1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * USB device quirk handling logic and table 4 * 5 * Copyright (c) 2007 Oliver Neukum 6 * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de> 7 */ 8 9 #include <linux/moduleparam.h> 10 #include <linux/usb.h> 11 #include <linux/usb/quirks.h> 12 #include <linux/usb/hcd.h> 13 #include "usb.h" 14 15 struct quirk_entry { 16 u16 vid; 17 u16 pid; 18 u32 flags; 19 }; 20 21 static DEFINE_MUTEX(quirk_mutex); 22 23 static struct quirk_entry *quirk_list; 24 static unsigned int quirk_count; 25 26 static char quirks_param[128]; 27 28 static int quirks_param_set(const char *val, const struct kernel_param *kp) 29 { 30 char *p, *field; 31 u16 vid, pid; 32 u32 flags; 33 size_t i; 34 int err; 35 36 err = param_set_copystring(val, kp); 37 if (err) 38 return err; 39 40 mutex_lock(&quirk_mutex); 41 42 if (!*val) { 43 quirk_count = 0; 44 kfree(quirk_list); 45 quirk_list = NULL; 46 goto unlock; 47 } 48 49 for (quirk_count = 1, i = 0; val[i]; i++) 50 if (val[i] == ',') 51 quirk_count++; 52 53 if (quirk_list) { 54 kfree(quirk_list); 55 quirk_list = NULL; 56 } 57 58 quirk_list = kcalloc(quirk_count, sizeof(struct quirk_entry), 59 GFP_KERNEL); 60 if (!quirk_list) { 61 quirk_count = 0; 62 mutex_unlock(&quirk_mutex); 63 return -ENOMEM; 64 } 65 66 for (i = 0, p = (char *)val; p && *p;) { 67 /* Each entry consists of VID:PID:flags */ 68 field = strsep(&p, ":"); 69 if (!field) 70 break; 71 72 if (kstrtou16(field, 16, &vid)) 73 break; 74 75 field = strsep(&p, ":"); 76 if (!field) 77 break; 78 79 if (kstrtou16(field, 16, &pid)) 80 break; 81 82 field = strsep(&p, ","); 83 if (!field || !*field) 84 break; 85 86 /* Collect the flags */ 87 for (flags = 0; *field; field++) { 88 switch (*field) { 89 case 'a': 90 flags |= USB_QUIRK_STRING_FETCH_255; 91 break; 92 case 'b': 93 flags |= USB_QUIRK_RESET_RESUME; 94 break; 95 case 'c': 96 flags |= USB_QUIRK_NO_SET_INTF; 97 break; 98 case 'd': 99 flags |= USB_QUIRK_CONFIG_INTF_STRINGS; 100 break; 101 case 'e': 102 flags |= USB_QUIRK_RESET; 103 break; 104 case 'f': 105 flags |= USB_QUIRK_HONOR_BNUMINTERFACES; 106 break; 107 case 'g': 108 flags |= USB_QUIRK_DELAY_INIT; 109 break; 110 case 'h': 111 flags |= USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL; 112 break; 113 case 'i': 114 flags |= USB_QUIRK_DEVICE_QUALIFIER; 115 break; 116 case 'j': 117 flags |= USB_QUIRK_IGNORE_REMOTE_WAKEUP; 118 break; 119 case 'k': 120 flags |= USB_QUIRK_NO_LPM; 121 break; 122 case 'l': 123 flags |= USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL; 124 break; 125 case 'm': 126 flags |= USB_QUIRK_DISCONNECT_SUSPEND; 127 break; 128 case 'n': 129 flags |= USB_QUIRK_DELAY_CTRL_MSG; 130 break; 131 case 'o': 132 flags |= USB_QUIRK_HUB_SLOW_RESET; 133 break; 134 /* Ignore unrecognized flag characters */ 135 } 136 } 137 138 quirk_list[i++] = (struct quirk_entry) 139 { .vid = vid, .pid = pid, .flags = flags }; 140 } 141 142 if (i < quirk_count) 143 quirk_count = i; 144 145 unlock: 146 