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ALSA: asihpi - Unsafe memory management when allocating control cache
[net-next-2.6.git] / sound / pci / asihpi / hpicmn.c
CommitLineData
719f82d3
EB		 1/******************************************************************************
2
3 AudioScience HPI driver
4 Copyright (C) 1997-2010 AudioScience Inc. <support@audioscience.com>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of version 2 of the GNU General Public License as
8 published by the Free Software Foundation;
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, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19\file hpicmn.c
20
21 Common functions used by hpixxxx.c modules
22
23(C) Copyright AudioScience Inc. 1998-2003
24*******************************************************************************/
25#define SOURCEFILE_NAME "hpicmn.c"
26
27#include "hpi_internal.h"
28#include "hpidebug.h"
29#include "hpicmn.h"
30
31struct hpi_adapters_list {
32 struct hpios_spinlock list_lock;
33 struct hpi_adapter_obj adapter[HPI_MAX_ADAPTERS];
34 u16 gw_num_adapters;
35};
36
37static struct hpi_adapters_list adapters;
38
39/**
40* Given an HPI Message that was sent out and a response that was received,
41* validate that the response has the correct fields filled in,
42* i.e ObjectType, Function etc
43**/
44u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr)
45{
46 u16 error = 0;
47
48 if ((phr->type != HPI_TYPE_RESPONSE)
49 || (phr->object != phm->object)
50 || (phr->function != phm->function))
51 error = HPI_ERROR_INVALID_RESPONSE;
52
53 return error;
54}
55
56u16 hpi_add_adapter(struct hpi_adapter_obj *pao)
57{
58 u16 retval = 0;
59 /*HPI_ASSERT(pao->wAdapterType); */
60
61 hpios_alistlock_lock(&adapters);
62
63 if (pao->index >= HPI_MAX_ADAPTERS) {
64 retval = HPI_ERROR_BAD_ADAPTER_NUMBER;
65 goto unlock;
66 }
67
68 if (adapters.adapter[pao->index].adapter_type) {
69 {
70 retval = HPI_DUPLICATE_ADAPTER_NUMBER;
71 goto unlock;
72 }
73 }
74 adapters.adapter[pao->index] = *pao;
75 hpios_dsplock_init(&adapters.adapter[pao->index]);
76 adapters.gw_num_adapters++;
77
78unlock:
79 hpios_alistlock_un_lock(&adapters);
80 return retval;
81}
82
83void hpi_delete_adapter(struct hpi_adapter_obj *pao)
84{
85 memset(pao, 0, sizeof(struct hpi_adapter_obj));
86
87 hpios_alistlock_lock(&adapters);
88 adapters.gw_num_adapters--; /* dec the number of adapters */
89 hpios_alistlock_un_lock(&adapters);
90}
91
92/**
93* FindAdapter returns a pointer to the struct hpi_adapter_obj with
94* index wAdapterIndex in an HPI_ADAPTERS_LIST structure.
95*
96*/
97struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index)
98{
99 struct hpi_adapter_obj *pao = NULL;
100
101 if (adapter_index >= HPI_MAX_ADAPTERS) {
102 HPI_DEBUG_LOG(VERBOSE, "find_adapter invalid index %d ",
103 adapter_index);
104 return NULL;
105 }
106
107 pao = &adapters.adapter[adapter_index];
108 if (pao->adapter_type != 0) {
109 /*
110 HPI_DEBUG_LOG(VERBOSE, "Found adapter index %d\n",
111 wAdapterIndex);
112 */
113 return pao;
114 } else {
115 /*
116 HPI_DEBUG_LOG(VERBOSE, "No adapter index %d\n",
117 wAdapterIndex);
118 */
119 return NULL;
120 }
121}
122
123/**
124*
125* wipe an HPI_ADAPTERS_LIST structure.
126*
127**/
128static void wipe_adapter_list(void
129 )
130{
131 memset(&adapters, 0, sizeof(adapters));
132}
133
134/**
135* SubSysGetAdapters fills awAdapterList in an struct hpi_response structure
136* with all adapters in the given HPI_ADAPTERS_LIST.
