| 1 | /* |
| 2 | * Driver for the NXP SAA7164 PCIe bridge |
| 3 | * |
| 4 | * Copyright (c) 2009 Steven Toth <stoth@kernellabs.com> |
| 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 | * |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/wait.h> |
| 23 | |
| 24 | #include "saa7164.h" |
| 25 | |
| 26 | int saa7164_cmd_alloc_seqno(struct saa7164_dev *dev) |
| 27 | { |
| 28 | int i, ret = -1; |
| 29 | |
| 30 | mutex_lock(&dev->lock); |
| 31 | for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { |
| 32 | if (dev->cmds[i].inuse == 0) { |
| 33 | dev->cmds[i].inuse = 1; |
| 34 | dev->cmds[i].signalled = 0; |
| 35 | dev->cmds[i].timeout = 0; |
| 36 | ret = dev->cmds[i].seqno; |
| 37 | break; |
| 38 | } |
| 39 | } |
| 40 | mutex_unlock(&dev->lock); |
| 41 | |
| 42 | return ret; |
| 43 | } |
| 44 | |
| 45 | void saa7164_cmd_free_seqno(struct saa7164_dev *dev, u8 seqno) |
| 46 | { |
| 47 | mutex_lock(&dev->lock); |
| 48 | if ((dev->cmds[seqno].inuse == 1) && |
| 49 | (dev->cmds[seqno].seqno == seqno)) { |
| 50 | dev->cmds[seqno].inuse = 0; |
| 51 | dev->cmds[seqno].signalled = 0; |
| 52 | dev->cmds[seqno].timeout = 0; |
| 53 | } |
| 54 | mutex_unlock(&dev->lock); |
| 55 | } |
| 56 | |
| 57 | void saa7164_cmd_timeout_seqno(struct saa7164_dev *dev, u8 seqno) |
| 58 | { |
| 59 | mutex_lock(&dev->lock); |
| 60 | if ((dev->cmds[seqno].inuse == 1) && |
| 61 | (dev->cmds[seqno].seqno == seqno)) { |
| 62 | dev->cmds[seqno].timeout = 1; |
| 63 | } |
| 64 | mutex_unlock(&dev->lock); |
| 65 | } |
| 66 | |
| 67 | u32 saa7164_cmd_timeout_get(struct saa7164_dev *dev, u8 seqno) |
| 68 | { |
| 69 | int ret = 0; |
| 70 | |
| 71 | mutex_lock(&dev->lock); |
| 72 | if ((dev->cmds[seqno].inuse == 1) && |
| 73 | (dev->cmds[seqno].seqno == seqno)) { |
| 74 | ret = dev->cmds[seqno].timeout; |
| 75 | } |
| 76 | mutex_unlock(&dev->lock); |
| 77 | |
| 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | /* Commands to the f/w get marshelled to/from this code then onto the PCI |
| 82 | * -bus/c running buffer. */ |
| 83 | int saa7164_cmd_dequeue(struct saa7164_dev *dev) |
| 84 | { |
| 85 | int loop = 1; |
| 86 | int ret; |
| 87 | u32 timeout; |
| 88 | wait_queue_head_t *q = 0; |
| 89 | u8 tmp[512]; |
| 90 | dprintk(DBGLVL_CMD, "%s()\n", __func__); |
| 91 | |
| 92 | while (loop) { |
| 93 | |
| 94 | tmComResInfo_t tRsp = { 0, 0, 0, 0, 0, 0 }; |
| 95 | ret = saa7164_bus_get(dev, &tRsp, NULL, 1); |
| 96 | if (ret == SAA_ERR_EMPTY) |
| 97 | return SAA_OK; |
| 98 | |
| 99 | if (ret != SAA_OK) |
| 100 | return ret; |
| 101 | |
| 102 | q = &dev->cmds[tRsp.seqno].wait; |
| 103 | timeout = saa7164_cmd_timeout_get(dev, tRsp.seqno); |
| 104 | dprintk(DBGLVL_CMD, "%s() timeout = %d\n", __func__, timeout); |
| 105 | if (timeout) { |
| 106 | printk(KERN_ERR "found timed out command on the bus\n"); |
| 107 | |