mutex_unlock(&quirk_mutex); 147 148 return 0; 149 } 150 151 static const struct kernel_param_ops quirks_param_ops = { 152 .set = quirks_param_set, 153 .get = param_get_string, 154 }; 155 156 static struct kparam_string quirks_param_string = { 157 .maxlen = sizeof(quirks_param), 158 .string = quirks_param, 159 }; 160 161 device_param_cb(quirks, &quirks_param_ops, &quirks_param_string, 0644); 162 MODULE_PARM_DESC(quirks, "Add/modify USB quirks by specifying quirks=vendorID:productID:quirks"); 163 164 /* Lists of quirky USB devices, split in device quirks and interface quirks. 165 * Device quirks are applied at the very beginning of the enumeration process, 166 * right after reading the device descriptor. They can thus only match on device 167 * information. 168 * 169 * Interface quirks are applied after reading all the configuration descriptors. 170 * They can match on both device and interface information. 171 * 172 * Note that the DELAY_INIT and HONOR_BNUMINTERFACES quirks do not make sense as 173 * interface quirks, as they only influence the enumeration process which is run 174 * before processing the interface quirks. 175 * 176 * Please keep the lists ordered by: 177 * 1) Vendor ID 178 * 2) Product ID 179 * 3) Class ID 180 */ 181 static const struct usb_device_id usb_quirk_list[] = { 182 /* CBM - Flash disk */ 183 { USB_DEVICE(0x0204, 0x6025), .driver_info = USB_QUIRK_RESET_RESUME }, 184 185 /* WORLDE Controller KS49 or Prodipe MIDI 49C USB controller */ 186 { USB_DEVICE(0x0218, 0x0201), .driver_info = 187 USB_QUIRK_CONFIG_INTF_STRINGS }, 188 189 /* WORLDE easy key (easykey.25) MIDI controller */ 190 { USB_DEVICE(0x0218, 0x0401), .driver_info = 191 USB_QUIRK_CONFIG_INTF_STRINGS }, 192 193 /* HP 5300/5370C scanner */ 194 { USB_DEVICE(0x03f0, 0x0701), .driver_info = 195 USB_QUIRK_STRING_FETCH_255 }, 196 197 /* HP v222w 16GB Mini USB Drive */ 198 { USB_DEVICE(0x03f0, 0x3f40), .driver_info = USB_QUIRK_DELAY_INIT }, 199 200 /* Creative SB Audigy 2 NX */ 201 { USB_DEVICE(0x041e, 0x3020), .driver_info = USB_QUIRK_RESET_RESUME }, 202 203 /* USB3503 */ 204 { USB_DEVICE(0x0424, 0x3503), .driver_info = USB_QUIRK_RESET_RESUME }, 205 206 /* Microsoft Wireless Laser Mouse 6000 Receiver */ 207 { USB_DEVICE(0x045e, 0x00e1), .driver_info = USB_QUIRK_RESET_RESUME }, 208 209 /* Microsoft LifeCam-VX700 v2.0 */ 210 { USB_DEVICE(0x045e, 0x0770), .driver_info = USB_QUIRK_RESET_RESUME }, 211 212 /* Logitech HD Pro Webcams C920, C920-C, C925e and C930e */ 213 { USB_DEVICE(0x046d, 0x082d), .driver_info = USB_QUIRK_DELAY_INIT }, 214 { USB_DEVICE(0x046d, 0x0841), .driver_info = USB_QUIRK_DELAY_INIT }, 215 { USB_DEVICE(0x046d, 0x0843), .driver_info = USB_QUIRK_DELAY_INIT }, 216 { USB_DEVICE(0x046d, 0x085b), .driver_info = USB_QUIRK_DELAY_INIT }, 217 218 /* Logitech ConferenceCam CC3000e */ 219 { USB_DEVICE(0x046d, 0x0847), .driver_info = USB_QUIRK_DELAY_INIT }, 220 { USB_DEVICE(0x046d, 0x0848), .driver_info = USB_QUIRK_DELAY_INIT }, 221 222 /* Logitech