137*
138*/
139static void subsys_get_adapters(struct hpi_response *phr)
140{
141 /* fill in the response adapter array with the position */
142 /* identified by the adapter number/index of the adapters in */
143 /* this HPI */
144 /* i.e. if we have an A120 with it's jumper set to */
145 /* Adapter Number 2 then put an Adapter type A120 in the */
146 /* array in position 1 */
147 /* NOTE: AdapterNumber is 1..N, Index is 0..N-1 */
148
149 /* input: NONE */
150 /* output: wNumAdapters */
151 /* awAdapter[] */
152 /* */
153
154 short i;
155 struct hpi_adapter_obj *pao = NULL;
156
157 HPI_DEBUG_LOG(VERBOSE, "subsys_get_adapters\n");
158
159 /* for each adapter, place it's type in the position of the array */
160 /* corresponding to it's adapter number */
161 for (i = 0; i < adapters.gw_num_adapters; i++) {
162 pao = &adapters.adapter[i];
163 if (phr->u.s.aw_adapter_list[pao->index] != 0) {
164 phr->error = HPI_DUPLICATE_ADAPTER_NUMBER;
165 phr->specific_error = pao->index;
166 return;
167 }
168 phr->u.s.aw_adapter_list[pao->index] = pao->adapter_type;
169 }
170
171 phr->u.s.num_adapters = adapters.gw_num_adapters;
172 phr->error = 0; /* the function completed OK; */
173}
174
175static unsigned int control_cache_alloc_check(struct hpi_control_cache *pC)
176{
177 unsigned int i;
178 int cached = 0;
179 if (!pC)
180 return 0;
181 if ((!pC->init) && (pC->p_cache != NULL) && (pC->control_count)
182 && (pC->cache_size_in_bytes)
183 ) {
184 u32 *p_master_cache;
185 pC->init = 1;
186
187 p_master_cache = (u32 *)pC->p_cache;
188 HPI_DEBUG_LOG(VERBOSE, "check %d controls\n",
189 pC->control_count);
190 for (i = 0; i < pC->control_count; i++) {
191 struct hpi_control_cache_info *info =
192 (struct hpi_control_cache_info *)
193 p_master_cache;
194
195 if (info->control_type) {
196 pC->p_info[i] = info;
197 cached++;
198 } else
199 pC->p_info[i] = NULL;
200
201 if (info->size_in32bit_words)
202 p_master_cache += info->size_in32bit_words;
203 else
204 p_master_cache +=
205 sizeof(struct
206 hpi_control_cache_single) /
207 sizeof(u32);
208
209 HPI_DEBUG_LOG(VERBOSE,
210 "cached %d, pinfo %p index %d type %d\n",
211 cached, pC->p_info[i], info->control_index,
212 info->control_type);
213 }
214 /*
215 We didn't find anything to cache, so try again later !
216 */
217 if (!cached)
218 pC->init = 0;
219 }
220 return pC->init;
221}
222
223/** Find a control.
224*/
225static short find_control(struct hpi_message *phm,
226 struct hpi_control_cache *p_cache, struct hpi_control_cache_info **pI,
227 u16 *pw_control_index)
228{
229 *pw_control_index = phm->obj_index;
230
231 if (!control_cache_alloc_check(p_cache)) {
232 HPI_DEBUG_LOG(VERBOSE,
233 "control_cache_alloc_check() failed. adap%d ci%d\n",
234 phm->adapter_index, *pw_control_index);
235 return 0;
236 }
237
238 *pI = p_cache->p_info[*pw_control_index];
239 if (!*pI) {
240 HPI_DEBUG_LOG(VERBOSE, "uncached adap %d, control %d\n",
241 phm->adapter_index, *pw_control_index);
242 return 0;
243 } else {
244 HPI_DEBUG_LOG(VERBOSE, "find_control() type %d\n",
245 (*pI)->control_type);
246 }
247 return 1;
248}
249
250/** Used by the kernel driver to figure out if a buffer needs mapping.