| 108 | /* Clean the bus */ |
| 109 | ret = saa7164_bus_get(dev, &tRsp, &tmp, 0); |
| 110 | printk(KERN_ERR "ret = %x\n", ret); |
| 111 | if (ret == SAA_ERR_EMPTY) |
| 112 | /* Someone else already fetched the response */ |
| 113 | return SAA_OK; |
| 114 | |
| 115 | if (ret != SAA_OK) |
| 116 | return ret; |
| 117 | |
| 118 | if (tRsp.flags & PVC_CMDFLAG_CONTINUE) |
| 119 | printk(KERN_ERR "split response\n"); |
| 120 | else |
| 121 | saa7164_cmd_free_seqno(dev, tRsp.seqno); |
| 122 | |
| 123 | printk(KERN_ERR " timeout continue\n"); |
| 124 | continue; |
| 125 | } |
| 126 | |
| 127 | dprintk(DBGLVL_CMD, "%s() signalled seqno(%d) (for dequeue)\n", |
| 128 | __func__, tRsp.seqno); |
| 129 | dev->cmds[tRsp.seqno].signalled = 1; |
| 130 | wake_up(q); |
| 131 | return SAA_OK; |
| 132 | } |
| 133 | |
| 134 | return SAA_OK; |
| 135 | } |
| 136 | |
| 137 | int saa7164_cmd_set(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf) |
| 138 | { |
| 139 | tmComResBusInfo_t *bus = &dev->bus; |
| 140 | u8 cmd_sent; |
| 141 | u16 size, idx; |
| 142 | u32 cmds; |
| 143 | void *tmp; |
| 144 | int ret = -1; |
| 145 | |
| 146 | if (!msg) { |
| 147 | printk(KERN_ERR "%s() !msg\n", __func__); |
| 148 | return SAA_ERR_BAD_PARAMETER; |
| 149 | } |
| 150 | |
| 151 | mutex_lock(&dev->cmds[msg->id].lock); |
| 152 | |
| 153 | size = msg->size; |
| 154 | idx = 0; |
| 155 | cmds = size / bus->m_wMaxReqSize; |
| 156 | if (size % bus->m_wMaxReqSize == 0) |
| 157 | cmds -= 1; |
| 158 | |
| 159 | cmd_sent = 0; |
| 160 | |
| 161 | /* Split the request into smaller chunks */ |
| 162 | for (idx = 0; idx < cmds; idx++) { |
| 163 | |
| 164 | msg->flags |= SAA_CMDFLAG_CONTINUE; |
| 165 | msg->size = bus->m_wMaxReqSize; |
| 166 | tmp = buf + idx * bus->m_wMaxReqSize; |
| 167 | |
| 168 | ret = saa7164_bus_set(dev, msg, tmp); |
| 169 | if (ret != SAA_OK) { |
| 170 | printk(KERN_ERR "%s() set failed %d\n", __func__, ret); |
| 171 | |
| 172 | if (cmd_sent) { |
| 173 | ret = SAA_ERR_BUSY; |
| 174 | goto out; |
| 175 | } |
| 176 | ret = SAA_ERR_OVERFLOW; |
| 177 | goto out; |
| 178 | } |
| 179 | cmd_sent = 1; |
| 180 | } |
| 181 | |
| 182 | /* If not the last command... */ |
| 183 | if (idx != 0) |
| 184 | msg->flags &= ~SAA_CMDFLAG_CONTINUE; |
| 185 | |
| 186 | msg->size = size - idx * bus->m_wMaxReqSize; |
| 187 | |
| 188 | ret = saa7164_bus_set(dev, msg, buf + idx * bus->m_wMaxReqSize); |
| 189 | if (ret != SAA_OK) { |
| 190 | printk(KERN_ERR "%s() set last failed %d\n", __func__, ret); |
| 191 | |
| 192 | if (cmd_sent) { |
| 193 | ret = SAA_ERR_BUSY; |
| 194 | goto out; |
| 195 | } |
| 196 | ret = SAA_ERR_OVERFLOW; |
| 197 | goto out; |
| 198 | } |
| 199 | ret = SAA_OK; |
| 200 | |
| 201 | out: |
| 202 | mutex_unlock(&dev->cmds[msg->id].lock); |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | /* Wait for a signal event, without holding a mutex. Either return TIMEOUT if |
