1 /***********************************************************************
2 *
3 * Copyright(c) 2013 Mauro Carvalho Chehab <mchehab@redhat.com>
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
9
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 ***********************************************************************/
19
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/init.h>
25 #include <linux/debugfs.h>
26 #include <linux/spinlock.h>
27 #include <linux/usb.h>
28
29 #include "dmxdev.h"
30 #include "dvbdev.h"
31 #include "dvb_demux.h"
32 #include "dvb_frontend.h"
33
34 #include "smscoreapi.h"
35
36 #include "smsdvb.h"
37
38 static struct dentry *smsdvb_debugfs_usb_root;
39
40 struct smsdvb_debugfs {
41 struct kref refcount;
42 spinlock_t lock;
43
44 char stats_data[PAGE_SIZE];
45 unsigned stats_count;
46 bool stats_was_read;
47
48 wait_queue_head_t stats_queue;
49 };
50
smsdvb_print_dvb_stats(struct smsdvb_debugfs * debug_data,struct sms_stats * p)51 static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
52 struct sms_stats *p)
53 {
54 int n = 0;
55 char *buf;
56
57 spin_lock(&debug_data->lock);
58 if (debug_data->stats_count) {
59 spin_unlock(&debug_data->lock);
60 return;
61 }
62
63 buf = debug_data->stats_data;
64
65 n += snprintf(&buf[n], PAGE_SIZE - n,
66 "is_rf_locked = %d\n", p->is_rf_locked);
67 n += snprintf(&buf[n], PAGE_SIZE - n,
68 "is_demod_locked = %d\n", p->is_demod_locked);
69 n += snprintf(&buf[n], PAGE_SIZE - n,
70 "is_external_lna_on = %d\n", p->is_external_lna_on);
71 n += snprintf(&buf[n], PAGE_SIZE - n,
72 "SNR = %d\n", p->SNR);
73 n += snprintf(&buf[n], PAGE_SIZE - n,
74 "ber = %d\n", p->ber);
75 n += snprintf(&buf[n], PAGE_SIZE - n,
76 "FIB_CRC = %d\n", p->FIB_CRC);
77 n += snprintf(&buf[n], PAGE_SIZE - n,
78 "ts_per = %d\n", p->ts_per);
79 n += snprintf(&buf[n], PAGE_SIZE - n,
80 "MFER = %d\n", p->MFER);
81 n += snprintf(&buf[n], PAGE_SIZE - n,
82 "RSSI = %d\n", p->RSSI);
83 n += snprintf(&buf[n], PAGE_SIZE - n,
84 "in_band_pwr = %d\n", p->in_band_pwr);
85 n += snprintf(&buf[n], PAGE_SIZE - n,
86 "carrier_offset = %d\n", p->carrier_offset);
87 n += snprintf(&buf[n], PAGE_SIZE - n,
88 "modem_state = %d\n", p->modem_state);
89 n += snprintf(&buf[n], PAGE_SIZE - n,
90 "frequency = %d\n", p->frequency);
91 n += snprintf(&buf[n], PAGE_SIZE - n,
92 "bandwidth = %d\n", p->bandwidth);
93 n += snprintf(&buf[n], PAGE_SIZE - n,
94 "transmission_mode = %d\n", p->transmission_mode);
95 n += snprintf(&buf[n], PAGE_SIZE - n,
96 "modem_state = %d\n", p->modem_state);
97 n += snprintf(&buf[n], PAGE_SIZE - n,
98 "guard_interval = %d\n", p->guard_interval);
99 n += snprintf(&buf[n], PAGE_SIZE - n,
100 "code_rate = %d\n", p->code_rate);
101 n += snprintf(&buf[n], PAGE_SIZE - n,
102 "lp_code_rate = %d\n", p->lp_code_rate);
103 n += snprintf(&buf[n], PAGE_SIZE - n,
104 "hierarchy = %d\n", p->hierarchy);
105 n += snprintf(&buf[n], PAGE_SIZE - n,
106 "constellation = %d\n", p->constellation);
107 n += snprintf(&buf[n], PAGE_SIZE - n,
108 "burst_size = %d\n", p->burst_size);
109 n += snprintf(&buf[n], PAGE_SIZE - n,
110 "burst_duration = %d\n", p->burst_duration);
111 n += snprintf(&buf[n], PAGE_SIZE - n,
112 "burst_cycle_time = %d\n", p->burst_cycle_time);
113 n += snprintf(&buf[n], PAGE_SIZE - n,
114 "calc_burst_cycle_time = %d\n",
115 p->calc_burst_cycle_time);
116 n += snprintf(&buf[n], PAGE_SIZE - n,
117 "num_of_rows = %d\n", p->num_of_rows);
118 n += snprintf(&buf[n], PAGE_SIZE - n,
119 "num_of_padd_cols = %d\n", p->num_of_padd_cols);
120 n += snprintf(&buf[n], PAGE_SIZE - n,
121 "num_of_punct_cols = %d\n", p->num_of_punct_cols);