251 */
252short hpi_check_buffer_mapping(struct hpi_control_cache *p_cache,
253 struct hpi_message *phm, void **p, unsigned int *pN)
254{
255 *pN = 0;
256 *p = NULL;
257 if ((phm->function == HPI_CONTROL_GET_STATE)
258 && (phm->object == HPI_OBJ_CONTROLEX)
259 ) {
260 u16 control_index;
261 struct hpi_control_cache_info *pI;
262
263 if (!find_control(phm, p_cache, &pI, &control_index))
264 return 0;
265 }
266 return 0;
267}
268
269/* allow unified treatment of several string fields within struct */
270#define HPICMN_PAD_OFS_AND_SIZE(m) {\
271 offsetof(struct hpi_control_cache_pad, m), \
272 sizeof(((struct hpi_control_cache_pad *)(NULL))->m) }
273
274struct pad_ofs_size {
275 unsigned int offset;
276 unsigned int field_size;
277};
278
279static struct pad_ofs_size pad_desc[] = {
280 HPICMN_PAD_OFS_AND_SIZE(c_channel), /* HPI_PAD_CHANNEL_NAME */
281 HPICMN_PAD_OFS_AND_SIZE(c_artist), /* HPI_PAD_ARTIST */
282 HPICMN_PAD_OFS_AND_SIZE(c_title), /* HPI_PAD_TITLE */
283 HPICMN_PAD_OFS_AND_SIZE(c_comment), /* HPI_PAD_COMMENT */
284};
285
286/** CheckControlCache checks the cache and fills the struct hpi_response
287 * accordingly. It returns one if a cache hit occurred, zero otherwise.
288 */
289short hpi_check_control_cache(struct hpi_control_cache *p_cache,
290 struct hpi_message *phm, struct hpi_response *phr)
291{
292 short found = 1;
293 u16 control_index;
294 struct hpi_control_cache_info *pI;
295 struct hpi_control_cache_single *pC;
296 struct hpi_control_cache_pad *p_pad;
297
298 if (!find_control(phm, p_cache, &pI, &control_index))
299 return 0;
300
301 phr->error = 0;
302
303 /* pC is the default cached control strucure. May be cast to
304 something else in the following switch statement.
305 */
306 pC = (struct hpi_control_cache_single *)pI;
307 p_pad = (struct hpi_control_cache_pad *)pI;
308
309 switch (pI->control_type) {
310
311 case HPI_CONTROL_METER:
312 if (phm->u.c.attribute == HPI_METER_PEAK) {
313 phr->u.c.an_log_value[0] = pC->u.p.an_log_peak[0];
314 phr->u.c.an_log_value[1] = pC->u.p.an_log_peak[1];
315 } else if (phm->u.c.attribute == HPI_METER_RMS) {
316 phr->u.c.an_log_value[0] = pC->u.p.an_logRMS[0];
317 phr->u.c.an_log_value[1] = pC->u.p.an_logRMS[1];
318 } else
319 found = 0;
320 break;
321 case HPI_CONTROL_VOLUME:
322 if (phm->u.c.attribute == HPI_VOLUME_GAIN) {
323 phr->u.c.an_log_value[0] = pC->u.v.an_log[0];
324 phr->u.c.an_log_value[1] = pC->u.v.an_log[1];
325 } else
326 found = 0;
327 break;
328 case HPI_CONTROL_MULTIPLEXER:
329 if (phm->u.c.attribute == HPI_MULTIPLEXER_SOURCE) {
330 phr->u.c.param1 = pC->u.x.source_node_type;
331 phr->u.c.param2 = pC->u.x.source_node_index;
332 } else {
