | struct snd_ctl_elem_value *data, |
1da177e4 LT |
282 | int type, int count) |
283 | { | |
284 | int i, size; | |
285 | ||
286 | if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN || | |
287 | type == SNDRV_CTL_ELEM_TYPE_INTEGER) { | |
288 | for (i = 0; i < count; i++) { | |
6236d8bb | 289 | s32 __user *intp = valuep; |
1da177e4 LT |
290 | int val; |
291 | val = data->value.integer.value[i]; | |
6236d8bb | 292 | if (put_user(val, &intp[i])) |
1da177e4 LT |
293 | return -EFAULT; |
294 | } | |
295 | } else { | |
296 | size = get_elem_size(type, count); | |
6236d8bb | 297 | if (copy_to_user(valuep, data->value.bytes.data, size)) |
1da177e4 LT |
298 | return -EFAULT; |
299 | } | |
300 | return 0; | |
301 | } | |
302 | ||
6236d8bb TI |
303 | static int ctl_elem_read_user(struct snd_card *card, |
304 | void __user *userdata, void __user *valuep) | |
1da177e4 | 305 | { |
82e9bae6 | 306 | struct snd_ctl_elem_value *data; |
1da177e4 LT |
307 | int err, type, count; |
308 | ||
ca2c0966 | 309 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1da177e4 LT |
310 | if (data == NULL) |
311 | return -ENOMEM; | |
312 | ||
6236d8bb TI |
313 | err = copy_ctl_value_from_user(card, data, userdata, valuep, |
314 | &type, &count); | |
315 | if (err < 0) | |
1da177e4 | 316 | goto error; |
64649400 GP |
317 | |
318 | snd_power_lock(card); | |
cbac4b0c | 319 | err = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
64649400 GP |
320 | if (err >= 0) |
321 | err = snd_ctl_elem_read(card, data); | |
322 | snd_power_unlock(card); | |
323 | if (err >= 0) | |
6236d8bb TI |
324 | err = copy_ctl_value_to_user(userdata, valuep, data, |
325 | type, count); | |
1da177e4 LT |
326 | error: |
327 | kfree(data); | |
328 | return err; | |
329 | } | |
330 | ||
6236d8bb TI |
331 | static int ctl_elem_write_user(struct snd_ctl_file *file, |
332 | void __user *userdata, void __user *valuep) | |
1da177e4 | 333 | { |
82e9bae6 | 334 | struct snd_ctl_elem_value *data; |
64649400 | 335 | struct snd_card *card = file->card; |
1da177e4 LT |
336 | int err, type, count; |
337 | ||
ca2c0966 | 338 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1da177e4 LT |
339 | if (data == NULL) |
340 | return -ENOMEM; | |
341 | ||
6236d8bb TI |
342 | err = copy_ctl_value_from_user(card, data, userdata, valuep, |
343 | &type, &count); | |
344 | if (err < 0) | |
1da177e4 | 345 | goto error; |
64649400 GP |
346 | |
347 | snd_power_lock(card); | |
cbac4b0c | 348 | err = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
64649400 GP |
349 | if (err >= 0) |
350 | err = snd_ctl_elem_write(card, file, data); | |
351 | snd_power_unlock(card); | |
352 | if (err >= 0) | |
6236d8bb TI |
353 | err = copy_ctl_value_to_user(userdata, valuep, data, |
354 | type, count); | |
1da177e4 LT |
355 | error: |
356 | kfree(data); | |
357 | return err; | |
358 | } | |
359 | ||
6236d8bb TI |
360 | static int snd_ctl_elem_read_user_compat(struct snd_card *card, |
361 | struct snd_ctl_elem_value32 __user *data32) | |
362 | { | |
363 | return ctl_elem_read_user(card, data32, &data32->value); | |
364 | } | |
365 | ||
366 | static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file, | |
367 | struct snd_ctl_elem_value32 __user *data32) | |
368 | { | |
369 | return ctl_elem_write_user(file, data32, &data32->value); | |
370 | } | |
371 | ||
372 | #ifdef CONFIG_X86_X32 | |
373 | static int snd_ctl_elem_read_user_x32(struct snd_card *card, | |
374 | struct snd_ctl_elem_value_x32 __user *data32) | |
375 | { | |
376 | return ctl_elem_read_user(card, data32, &data32->value); | |
377 | } | |
378 | ||
379 | static int snd_ctl_elem_write_user_x32(struct snd_ctl_file *file, | |
380 | struct snd_ctl_elem_value_x32 __user *data32) | |
381 | { | |
382 | return ctl_elem_write_user(file, data32, &data32->value); | |
383 | } | |
384 | #endif /* CONFIG_X86_X32 */ | |
385 | ||
1da177e4 | 386 | /* add or replace a user control */ |
82e9bae6 TI |
387 | static int snd_ctl_elem_add_compat(struct snd_ctl_file *file, |
388 | struct snd_ctl_elem_info32 __user *data32, | |
1da177e4 LT |
389 | int replace) |
390 | { | |
82e9bae6 | 391 | struct snd_ctl_elem_info *data; |
1da177e4 LT |
392 | int err; |
393 | ||
ca2c0966 | 394 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1da177e4 LT |
395 | if (! data) |
396 | return -ENOMEM; | |
397 | ||
398 | err = -EFAULT; | |
399 | /* id, type, access, count */ \ | |
400 | if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) || | |