PTZ Pro Camera */ 223 { USB_DEVICE(0x046d, 0x0853), .driver_info = USB_QUIRK_DELAY_INIT }, 224 225 /* Logitech Quickcam Fusion */ 226 { USB_DEVICE(0x046d, 0x08c1), .driver_info = USB_QUIRK_RESET_RESUME }, 227 228 /* Logitech Quickcam Orbit MP */ 229 { USB_DEVICE(0x046d, 0x08c2), .driver_info = USB_QUIRK_RESET_RESUME }, 230 231 /* Logitech Quickcam Pro for Notebook */ 232 { USB_DEVICE(0x046d, 0x08c3), .driver_info = USB_QUIRK_RESET_RESUME }, 233 234 /* Logitech Quickcam Pro 5000 */ 235 { USB_DEVICE(0x046d, 0x08c5), .driver_info = USB_QUIRK_RESET_RESUME }, 236 237 /* Logitech Quickcam OEM Dell Notebook */ 238 { USB_DEVICE(0x046d, 0x08c6), .driver_info = USB_QUIRK_RESET_RESUME }, 239 240 /* Logitech Quickcam OEM Cisco VT Camera II */ 241 { USB_DEVICE(0x046d, 0x08c7), .driver_info = USB_QUIRK_RESET_RESUME }, 242 243 /* Logitech Harmony 700-series */ 244 { USB_DEVICE(0x046d, 0xc122), .driver_info = USB_QUIRK_DELAY_INIT }, 245 246 /* Philips PSC805 audio device */ 247 { USB_DEVICE(0x0471, 0x0155), .driver_info = USB_QUIRK_RESET_RESUME }, 248 249 /* Plantronic Audio 655 DSP */ 250 { USB_DEVICE(0x047f, 0xc008), .driver_info = USB_QUIRK_RESET_RESUME }, 251 252 /* Plantronic Audio 648 USB */ 253 { USB_DEVICE(0x047f, 0xc013), .driver_info = USB_QUIRK_RESET_RESUME }, 254 255 /* Artisman Watchdog Dongle */ 256 { USB_DEVICE(0x04b4, 0x0526), .driver_info = 257 USB_QUIRK_CONFIG_INTF_STRINGS }, 258 259 /* Microchip Joss Optical infrared touchboard device */ 260 { USB_DEVICE(0x04d8, 0x000c), .driver_info = 261 USB_QUIRK_CONFIG_INTF_STRINGS }, 262 263 /* CarrolTouch 4000U */ 264 { USB_DEVICE(0x04e7, 0x0009), .driver_info = USB_QUIRK_RESET_RESUME }, 265 266 /* CarrolTouch 4500U */ 267 { USB_DEVICE(0x04e7, 0x0030), .driver_info = USB_QUIRK_RESET_RESUME }, 268 269 /* Samsung Android phone modem - ID conflict with SPH-I500 */ 270 { USB_DEVICE(0x04e8, 0x6601), .driver_info = 271 USB_QUIRK_CONFIG_INTF_STRINGS }, 272 273 /* Elan Touchscreen */ 274 { USB_DEVICE(0x04f3, 0x0089), .driver_info = 275 USB_QUIRK_DEVICE_QUALIFIER }, 276 277 { USB_DEVICE(0x04f3, 0x009b), .driver_info = 278 USB_QUIRK_DEVICE_QUALIFIER }, 279 280 { USB_DEVICE(0x04f3, 0x010c), .driver_info = 281 USB_QUIRK_DEVICE_QUALIFIER }, 282 283 { USB_DEVICE(0x04f3, 0x0125), .driver_info = 284 USB_QUIRK_DEVICE_QUALIFIER }, 285 286 { USB_DEVICE(0x04f3, 0x016f), .driver_info = 287 USB_QUIRK_DEVICE_QUALIFIER }, 288 289 { USB_DEVICE(0x04f3, 0x0381), .driver_info = 290 USB_QUIRK_NO_LPM }, 291 292 { USB_DEVICE(0x04f3, 0x21b8), .driver_info = 293 USB_QUIRK_DEVICE_QUALIFIER }, 294 295 /* Roland SC-8820 */ 296 { USB_DEVICE(0x0582, 0x0007), .driver_info = USB_QUIRK_RESET_RESUME }, 297 298 /* Edirol SD-20 */ 299 { USB_DEVICE(0x0582, 0x0027), .driver_info = USB_QUIRK_RESET_RESUME }, 300 301 /* Alcor Micro Corp. Hub */ 302 { USB_DEVICE(0x058f, 0x9254), .driver_info = USB_QUIRK_RESET_RESUME }, 303 304 /* appletouch */ 305 { USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME }, 306 307 /* Genesys Logic