333 found = 0;
334 }
335 break;
336 case HPI_CONTROL_CHANNEL_MODE:
337 if (phm->u.c.attribute == HPI_CHANNEL_MODE_MODE)
338 phr->u.c.param1 = pC->u.m.mode;
339 else
340 found = 0;
341 break;
342 case HPI_CONTROL_LEVEL:
343 if (phm->u.c.attribute == HPI_LEVEL_GAIN) {
344 phr->u.c.an_log_value[0] = pC->u.l.an_log[0];
345 phr->u.c.an_log_value[1] = pC->u.l.an_log[1];
346 } else
347 found = 0;
348 break;
349 case HPI_CONTROL_TUNER:
3ee317fe
EB		 350 if (phm->u.c.attribute == HPI_TUNER_FREQ)
351 phr->u.c.param1 = pC->u.t.freq_ink_hz;
352 else if (phm->u.c.attribute == HPI_TUNER_BAND)
353 phr->u.c.param1 = pC->u.t.band;
354 else if ((phm->u.c.attribute == HPI_TUNER_LEVEL)
355 && (phm->u.c.param1 == HPI_TUNER_LEVEL_AVERAGE))
36ed8bdd
EB		 356 if (pC->u.t.level == HPI_ERROR_ILLEGAL_CACHE_VALUE) {
357 phr->u.c.param1 = 0;
358 phr->error =
359 HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
360 } else
361 phr->u.c.param1 = pC->u.t.level;
3ee317fe
EB		 362 else
363 found = 0;
719f82d3
EB		 364 break;
365 case HPI_CONTROL_AESEBU_RECEIVER:
366 if (phm->u.c.attribute == HPI_AESEBURX_ERRORSTATUS)
367 phr->u.c.param1 = pC->u.aes3rx.error_status;
368 else if (phm->u.c.attribute == HPI_AESEBURX_FORMAT)
369 phr->u.c.param1 = pC->u.aes3rx.source;
370 else
371 found = 0;
372 break;
373 case HPI_CONTROL_AESEBU_TRANSMITTER:
374 if (phm->u.c.attribute == HPI_AESEBUTX_FORMAT)
375 phr->u.c.param1 = pC->u.aes3tx.format;
376 else
377 found = 0;
378 break;
379 case HPI_CONTROL_TONEDETECTOR:
380 if (phm->u.c.attribute == HPI_TONEDETECTOR_STATE)
381 phr->u.c.param1 = pC->u.tone.state;
382 else
383 found = 0;
384 break;
385 case HPI_CONTROL_SILENCEDETECTOR:
386 if (phm->u.c.attribute == HPI_SILENCEDETECTOR_STATE) {
387 phr->u.c.param1 = pC->u.silence.state;
388 phr->u.c.param2 = pC->u.silence.count;
389 } else
390 found = 0;
391 break;
392 case HPI_CONTROL_MICROPHONE:
393 if (phm->u.c.attribute == HPI_MICROPHONE_PHANTOM_POWER)
394 phr->u.c.param1 = pC->u.phantom_power.state;
395 else
396 found = 0;
397 break;
398 case HPI_CONTROL_SAMPLECLOCK:
399 if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE)
400 phr->u.c.param1 = pC->u.clk.source;
401 else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE_INDEX) {
402 if (pC->u.clk.source_index ==
403 HPI_ERROR_ILLEGAL_CACHE_VALUE) {
404 phr->u.c.param1 = 0;
36ed8bdd
EB		 405 phr->error =
406 HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
719f82d3
EB		 407 } else
408 phr->u.c.param1 = pC->u.clk.source_index;
409 } else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SAMPLERATE)
410 phr->u.c.param1 = pC->u.clk.sample_rate;
411 else
412 found = 0;
413 break;
414 case HPI_CONTROL_PAD:
415
416 if (!(p_pad->field_valid_flags & (1 <<
417 HPI_CTL_ATTR_INDEX(phm->u.c.
418 attribute)))) {
419 phr->error = HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
420 break;
421 }
422
423 if (phm->u.c.attribute == HPI_PAD_PROGRAM_ID)
424 phr->u.c.param1 = p_pad->pI;
425 else if (phm->u.c.attribute == HPI_PAD_PROGRAM_TYPE)
426 phr->u.c.param1 = p_pad->pTY;
427 else {
428 unsigned int index =
429 HPI_CTL_ATTR_INDEX(phm->u.c.attribute) - 1;
430 unsigned int offset = phm->u.c.param1;
431 unsigned int pad_string_len, field_size;
432 char *pad_string;
433 unsigned int tocopy;
434
435 HPI_DEBUG_LOG(VERBOSE, "PADS HPI_PADS_ %d\n",
436 phm->u.c.attribute);
437
438 if (index > ARRAY_SIZE(pad_desc) - 1) {
439 phr->error =
440 HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
441 break;
442 }
443
444 pad_string = ((char *)p_pad) + pad_desc[index].offset;
445 field_size = pad_desc[index].field_size;
446 /* Ensure null terminator */
447 pad_string[field_size - 1] = 0;
448
449 pad_string_len = strlen(pad_string) + 1;
450
451 if (offset > pad_string_len) {
452 phr->error = HPI_ERROR_INVALID_CONTROL_VALUE;
453 break;
454 }
455
456 tocopy = pad_string_len - offset;
457 if (tocopy > sizeof(phr->u.cu.chars8.sz_data))
458 tocopy = sizeof(phr->u.cu.chars8.sz_data);
459
460 HPI_DEBUG_LOG(VERBOSE,
461 "PADS memcpy(%d), offset %d \n", tocopy,
462 offset);
463 memcpy(phr->u.cu.chars8.sz_data, &pad_string[offset],
464 tocopy);
465
466 phr->u.cu.chars8.remaining_chars =
467 pad_string_len - offset - tocopy;
468 }
469 break;
470 default:
471 found = 0;
472 break;
473 }
474
475 if (found)
476 HPI_DEBUG_LOG(VERBOSE,
477 "cached adap %d, ctl %d, type %d, attr %d\n",
478 phm->adapter_index, pI->control_index,
479 pI->control_type, phm->u.c.attribute);
480 else
481 HPI_DEBUG_LOG(VERBOSE,
482 "uncached adap %d, ctl %d, ctl type %d\n",
483 phm->adapter_index, pI->control_index,
484 pI->control_type);
485
486 if (found)
487 phr->size =
488 sizeof(struct hpi_response_header) +
489 sizeof(struct hpi_control_res);
490
491 return found;
492}
493
494/** Updates the cache with Set values.
495
496Only update if no error.
497Volume and Level return the limited values in the response, so use these
498Multiplexer does so use sent values
499*/
500void hpi_sync_control_cache(struct hpi_control_cache *p_cache,
501 struct hpi_message *phm, struct hpi_response *phr)
502{
503 u16 control_index;
504 struct hpi_control_cache_single *pC;
505 struct hpi_control_cache_info *pI;
506
3ee317fe
EB		 507 if (phr->error)
508 return;
509
719f82d3
EB		 510 if (!find_control(phm, p_cache, &pI, &control_index))
511 return;
512
513 /* pC is the default cached control strucure.
514 May be cast to something else in the following switch statement.
515 */
516 pC = (struct hpi_control_cache_single *)pI;
517
518 switch (pI->control_type) {
519 case HPI_CONTROL_VOLUME:
520 if (phm->u.c.attribute == HPI_VOLUME_GAIN) {
521 pC->u.v.an_log[0] = phr->u.c.an_log_value[0];
522 pC->u.v.an_log[1] = phr->u.c.an_log_value[1];
523 }
524 break;
525 case HPI_CONTROL_MULTIPLEXER:
526 /* mux does not return its setting on Set command. */
719f82d3
EB		 527 if (phm->u.c.attribute == HPI_MULTIPLEXER_SOURCE) {
528 pC->u.x.source_node_type = (u16)phm->u.c.param1;
529 pC->u.x.source_node_index = (u16)phm->u.c.param2;