| 207 | * the event never occured, or SAA_OK if it was signaled during the wait. |
| 208 | */ |
| 209 | int saa7164_cmd_wait(struct saa7164_dev *dev, u8 seqno) |
| 210 | { |
| 211 | wait_queue_head_t *q = 0; |
| 212 | int ret = SAA_BUS_TIMEOUT; |
| 213 | unsigned long stamp; |
| 214 | int r; |
| 215 | |
| 216 | if (debug >= 4) |
| 217 | saa7164_bus_dump(dev); |
| 218 | |
| 219 | dprintk(DBGLVL_CMD, "%s(seqno=%d)\n", __func__, seqno); |
| 220 | |
| 221 | mutex_lock(&dev->lock); |
| 222 | if ((dev->cmds[seqno].inuse == 1) && |
| 223 | (dev->cmds[seqno].seqno == seqno)) { |
| 224 | q = &dev->cmds[seqno].wait; |
| 225 | } |
| 226 | mutex_unlock(&dev->lock); |
| 227 | |
| 228 | if (q) { |
| 229 | /* If we haven't been signalled we need to wait */ |
| 230 | if (dev->cmds[seqno].signalled == 0) { |
| 231 | stamp = jiffies; |
| 232 | dprintk(DBGLVL_CMD, |
| 233 | "%s(seqno=%d) Waiting (signalled=%d)\n", |
| 234 | __func__, seqno, dev->cmds[seqno].signalled); |
| 235 | |
| 236 | /* Wait for signalled to be flagged or timeout */ |
| 237 | /* In a highly stressed system this can easily extend |
| 238 | * into multiple seconds before the deferred worker |
| 239 | * is scheduled, and we're woken up via signal. |
| 240 | * We typically are signalled in < 50ms but it can |
| 241 | * take MUCH longer. |
| 242 | */ |
| 243 | wait_event_timeout(*q, dev->cmds[seqno].signalled, (HZ * waitsecs)); |
| 244 | r = time_before(jiffies, stamp + (HZ * waitsecs)); |
| 245 | if (r) |
| 246 | ret = SAA_OK; |
| 247 | else |
| 248 | saa7164_cmd_timeout_seqno(dev, seqno); |
| 249 | |
| 250 | dprintk(DBGLVL_CMD, "%s(seqno=%d) Waiting res = %d " |
| 251 | "(signalled=%d)\n", __func__, seqno, r, |
| 252 | dev->cmds[seqno].signalled); |
| 253 | } else |
| 254 | ret = SAA_OK; |
| 255 | } else |
| 256 | printk(KERN_ERR "%s(seqno=%d) seqno is invalid\n", |
| 257 | __func__, seqno); |
| 258 | |
| 259 | return ret; |
| 260 | } |
| 261 | |
| 262 | void saa7164_cmd_signal(struct saa7164_dev *dev, u8 seqno) |
| 263 | { |
| 264 | int i; |
| 265 | dprintk(DBGLVL_CMD, "%s()\n", __func__); |
| 266 | |
| 267 | mutex_lock(&dev->lock); |
| 268 | for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { |
| 269 | if (dev->cmds[i].inuse == 1) { |
| 270 | dprintk(DBGLVL_CMD, |
| 271 | "seqno %d inuse, sig = %d, t/out = %d\n", |
| 272 | dev->cmds[i].seqno, |
| 273 | dev->cmds[i].signalled, |
| 274 | dev->cmds[i].timeout); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { |
| 279 | if ((dev->cmds[i].inuse == 1) && ((i == 0) || |
| 280 | (dev->cmds[i].signalled) || (dev->cmds[i].timeout))) { |
| 281 | dprintk(DBGLVL_CMD, "%s(seqno=%d) calling wake_up\n", |
| 282 | __func__, i); |
| 283 | dev->cmds[i].signalled = 1; |
| 284 | wake_up(&dev->cmds[i].wait); |