122 n += snprintf(&buf[n], PAGE_SIZE - n,
123 "error_ts_packets = %d\n", p->error_ts_packets);
124 n += snprintf(&buf[n], PAGE_SIZE - n,
125 "total_ts_packets = %d\n", p->total_ts_packets);
126 n += snprintf(&buf[n], PAGE_SIZE - n,
127 "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
128 n += snprintf(&buf[n], PAGE_SIZE - n,
129 "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
130 n += snprintf(&buf[n], PAGE_SIZE - n,
131 "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
132 n += snprintf(&buf[n], PAGE_SIZE - n,
133 "ber_error_count = %d\n", p->ber_error_count);
134 n += snprintf(&buf[n], PAGE_SIZE - n,
135 "ber_bit_count = %d\n", p->ber_bit_count);
136 n += snprintf(&buf[n], PAGE_SIZE - n,
137 "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
138 n += snprintf(&buf[n], PAGE_SIZE - n,
139 "pre_ber = %d\n", p->pre_ber);
140 n += snprintf(&buf[n], PAGE_SIZE - n,
141 "cell_id = %d\n", p->cell_id);
142 n += snprintf(&buf[n], PAGE_SIZE - n,
143 "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
144 n += snprintf(&buf[n], PAGE_SIZE - n,
145 "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
146 n += snprintf(&buf[n], PAGE_SIZE - n,
147 "num_mpe_received = %d\n", p->num_mpe_received);
148
149 debug_data->stats_count = n;
150 spin_unlock(&debug_data->lock);
151 wake_up(&debug_data->stats_queue);
152 }
153
smsdvb_print_isdb_stats(struct smsdvb_debugfs * debug_data,struct sms_isdbt_stats * p)154 static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
155 struct sms_isdbt_stats *p)
156 {
157 int i, n = 0;
158 char *buf;
159
160 spin_lock(&debug_data->lock);
161 if (debug_data->stats_count) {
162 spin_unlock(&debug_data->lock);
163 return;
164 }
165
166 buf = debug_data->stats_data;
167
168 n += snprintf(&buf[n], PAGE_SIZE - n,
169 "statistics_type = %d\t", p->statistics_type);
170 n += snprintf(&buf[n], PAGE_SIZE - n,
171 "full_size = %d\n", p->full_size);
172
173 n += snprintf(&buf[n], PAGE_SIZE - n,
174 "is_rf_locked = %d\t\t", p->is_rf_locked);
175 n += snprintf(&buf[n], PAGE_SIZE - n,
176 "is_demod_locked = %d\t", p->is_demod_locked);
177 n += snprintf(&buf[n], PAGE_SIZE - n,
178 "is_external_lna_on = %d\n", p->is_external_lna_on);
179 n += snprintf(&buf[n], PAGE_SIZE - n,
180 "SNR = %d dB\t\t", p->SNR);
181 n += snprintf(&buf[n], PAGE_SIZE - n,
182 "RSSI = %d dBm\t\t", p->RSSI);
183 n += snprintf(&buf[n], PAGE_SIZE - n,
184 "in_band_pwr = %d dBm\n", p->in_band_pwr);
185 n += snprintf(&buf[n], PAGE_SIZE - n,
186 "carrier_offset = %d\t", p->carrier_offset);
187 n += snprintf(&buf[n], PAGE_SIZE - n,
188 "bandwidth = %d\t\t", p->bandwidth);
189 n += snprintf(&buf[n], PAGE_SIZE - n,
190 "frequency = %d Hz\n", p->frequency);
191 n += snprintf(&buf[n], PAGE_SIZE - n,
192 "transmission_mode = %d\t", p->transmission_mode);
193 n += snprintf(&buf[n], PAGE_SIZE - n,
194 "modem_state = %d\t\t", p->modem_state);
195 n += snprintf(&buf[n], PAGE_SIZE - n,
196 "guard_interval = %d\n", p->guard_interval);
197 n += snprintf(&buf[n], PAGE_SIZE - n,
198 "system_type = %d\t\t", p->system_type);
199 n += snprintf(&buf[n], PAGE_SIZE - n,
200 "partial_reception = %d\t", p->partial_reception);
201 n += snprintf(&buf[n], PAGE_SIZE - n,
202 "num_of_layers = %d\n", p->num_of_layers);
203 n += snprintf(&buf[n], PAGE_SIZE - n,
204 "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
205
206 for (i = 0; i < 3; i++) {
207 if (p->layer_info[i].number_of_segments < 1 ||
208 p->layer_info[i].number_of_segments > 13)
209 continue;
210
211 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
212 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
213 p->layer_info[i].code_rate);