hub, internally used by KY-688 USB 3.1 Type-C Hub */ 308 { USB_DEVICE(0x05e3, 0x0612), .driver_info = USB_QUIRK_NO_LPM }, 309 310 /* ELSA MicroLink 56K */ 311 { USB_DEVICE(0x05cc, 0x2267), .driver_info = USB_QUIRK_RESET_RESUME }, 312 313 /* Genesys Logic hub, internally used by Moshi USB to Ethernet Adapter */ 314 { USB_DEVICE(0x05e3, 0x0616), .driver_info = USB_QUIRK_NO_LPM }, 315 316 /* Avision AV600U */ 317 { USB_DEVICE(0x0638, 0x0a13), .driver_info = 318 USB_QUIRK_STRING_FETCH_255 }, 319 320 /* Saitek Cyborg Gold Joystick */ 321 { USB_DEVICE(0x06a3, 0x0006), .driver_info = 322 USB_QUIRK_CONFIG_INTF_STRINGS }, 323 324 /* Guillemot Webcam Hercules Dualpix Exchange (2nd ID) */ 325 { USB_DEVICE(0x06f8, 0x0804), .driver_info = USB_QUIRK_RESET_RESUME }, 326 327 /* Guillemot Webcam Hercules Dualpix Exchange*/ 328 { USB_DEVICE(0x06f8, 0x3005), .driver_info = USB_QUIRK_RESET_RESUME }, 329 330 /* Midiman M-Audio Keystation 88es */ 331 { USB_DEVICE(0x0763, 0x0192), .driver_info = USB_QUIRK_RESET_RESUME }, 332 333 /* M-Systems Flash Disk Pioneers */ 334 { USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME }, 335 336 /* Baum Vario Ultra */ 337 { USB_DEVICE(0x0904, 0x6101), .driver_info = 338 USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL }, 339 { USB_DEVICE(0x0904, 0x6102), .driver_info = 340 USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL }, 341 { USB_DEVICE(0x0904, 0x6103), .driver_info = 342 USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL }, 343 344 /* Keytouch QWERTY Panel keyboard */ 345 { USB_DEVICE(0x0926, 0x3333), .driver_info = 346 USB_QUIRK_CONFIG_INTF_STRINGS }, 347 348 /* X-Rite/Gretag-Macbeth Eye-One Pro display colorimeter */ 349 { USB_DEVICE(0x0971, 0x2000), .driver_info = USB_QUIRK_NO_SET_INTF }, 350 351 /* Broadcom BCM92035DGROM BT dongle */ 352 { USB_DEVICE(0x0a5c, 0x2021), .driver_info = USB_QUIRK_RESET_RESUME }, 353 354 /* MAYA44USB sound device */ 355 { USB_DEVICE(0x0a92, 0x0091), .driver_info = USB_QUIRK_RESET_RESUME }, 356 357 /* ASUS Base Station(T100) */ 358 { USB_DEVICE(0x0b05, 0x17e0), .driver_info = 359 USB_QUIRK_IGNORE_REMOTE_WAKEUP }, 360 361 /* Action Semiconductor flash disk */ 362 { USB_DEVICE(0x10d6, 0x2200), .driver_info = 363 USB_QUIRK_STRING_FETCH_255 }, 364 365 /* Huawei 4G LTE module */ 366 { USB_DEVICE(0x12d1, 0x15bb), .driver_info = 367 USB_QUIRK_DISCONNECT_SUSPEND }, 368 { USB_DEVICE(0x12d1, 0x15c3), .driver_info = 369 USB_QUIRK_DISCONNECT_SUSPEND }, 370 371 /* SKYMEDI USB_DRIVE */ 372 { USB_DEVICE(0x1516, 0x8628), .driver_info = USB_QUIRK_RESET_RESUME }, 373 374 /* Razer - Razer Blade Keyboard */ 375 { USB_DEVICE(0x1532, 0x0116), .driver_info = 376 USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL }, 377 378 /* BUILDWIN Photo Frame */ 379 { USB_DEVICE(0x1908, 0x1315), .driver_info = 380 USB_QUIRK_HONOR_BNUMINTERFACES }, 381 382 /* Protocol and OTG Electrical Test Device */ 383 { USB_DEVICE(0x1a0a, 0x0200), .driver_info = 384 USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL }, 385 386 /* Terminus Technology Inc. Hub */ 387 { USB_DEVICE(0x1a40, 0x0101), .driver_info = USB_QUIRK_HUB_SLOW_RESET }, 388 389 /* Corsair K70 RGB */ 390 { USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT }, 391 392 /* Corsair Strafe */ 393 { USB_DEVICE(0x1b1c, 0x1b15), .driver_info = USB_QUIRK_DELAY_INIT | 394 USB_QUIRK_DELAY_CTRL_MSG }, 395 396 /* Corsair Strafe RGB */ 397 { USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT | 398 USB_QUIRK_DELAY_CTRL_MSG }, 399 400 /* Corsair K70 LUX RGB */ 401 { USB_DEVICE(0x1b1c, 0x1b33), .driver_info = USB_QUIRK_DELAY_INIT }, 402 403 /* Corsair K70 LUX */ 404 { USB_DEVICE(0x1b1c, 0x1b36), .driver_info = USB_QUIRK_DELAY_INIT }, 405 406 /* MIDI keyboard WORLDE MINI */ 407 { USB_DEVICE(0x1c75, 0x0204), .driver_info = 408 USB_QUIRK_CONFIG_INTF_STRINGS }, 409 410 /* Acer C120 LED Projector */ 411 { USB_DEVICE(0x1de1, 0xc102), .driver_info = USB_QUIRK_NO_LPM }, 412 413 /* Blackmagic Design Intensity Shuttle */ 414 { USB_DEVICE(0x1edb, 0xbd3b), .driver_info = USB_QUIRK_NO_LPM }, 415 416 /* Blackmagic Design UltraStudio SDI */ 417 { USB_DEVICE(0x1edb, 0xbd4f), .driver_info = USB_QUIRK_NO_LPM }, 418 419 /* Hauppauge HVR-950q */ 420 { USB_DEVICE(0x2040, 0x7200), .driver_info = 421 USB_QUIRK_CONFIG_INTF_STRINGS }, 422 423 /* Raydium Touchscreen */ 424 { USB_DEVICE(0x2386, 0x3114), .driver_info = USB_QUIRK_NO_LPM }, 425 426 { USB_DEVICE(0x2386, 0x3119), .driver_info = USB_QUIRK_NO_LPM }, 427 428 /* DJI CineSSD */ 429 { USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM }, 430 431 /* INTEL VALUE SSD */ 432 { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME }, 433 434 { } /* terminating entry must be last */ 435 }; 436 437 static const struct usb_device_id usb_interface_quirk_list[] = { 438 /* Logitech UVC Cameras */ 439 { USB_VENDOR_AND_INTERFACE_INFO(0x046d, USB_CLASS_VIDEO, 1, 0), 440 .driver_info = USB_QUIRK_RESET_RESUME }, 441 442 { } /* terminating entry must be last */ 443 }; 444 445 static const struct usb_device_id usb_amd_resume_quirk_list[] = { 446 /* Lenovo Mouse with Pixart controller */ 447 { USB_DEVICE(0x17ef, 0x602e), .driver_info = USB_QUIRK_RESET_RESUME }, 448 449 /* Pixart Mouse */ 450 { USB_DEVICE(0x093a, 0x2500), .driver_info = USB_QUIRK_RESET_RESUME }, 451 { USB_DEVICE(0x093a, 0x2510), .driver_info = USB_QUIRK_RESET_RESUME }, 452 { USB_DEVICE(0x093a, 0x2521), .driver_info = USB_QUIRK_RESET_RESUME }, 453 { USB_DEVICE(0x03f0, 0x2b4a), .driver_info = USB_QUIRK_RESET_RESUME }, 454 455 /* Logitech Optical Mouse M90/M100 */ 456 { USB_DEVICE(0x046d, 0xc05a), .driver_info = USB_QUIRK_RESET_RESUME }, 457 458 { } /* terminating entry must be last */ 459 }; 460 461 static bool usb_match_any_interface(struct usb_device *udev, 462 const struct usb_device_id *id) 463 { 464 unsigned int i; 465 466 for (i = 0; i < udev->descriptor.bNumConfigurations; ++i) { 467 struct usb_host_config *cfg = &udev->config[i]; 468 unsigned int j; 469 470 for (j = 0; j < cfg->desc.bNumInterfaces; ++j) { 471 struct usb_interface_cache *cache; 472 struct usb_host_interface *intf; 473 474 cache = cfg->intf_cache[j]; 475 if (cache->num_altsetting == 0) 476 continue; 477 478 intf = &cache->altsetting[0]; 479 if (usb_match_one_id_intf(udev, intf, id)) 480 return true; 481 } 482 } 483 484 return false; 485 } 486 487 static int usb_amd_resume_quirk(struct usb_device *udev) 488 { 489 struct usb_hcd *hcd; 490 491 hcd = bus_to_hcd(udev->bus); 492 /* The device should be attached directly to root hub */ 493 if (udev->level == 1 && hcd->amd_resume_bug == 1) 494 return 1; 495 496 return 0; 497 } 498 499 static u32 usb_detect_static_quirks(struct usb_device *udev, 500 const struct usb_device_id *id) 501 { 502 u32 quirks = 0; 503 504 for (; id->match_flags; id++) { 505 if (!usb_match_device(udev, id)) 506 continue; 507 508 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_INFO) && 509 !usb_match_any_interface(udev, id)) 510 continue; 511 512 quirks |= (u32)(id->driver_info); 513 } 514 515 return quirks; 516 } 517 518 static u32 usb_detect_dynamic_quirks(struct usb_device *udev) 519 { 520 u16 vid = le16_to_cpu(udev->descriptor.idVendor); 521 u16 pid = le16_to_cpu(udev->descriptor.idProduct); 522 int i, flags = 0; 523 524 mutex_lock(&quirk_mutex); 525 526 for (i = 0; i < quirk_count; i++) { 527 if (vid == quirk_list[i].vid && pid == quirk_list[i].pid) { 528 flags = quirk_list[i].flags; 529 break; 530 } 531 } 532 533 mutex_unlock(&quirk_mutex); 534 535 return flags; 536 } 537 538 /* 539 * Detect any quirks the device has, and do any housekeeping for it if needed. 540 */ 541 void usb_detect_quirks(struct usb_device *udev) 542 { 543 udev->quirks = usb_detect_static_quirks(udev, usb_quirk_list); 544 545 /* 546 * Pixart-based mice would trigger remote wakeup issue on AMD 547 * Yangtze chipset, so set them as RESET_RESUME flag. 548 */ 549 if (usb_amd_resume_quirk(udev)) 550 udev->quirks |= usb_detect_static_quirks(udev, 551 usb_amd_resume_quirk_list); 552 553 udev->quirks ^= usb_detect_dynamic_quirks(udev); 554 555 if (udev->quirks) 556 dev_dbg(&udev->dev, "USB quirks for this device: %x\n", 557 udev->quirks); 558 559 #ifdef CONFIG_USB_DEFAULT_PERSIST 560 if (!(udev->quirks & USB_QUIRK_RESET)) 561 udev->persist_enabled = 1; 562 #else 563 /* Hubs are automatically enabled for USB-PERSIST */ 564 if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) 565 udev->persist_enabled = 1; 566 #endif /* CONFIG_USB_DEFAULT_PERSIST */ 567 } 568 569 void usb_detect_interface_quirks(struct usb_device *udev) 570 { 571 u32 quirks; 572 573 quirks = usb_detect_static_quirks(udev, usb_interface_quirk_list); 574 if (quirks == 0) 575 return; 576 577 dev_dbg(&udev->dev, "USB interface quirks for this device: %x\n", 578 quirks); 579 udev->quirks |= quirks; 580 } 581 582 void usb_release_quirk_list(void) 583 { 584 mutex_lock(&quirk_mutex); 585 kfree(quirk_list); 586 quirk_list = NULL; 587 mutex_unlock(&quirk_mutex); 588 } 589