| 285 | } |
| 286 | } |
| 287 | mutex_unlock(&dev->lock); |
| 288 | } |
| 289 | |
| 290 | int saa7164_cmd_send(struct saa7164_dev *dev, u8 id, tmComResCmd_t command, |
| 291 | u16 controlselector, u16 size, void *buf) |
| 292 | { |
| 293 | tmComResInfo_t command_t, *pcommand_t; |
| 294 | tmComResInfo_t response_t, *presponse_t; |
| 295 | u8 errdata[256]; |
| 296 | u16 resp_dsize; |
| 297 | u16 data_recd; |
| 298 | u32 loop; |
| 299 | int ret; |
| 300 | int safety = 0; |
| 301 | |
| 302 | dprintk(DBGLVL_CMD, "%s(unitid = %s (%d) , command = 0x%x, " |
| 303 | "sel = 0x%x)\n", __func__, saa7164_unitid_name(dev, id), id, |
| 304 | command, controlselector); |
| 305 | |
| 306 | if ((size == 0) || (buf == 0)) { |
| 307 | printk(KERN_ERR "%s() Invalid param\n", __func__); |
| 308 | return SAA_ERR_BAD_PARAMETER; |
| 309 | } |
| 310 | |
| 311 | /* Prepare some basic command/response structures */ |
| 312 | memset(&command_t, 0, sizeof(command_t)); |
| 313 | memset(&response_t, 0, sizeof(&response_t)); |
| 314 | pcommand_t = &command_t; |
| 315 | presponse_t = &response_t; |
| 316 | command_t.id = id; |
| 317 | command_t.command = command; |
| 318 | command_t.controlselector = controlselector; |
| 319 | command_t.size = size; |
| 320 | |
| 321 | /* Allocate a unique sequence number */ |
| 322 | ret = saa7164_cmd_alloc_seqno(dev); |
| 323 | if (ret < 0) { |
| 324 | printk(KERN_ERR "%s() No free sequences\n", __func__); |
| 325 | ret = SAA_ERR_NO_RESOURCES; |
| 326 | goto out; |
| 327 | } |
| 328 | |
| 329 | command_t.seqno = (u8)ret; |
| 330 | |
| 331 | /* Send Command */ |
| 332 | resp_dsize = size; |
| 333 | pcommand_t->size = size; |
| 334 | |
| 335 | dprintk(DBGLVL_CMD, "%s() pcommand_t.seqno = %d\n", |
| 336 | __func__, pcommand_t->seqno); |
| 337 | |
| 338 | dprintk(DBGLVL_CMD, "%s() pcommand_t.size = %d\n", |
| 339 | __func__, pcommand_t->size); |
| 340 | |
| 341 | ret = saa7164_cmd_set(dev, pcommand_t, buf); |
| 342 | if (ret != SAA_OK) { |
| 343 | printk(KERN_ERR "%s() set command failed %d\n", __func__, ret); |
| 344 | |
| 345 | if (ret != SAA_ERR_BUSY) |
| 346 | saa7164_cmd_free_seqno(dev, pcommand_t->seqno); |
| 347 | else |
| 348 | /* Flag a timeout, because at least one |
| 349 | * command was sent */ |
| 350 | saa7164_cmd_timeout_seqno(dev, pcommand_t->seqno); |
| 351 | |
| 352 | goto out; |
| 353 | } |
| 354 | |
| 355 | /* With split responses we have to collect the msgs piece by piece */ |
| 356 | data_recd = 0; |
| 357 | loop = 1; |
| 358 | while (loop) { |
| 359 | dprintk(DBGLVL_CMD, "%s() loop\n", __func__); |
| 360 | |
| 361 | ret = saa7164_cmd_wait(dev, pcommand_t->seqno); |
| 362 | dprintk(DBGLVL_CMD, "%s() loop ret = %d\n", __func__, ret); |
| 363 | |
| 364 | /* if power is down and this is not a power command ... */ |
| 365 | |
| 366 | if (ret == SAA_BUS_TIMEOUT) { |