214 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
215 p->layer_info[i].constellation);
216 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
217 p->layer_info[i].ber);
218 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
219 p->layer_info[i].ber_error_count);
220 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
221 p->layer_info[i].ber_bit_count);
222 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
223 p->layer_info[i].pre_ber);
224 n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
225 p->layer_info[i].ts_per);
226 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
227 p->layer_info[i].error_ts_packets);
228 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
229 p->layer_info[i].total_ts_packets);
230 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
231 p->layer_info[i].ti_ldepth_i);
232 n += snprintf(&buf[n], PAGE_SIZE - n,
233 "\tnumber_of_segments = %d\t",
234 p->layer_info[i].number_of_segments);
235 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
236 p->layer_info[i].tmcc_errors);
237 }
238
239 debug_data->stats_count = n;
240 spin_unlock(&debug_data->lock);
241 wake_up(&debug_data->stats_queue);
242 }
243
smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs * debug_data,struct sms_isdbt_stats_ex * p)244 static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
245 struct sms_isdbt_stats_ex *p)
246 {
247 int i, n = 0;
248 char *buf;
249
250 spin_lock(&debug_data->lock);
251 if (debug_data->stats_count) {
252 spin_unlock(&debug_data->lock);
253 return;
254 }
255
256 buf = debug_data->stats_data;
257
258 n += snprintf(&buf[n], PAGE_SIZE - n,
259 "statistics_type = %d\t", p->statistics_type);
260 n += snprintf(&buf[n], PAGE_SIZE - n,
261 "full_size = %d\n", p->full_size);
262
263 n += snprintf(&buf[n], PAGE_SIZE - n,
264 "is_rf_locked = %d\t\t", p->is_rf_locked);
265 n += snprintf(&buf[n], PAGE_SIZE - n,
266 "is_demod_locked = %d\t", p->is_demod_locked);
267 n += snprintf(&buf[n], PAGE_SIZE - n,
268 "is_external_lna_on = %d\n", p->is_external_lna_on);
269 n += snprintf(&buf[n], PAGE_SIZE - n,
270 "SNR = %d dB\t\t", p->SNR);
271 n += snprintf(&buf[n], PAGE_SIZE - n,
272 "RSSI = %d dBm\t\t", p->RSSI);
273 n += snprintf(&buf[n], PAGE_SIZE - n,
274 "in_band_pwr = %d dBm\n", p->in_band_pwr);
275 n += snprintf(&buf[n], PAGE_SIZE - n,
276 "carrier_offset = %d\t", p->carrier_offset);
277 n += snprintf(&buf[n], PAGE_SIZE - n,
278 "bandwidth = %d\t\t", p->bandwidth);
279 n += snprintf(&buf[n], PAGE_SIZE - n,
280 "frequency = %d Hz\n", p->frequency);
281 n += snprintf(&buf[n], PAGE_SIZE - n,
282 "transmission_mode = %d\t", p->transmission_mode);
283 n += snprintf(&buf[n], PAGE_SIZE - n,
284 "modem_state = %d\t\t", p->modem_state);
285 n += snprintf(&buf[n], PAGE_SIZE - n,
286 "guard_interval = %d\n", p->guard_interval);
287 n += snprintf(&buf[n], PAGE_SIZE - n,
288 "system_type = %d\t\t", p->system_type);
289 n += snprintf(&buf[n], PAGE_SIZE - n,
290 "partial_reception = %d\t", p->partial_reception);
291 n += snprintf(&buf[n], PAGE_SIZE - n,
292 "num_of_layers = %d\n", p->num_of_layers);
293 n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
294 p->segment_number);
295 n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
296 p->tune_bw);
297
298 for (i = 0; i < 3; i++) {
299 if (p->layer_info[i].number_of_segments < 1 ||
300 p->layer_info[i].number_of_segments > 13)
301 continue;
302
303 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
304 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
305 p->layer_info[i].code_rate);
306 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
307 p->layer_info[i].constellation);