530 }
531 break;
532 case HPI_CONTROL_CHANNEL_MODE:
533 /* mode does not return its setting on Set command. */
719f82d3
EB		 534 if (phm->u.c.attribute == HPI_CHANNEL_MODE_MODE)
535 pC->u.m.mode = (u16)phm->u.c.param1;
536 break;
537 case HPI_CONTROL_LEVEL:
538 if (phm->u.c.attribute == HPI_LEVEL_GAIN) {
539 pC->u.v.an_log[0] = phr->u.c.an_log_value[0];
540 pC->u.v.an_log[1] = phr->u.c.an_log_value[1];
541 }
542 break;
543 case HPI_CONTROL_MICROPHONE:
544 if (phm->u.c.attribute == HPI_MICROPHONE_PHANTOM_POWER)
545 pC->u.phantom_power.state = (u16)phm->u.c.param1;
546 break;
547 case HPI_CONTROL_AESEBU_TRANSMITTER:
719f82d3
EB		 548 if (phm->u.c.attribute == HPI_AESEBUTX_FORMAT)
549 pC->u.aes3tx.format = phm->u.c.param1;
550 break;
551 case HPI_CONTROL_AESEBU_RECEIVER:
719f82d3
EB		 552 if (phm->u.c.attribute == HPI_AESEBURX_FORMAT)
553 pC->u.aes3rx.source = phm->u.c.param1;
554 break;
555 case HPI_CONTROL_SAMPLECLOCK:
719f82d3
EB		 556 if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE)
557 pC->u.clk.source = (u16)phm->u.c.param1;
558 else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE_INDEX)
559 pC->u.clk.source_index = (u16)phm->u.c.param1;
560 else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SAMPLERATE)
561 pC->u.clk.sample_rate = phm->u.c.param1;
562 break;
563 default:
564 break;
565 }
566}
567
568struct hpi_control_cache *hpi_alloc_control_cache(const u32
569 number_of_controls, const u32 size_in_bytes,
570 struct hpi_control_cache_info *pDSP_control_buffer)
571{
572 struct hpi_control_cache *p_cache =
573 kmalloc(sizeof(*p_cache), GFP_KERNEL);
fd0977d0
JJ		 574 if (!p_cache)
575 return NULL;
576 p_cache->p_info =
577 kmalloc(sizeof(*p_cache->p_info) * number_of_controls,
578 GFP_KERNEL);
579 if (!p_cache->p_info) {
580 kfree(p_cache);
581 return NULL;
582 }
719f82d3
EB		 583 p_cache->cache_size_in_bytes = size_in_bytes;
584 p_cache->control_count = number_of_controls;
585 p_cache->p_cache =
586 (struct hpi_control_cache_single *)pDSP_control_buffer;
587 p_cache->init = 0;
719f82d3
EB		 588 return p_cache;
589}
590
591void hpi_free_control_cache(struct hpi_control_cache *p_cache)
592{
3ee317fe 593 if (p_cache->init) {
719f82d3
EB		 594 kfree(p_cache->p_info);
595 p_cache->p_info = NULL;
596 p_cache->init = 0;
597 kfree(p_cache);
598 }
599}
600
601static void subsys_message(struct hpi_message *phm, struct hpi_response *phr)
602{
603
604 switch (phm->function) {
605 case HPI_SUBSYS_OPEN:
606 case HPI_SUBSYS_CLOSE:
607 case HPI_SUBSYS_DRIVER_UNLOAD:
608 phr->error = 0;
609 break;
610 case HPI_SUBSYS_DRIVER_LOAD:
611 wipe_adapter_list();
612 hpios_alistlock_init(&adapters);
613 phr->error = 0;
614 break;
615 case HPI_SUBSYS_GET_INFO:
616 subsys_get_adapters(phr);
617 break;
618 case HPI_SUBSYS_CREATE_ADAPTER:
619 case HPI_SUBSYS_DELETE_ADAPTER:
620 phr->error = 0;
621 break;
622 default:
623 phr->error = HPI_ERROR_INVALID_FUNC;
624 break;
625 }
626}
627
628void HPI_COMMON(struct hpi_message *phm, struct hpi_response *phr)
629{
630 switch (phm->type) {
631 case HPI_TYPE_MESSAGE:
632 switch (phm->object) {
633 case HPI_OBJ_SUBSYSTEM:
634 subsys_message(phm, phr);
635 break;
636 }
637 break;
638
639 default:
640 phr->error = HPI_ERROR_INVALID_TYPE;
641 break;
642 }
643}
Clone of davem's net-next-2.6 tree