| 367 | printk(KERN_ERR "Event timed out\n"); |
| 368 | saa7164_cmd_timeout_seqno(dev, pcommand_t->seqno); |
| 369 | return ret; |
| 370 | } |
| 371 | |
| 372 | if (ret != SAA_OK) { |
| 373 | printk(KERN_ERR "spurious error\n"); |
| 374 | return ret; |
| 375 | } |
| 376 | |
| 377 | /* Peek response */ |
| 378 | ret = saa7164_bus_get(dev, presponse_t, NULL, 1); |
| 379 | if (ret == SAA_ERR_EMPTY) { |
| 380 | dprintk(4, "%s() SAA_ERR_EMPTY\n", __func__); |
| 381 | continue; |
| 382 | } |
| 383 | if (ret != SAA_OK) { |
| 384 | printk(KERN_ERR "peek failed\n"); |
| 385 | return ret; |
| 386 | } |
| 387 | |
| 388 | dprintk(DBGLVL_CMD, "%s() presponse_t->seqno = %d\n", |
| 389 | __func__, presponse_t->seqno); |
| 390 | |
| 391 | dprintk(DBGLVL_CMD, "%s() presponse_t->flags = 0x%x\n", |
| 392 | __func__, presponse_t->flags); |
| 393 | |
| 394 | dprintk(DBGLVL_CMD, "%s() presponse_t->size = %d\n", |
| 395 | __func__, presponse_t->size); |
| 396 | |
| 397 | /* Check if the response was for our command */ |
| 398 | if (presponse_t->seqno != pcommand_t->seqno) { |
| 399 | |
| 400 | dprintk(DBGLVL_CMD, |
| 401 | "wrong event: seqno = %d, " |
| 402 | "expected seqno = %d, " |
| 403 | "will dequeue regardless\n", |
| 404 | presponse_t->seqno, pcommand_t->seqno); |
| 405 | |
| 406 | ret = saa7164_cmd_dequeue(dev); |
| 407 | if (ret != SAA_OK) { |
| 408 | printk(KERN_ERR "dequeue failed, ret = %d\n", |
| 409 | ret); |
| 410 | if (safety++ > 16) { |
| 411 | printk(KERN_ERR |
| 412 | "dequeue exceeded, safety exit\n"); |
| 413 | return SAA_ERR_BUSY; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | continue; |
| 418 | } |
| 419 | |
| 420 | if ((presponse_t->flags & PVC_RESPONSEFLAG_ERROR) != 0) { |
| 421 | |
| 422 | memset(&errdata[0], 0, sizeof(errdata)); |
| 423 | |
| 424 | ret = saa7164_bus_get(dev, presponse_t, &errdata[0], 0); |
| 425 | if (ret != SAA_OK) { |
| 426 | printk(KERN_ERR "get error(2)\n"); |
| 427 | return ret; |
| 428 | } |
| 429 | |
| 430 | saa7164_cmd_free_seqno(dev, pcommand_t->seqno); |
| 431 | |
| 432 | dprintk(DBGLVL_CMD, "%s() errdata %02x%02x%02x%02x\n", |
| 433 | __func__, errdata[0], errdata[1], errdata[2], |
| 434 | errdata[3]); |
| 435 | |
| 436 | /* Map error codes */ |
| 437 | dprintk(DBGLVL_CMD, "%s() cmd, error code = 0x%x\n", |
| 438 | __func__, errdata[0]); |
| 439 | |
| 440 | switch (errdata[0]) { |
| 441 | case PVC_ERRORCODE_INVALID_COMMAND: |
| 442 | dprintk(DBGLVL_CMD, "%s() INVALID_COMMAND\n", |
| 443 | __func__); |
| 444 | ret = SAA_ERR_INVALID_COMMAND; |
| 445 | break; |
| 446 | case PVC_ERRORCODE_INVALID_DATA: |
| 447 | dprintk(DBGLVL_CMD, "%s() INVALID_DATA\n", |
| 448 | __func__); |
| 449 | ret = SAA_ERR_BAD_PARAMETER; |
| 450 | break; |
| 451 | case PVC_ERRORCODE_TIMEOUT: |
| 452 | dprintk(DBGLVL_CMD, "%s() TIMEOUT\n", __func__); |