308 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
309 p->layer_info[i].ber);
310 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
311 p->layer_info[i].ber_error_count);
312 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
313 p->layer_info[i].ber_bit_count);
314 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
315 p->layer_info[i].pre_ber);
316 n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
317 p->layer_info[i].ts_per);
318 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
319 p->layer_info[i].error_ts_packets);
320 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
321 p->layer_info[i].total_ts_packets);
322 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
323 p->layer_info[i].ti_ldepth_i);
324 n += snprintf(&buf[n], PAGE_SIZE - n,
325 "\tnumber_of_segments = %d\t",
326 p->layer_info[i].number_of_segments);
327 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
328 p->layer_info[i].tmcc_errors);
329 }
330
331
332 debug_data->stats_count = n;
333 spin_unlock(&debug_data->lock);
334
335 wake_up(&debug_data->stats_queue);
336 }
337
smsdvb_stats_open(struct inode * inode,struct file * file)338 static int smsdvb_stats_open(struct inode *inode, struct file *file)
339 {
340 struct smsdvb_client_t *client = inode->i_private;
341 struct smsdvb_debugfs *debug_data = client->debug_data;
342
343 kref_get(&debug_data->refcount);
344
345 spin_lock(&debug_data->lock);
346 debug_data->stats_count = 0;
347 debug_data->stats_was_read = false;
348 spin_unlock(&debug_data->lock);
349
350 file->private_data = debug_data;
351
352 return 0;
353 }
354
smsdvb_debugfs_data_release(struct kref * ref)355 static void smsdvb_debugfs_data_release(struct kref *ref)
356 {
357 struct smsdvb_debugfs *debug_data;
358
359 debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
360 kfree(debug_data);
361 }
362
smsdvb_stats_wait_read(struct smsdvb_debugfs * debug_data)363 static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
364 {
365 int rc = 1;
366
367 spin_lock(&debug_data->lock);
368
369 if (debug_data->stats_was_read)
370 goto exit;
371
372 rc = debug_data->stats_count;
373
374 exit:
375 spin_unlock(&debug_data->lock);
376 return rc;
377 }
378
smsdvb_stats_poll(struct file * file,poll_table * wait)379 static unsigned int smsdvb_stats_poll(struct file *file, poll_table *wait)
380 {
381 struct smsdvb_debugfs *debug_data = file->private_data;
382 int rc;
383
384 kref_get(&debug_data->refcount);
385
386 poll_wait(file, &debug_data->stats_queue, wait);
387
388 rc = smsdvb_stats_wait_read(debug_data);
389 if (rc > 0)
390 rc = POLLIN | POLLRDNORM;
391
392 kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
393
394 return rc;
395 }
396
smsdvb_stats_read(struct file * file,char __user * user_buf,size_t nbytes,loff_t * ppos)397 static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
398 size_t nbytes, loff_t *ppos)
399 {
400 int rc = 0, len;
401 struct smsdvb_debugfs *debug_data = file->private_data;
402
403 kref_get(&debug_data->refcount);
404
405 if (file->f_flags & O_NONBLOCK) {
406 rc = smsdvb_stats_wait_read(debug_data);
407 if (!rc) {
408 rc = -EWOULDBLOCK;
409 goto ret;
410 }
411 } else {
412 rc = wait_event_interruptible(debug_data->stats_queue,
413 smsdvb_stats_wait_read(debug_data));
414 if (rc < 0)
415 goto ret;
416 }
417
418 if (debug_data->stats_was_read) {
419 rc = 0; /* EOF */
420 goto ret;
421 }
422
423 len = debug_data->stats_count - *ppos;
424 if (len >= 0)
425 rc = simple_read_from_buffer(user_buf, nbytes, ppos,
426 debug_data->stats_data, len);
427 else
428 rc = 0;
429
430 if (*ppos >= debug_data->stats_count) {
431 spin_lock(&debug_data->lock);