401 | copy_from_user(&data->type, &data32->type, 3 * sizeof(u32))) | |
402 | goto error; | |
403 | if (get_user(data->owner, &data32->owner) || | |
404 | get_user(data->type, &data32->type)) | |
405 | goto error; | |
406 | switch (data->type) { | |
407 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: | |
408 | case SNDRV_CTL_ELEM_TYPE_INTEGER: | |
409 | if (get_user(data->value.integer.min, &data32->value.integer.min) || | |
410 | get_user(data->value.integer.max, &data32->value.integer.max) || | |
411 | get_user(data->value.integer.step, &data32->value.integer.step)) | |
412 | goto error; | |
413 | break; | |
414 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: | |
415 | if (copy_from_user(&data->value.integer64, | |
416 | &data32->value.integer64, | |
417 | sizeof(data->value.integer64))) | |
418 | goto error; | |
419 | break; | |
420 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: | |
421 | if (copy_from_user(&data->value.enumerated, | |
422 | &data32->value.enumerated, | |
423 | sizeof(data->value.enumerated))) | |
424 | goto error; | |
8d448162 CL |
425 | data->value.enumerated.names_ptr = |
426 | (uintptr_t)compat_ptr(data->value.enumerated.names_ptr); | |
1da177e4 LT |
427 | break; |
428 | default: | |
429 | break; | |
430 | } | |
431 | err = snd_ctl_elem_add(file, data, replace); | |
432 | error: | |
433 | kfree(data); | |
434 | return err; | |
435 | } | |
436 | ||
437 | enum { | |
82e9bae6 TI |
438 | SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32), |
439 | SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32), | |
440 | SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32), | |
441 | SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32), | |
442 | SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32), | |
443 | SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32), | |
6236d8bb TI |
444 | #ifdef CONFIG_X86_X32 |
445 | SNDRV_CTL_IOCTL_ELEM_READ_X32 = _IOWR('U', 0x12, struct snd_ctl_elem_value_x32), | |
446 | SNDRV_CTL_IOCTL_ELEM_WRITE_X32 = _IOWR('U', 0x13, struct snd_ctl_elem_value_x32), | |
447 | #endif /* CONFIG_X86_X32 */ | |
1da177e4 LT |
448 | }; |
449 | ||
450 | static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) | |
451 | { | |
82e9bae6 | 452 | struct snd_ctl_file *ctl; |
9244b2c3 | 453 | struct snd_kctl_ioctl *p; |
1da177e4 LT |
454 | void __user *argp = compat_ptr(arg); |
455 | int err; | |
456 | ||
457 | ctl = file->private_data; | |
7eaa943c TI |
458 | if (snd_BUG_ON(!ctl || !ctl->card)) |
459 | return -ENXIO; | |
1da177e4 LT |
460 | |
461 | switch (cmd) { | |
462 | case SNDRV_CTL_IOCTL_PVERSION: | |
463 | case SNDRV_CTL_IOCTL_CARD_INFO: | |
464 | case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS: | |
465 | case SNDRV_CTL_IOCTL_POWER: | |
466 | case SNDRV_CTL_IOCTL_POWER_STATE: | |
467 | case SNDRV_CTL_IOCTL_ELEM_LOCK: | |
468 | case SNDRV_CTL_IOCTL_ELEM_UNLOCK: | |
2b1181ed TI |
469 | case SNDRV_CTL_IOCTL_ELEM_REMOVE: |
470 | case SNDRV_CTL_IOCTL_TLV_READ: | |
471 | case SNDRV_CTL_IOCTL_TLV_WRITE: | |
472 | case SNDRV_CTL_IOCTL_TLV_COMMAND: | |
1da177e4 LT |
473 | return snd_ctl_ioctl(file, cmd, (unsigned long)argp); |
474 | case SNDRV_CTL_IOCTL_ELEM_LIST32: | |
475 | return snd_ctl_elem_list_compat(ctl->card, argp); | |
476 | case SNDRV_CTL_IOCTL_ELEM_INFO32: | |
477 | return snd_ctl_elem_info_compat(ctl, argp); | |
478 | case SNDRV_CTL_IOCTL_ELEM_READ32: | |
479 | return snd_ctl_elem_read_user_compat(ctl->card, argp); | |
480 | case SNDRV_CTL_IOCTL_ELEM_WRITE32: | |
481 | return snd_ctl_elem_write_user_compat(ctl, argp); | |
482 | case SNDRV_CTL_IOCTL_ELEM_ADD32: | |
483 | return snd_ctl_elem_add_compat(ctl, argp, 0); | |
484 | case SNDRV_CTL_IOCTL_ELEM_REPLACE32: | |
485 | return snd_ctl_elem_add_compat(ctl, argp, 1); | |
6236d8bb TI |
486 | #ifdef CONFIG_X86_X32 |
487 | case SNDRV_CTL_IOCTL_ELEM_READ_X32: | |
488 | return snd_ctl_elem_read_user_x32(ctl->card, argp); | |
489 | case SNDRV_CTL_IOCTL_ELEM_WRITE_X32: | |
490 | return snd_ctl_elem_write_user_x32(ctl, argp); | |
491 | #endif /* CONFIG_X86_X32 */ | |
1da177e4 LT |
492 | } |
493 | ||
494 | down_read(&snd_ioctl_rwsem); | |
9244b2c3 | 495 | list_for_each_entry(p, &snd_control_compat_ioctls, list) { |
1da177e4 LT |
496 | if (p->fioctl) { |
497 | err = p->fioctl(ctl->card, ctl, cmd, arg); | |
498 | if (err != -ENOIOCTLCMD) { | |
499 | up_read(&snd_ioctl_rwsem); | |
500 | return err; | |
501 | } | |
502 | } | |
503 | } | |
504 | up_read(&snd_ioctl_rwsem); | |
505 | return -ENOIOCTLCMD; | |
506 | } |