| 453 | ret = SAA_ERR_TIMEOUT; |
| 454 | break; |
| 455 | case PVC_ERRORCODE_NAK: |
| 456 | dprintk(DBGLVL_CMD, "%s() NAK\n", __func__); |
| 457 | ret = SAA_ERR_NULL_PACKET; |
| 458 | break; |
| 459 | case PVC_ERRORCODE_UNKNOWN: |
| 460 | case PVC_ERRORCODE_INVALID_CONTROL: |
| 461 | dprintk(DBGLVL_CMD, |
| 462 | "%s() UNKNOWN OR INVALID CONTROL\n", |
| 463 | __func__); |
| 464 | default: |
| 465 | dprintk(DBGLVL_CMD, "%s() UNKNOWN\n", __func__); |
| 466 | ret = SAA_ERR_NOT_SUPPORTED; |
| 467 | } |
| 468 | |
| 469 | /* See of other commands are on the bus */ |
| 470 | if (saa7164_cmd_dequeue(dev) != SAA_OK) |
| 471 | printk(KERN_ERR "dequeue(2) failed\n"); |
| 472 | |
| 473 | return ret; |
| 474 | } |
| 475 | |
| 476 | /* If response is invalid */ |
| 477 | if ((presponse_t->id != pcommand_t->id) || |
| 478 | (presponse_t->command != pcommand_t->command) || |
| 479 | (presponse_t->controlselector != |
| 480 | pcommand_t->controlselector) || |
| 481 | (((resp_dsize - data_recd) != presponse_t->size) && |
| 482 | !(presponse_t->flags & PVC_CMDFLAG_CONTINUE)) || |
| 483 | ((resp_dsize - data_recd) < presponse_t->size)) { |
| 484 | |
| 485 | /* Invalid */ |
| 486 | dprintk(DBGLVL_CMD, "%s() Invalid\n", __func__); |
| 487 | ret = saa7164_bus_get(dev, presponse_t, 0, 0); |
| 488 | if (ret != SAA_OK) { |
| 489 | printk(KERN_ERR "get failed\n"); |
| 490 | return ret; |
| 491 | } |
| 492 | |
| 493 | /* See of other commands are on the bus */ |
| 494 | if (saa7164_cmd_dequeue(dev) != SAA_OK) |
| 495 | printk(KERN_ERR "dequeue(3) failed\n"); |
| 496 | continue; |
| 497 | } |
| 498 | |
| 499 | /* OK, now we're actually getting out correct response */ |
| 500 | ret = saa7164_bus_get(dev, presponse_t, buf + data_recd, 0); |
| 501 | if (ret != SAA_OK) { |
| 502 | printk(KERN_ERR "get failed\n"); |
| 503 | return ret; |
| 504 | } |
| 505 | |
| 506 | data_recd = presponse_t->size + data_recd; |
| 507 | if (resp_dsize == data_recd) { |
| 508 | dprintk(DBGLVL_CMD, "%s() Resp recd\n", __func__); |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | /* See of other commands are on the bus */ |
| 513 | if (saa7164_cmd_dequeue(dev) != SAA_OK) |
| 514 | printk(KERN_ERR "dequeue(3) failed\n"); |
| 515 | |
| 516 | continue; |
| 517 | |
| 518 | } /* (loop) */ |
| 519 | |
| 520 | /* Release the sequence number allocation */ |
| 521 | saa7164_cmd_free_seqno(dev, pcommand_t->seqno); |
| 522 | |
| 523 | /* if powerdown signal all pending commands */ |
| 524 | |
| 525 | dprintk(DBGLVL_CMD, "%s() Calling dequeue then exit\n", __func__); |
| 526 | |
| 527 | /* See of other commands are on the bus */ |
| 528 | if (saa7164_cmd_dequeue(dev) != SAA_OK) |
| 529 | printk(KERN_ERR "dequeue(4) failed\n"); |
| 530 | |
| 531 | ret = SAA_OK; |
| 532 | out: |
| 533 | return ret; |
| 534 | } |
| 535 | |