432 debug_data->stats_was_read = true;
433 spin_unlock(&debug_data->lock);
434 }
435 ret:
436 kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
437 return rc;
438 }
439
smsdvb_stats_release(struct inode * inode,struct file * file)440 static int smsdvb_stats_release(struct inode *inode, struct file *file)
441 {
442 struct smsdvb_debugfs *debug_data = file->private_data;
443
444 spin_lock(&debug_data->lock);
445 debug_data->stats_was_read = true; /* return EOF to read() */
446 spin_unlock(&debug_data->lock);
447 wake_up_interruptible_sync(&debug_data->stats_queue);
448
449 kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
450 file->private_data = NULL;
451
452 return 0;
453 }
454
455 static const struct file_operations debugfs_stats_ops = {
456 .open = smsdvb_stats_open,
457 .poll = smsdvb_stats_poll,
458 .read = smsdvb_stats_read,
459 .release = smsdvb_stats_release,
460 .llseek = generic_file_llseek,
461 };
462
463 /*
464 * Functions used by smsdvb, in order to create the interfaces
465 */
466
smsdvb_debugfs_create(struct smsdvb_client_t * client)467 int smsdvb_debugfs_create(struct smsdvb_client_t *client)
468 {
469 struct smscore_device_t *coredev = client->coredev;
470 struct dentry *d;
471 struct smsdvb_debugfs *debug_data;
472
473 if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
474 return -ENODEV;
475
476 client->debugfs = debugfs_create_dir(coredev->devpath,
477 smsdvb_debugfs_usb_root);
478 if (IS_ERR_OR_NULL(client->debugfs)) {
479 pr_info("Unable to create debugfs %s directory.\n",
480 coredev->devpath);
481 return -ENODEV;
482 }
483
484 d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
485 client, &debugfs_stats_ops);
486 if (!d) {
487 debugfs_remove(client->debugfs);
488 return -ENOMEM;
489 }
490
491 debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
492 if (!debug_data)
493 return -ENOMEM;
494
495 client->debug_data = debug_data;
496 client->prt_dvb_stats = smsdvb_print_dvb_stats;
497 client->prt_isdb_stats = smsdvb_print_isdb_stats;
498 client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
499
500 init_waitqueue_head(&debug_data->stats_queue);
501 spin_lock_init(&debug_data->lock);
502 kref_init(&debug_data->refcount);
503
504 return 0;
505 }
506
smsdvb_debugfs_release(struct smsdvb_client_t * client)507 void smsdvb_debugfs_release(struct smsdvb_client_t *client)
508 {
509 if (!client->debugfs)
510 return;
511
512 client->prt_dvb_stats = NULL;
513 client->prt_isdb_stats = NULL;
514 client->prt_isdb_stats_ex = NULL;
515
516 debugfs_remove_recursive(client->debugfs);
517 kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
518
519 client->debug_data = NULL;
520 client->debugfs = NULL;
521 }
522
smsdvb_debugfs_register(void)523 int smsdvb_debugfs_register(void)
524 {
525 struct dentry *d;
526
527 /*
528 * FIXME: This was written to debug Siano USB devices. So, it creates
529 * the debugfs node under <debugfs>/usb.
530 * A similar logic would be needed for Siano sdio devices, but, in that
531 * case, usb_debug_root is not a good choice.
532 *
533 * Perhaps the right fix here would be to create another sysfs root
534 * node for sdio-based boards, but this may need some logic at sdio
535 * subsystem.
536 */
537 d = debugfs_create_dir("smsdvb", usb_debug_root);
538 if (IS_ERR_OR_NULL(d)) {
539 sms_err("Couldn't create sysfs node for smsdvb");
540 return PTR_ERR(d);
541 } else {
542 smsdvb_debugfs_usb_root = d;
543 }
544 return 0;
545 }
546
smsdvb_debugfs_unregister(void)547 void smsdvb_debugfs_unregister(void)
548 {
549 debugfs_remove_recursive(smsdvb_debugfs_usb_root);
550 smsdvb_debugfs_usb_root = NULL;
551 }
552