1 /* 2 * Driver for USB Mass Storage compliant devices 3 * SCSI layer glue code 4 * 5 * Current development and maintenance by: 6 * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 7 * 8 * Developed with the assistance of: 9 * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) 10 * (c) 2000 Stephen J. Gowdy (SGowdy@lbl.gov) 11 * 12 * Initial work by: 13 * (c) 1999 Michael Gee (michael@linuxspecific.com) 14 * 15 * This driver is based on the 'USB Mass Storage Class' document. This 16 * describes in detail the protocol used to communicate with such 17 * devices. Clearly, the designers had SCSI and ATAPI commands in 18 * mind when they created this document. The commands are all very 19 * similar to commands in the SCSI-II and ATAPI specifications. 20 * 21 * It is important to note that in a number of cases this class 22 * exhibits class-specific exemptions from the USB specification. 23 * Notably the usage of NAK, STALL and ACK differs from the norm, in 24 * that they are used to communicate wait, failed and OK on commands. 25 * 26 * Also, for certain devices, the interrupt endpoint is used to convey 27 * status of a command. 28 * 29 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 30 * information about this driver. 31 * 32 * This program is free software; you can redistribute it and/or modify it 33 * under the terms of the GNU General Public License as published by the 34 * Free Software Foundation; either version 2, or (at your option) any 35 * later version. 36 * 37 * This program is distributed in the hope that it will be useful, but 38 * WITHOUT ANY WARRANTY; without even the implied warranty of 39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 40 * General Public License for more details. 41 * 42 * You should have received a copy of the GNU General Public License along 43 * with this program; if not, write to the Free Software Foundation, Inc., 44 * 675 Mass Ave, Cambridge, MA 02139, USA. 45 */ 46 47 #include <linux/module.h> 48 #include <linux/mutex.h> 49 50 #include <scsi/scsi.h> 51 #include <scsi/scsi_cmnd.h> 52 #include <scsi/scsi_devinfo.h> 53 #include <scsi/scsi_device.h> 54 #include <scsi/scsi_eh.h> 55 56 #include "usb.h" 57 #include "scsiglue.h" 58 #include "debug.h" 59 #include "transport.h" 60 #include "protocol.h" 61 62 /* 63 * Vendor IDs for companies that seem to include the READ CAPACITY bug 64 * in all their devices 65 */ 66 #define VENDOR_ID_NOKIA 0x0421 67 #define VENDOR_ID_NIKON 0x04b0 68 #define VENDOR_ID_PENTAX 0x0a17 69 #define VENDOR_ID_MOTOROLA 0x22b8 70 71 /*********************************************************************** 72 * Host functions 73 ***********************************************************************/ 74 75 static const char* host_info(struct Scsi_Host *host) 76 { 77 struct us_data *us = host_to_us(host); 78 return us->scsi_name; 79 } 80 81 static int slave_alloc (struct scsi_device *sdev) 82 { 83 struct us_data *us = host_to_us(sdev->host); 84 85 /* 86 * Set the INQUIRY transfer length to 36. We don't use any of 87 * the extra data and many devices choke if asked for more or 88 * less than 36 bytes. 89 */ 90 sdev->inquiry_len = 36; 91 92 /* 93 * USB has unusual DMA-alignment requirements: Although the 94 * starting address of each scatter-gather element doesn't matter, 95 * the length of each element except the last must be divisible 96 * by the Bulk maxpacket value. There's currently no way to 97 * express this by block-layer constraints, so we'll cop out 98 * and simply require addresses to be aligned at 512-byte 99 * boundaries. This is okay since most block I/O involves 100 * hardware sectors that are multiples of 512 bytes in length, 101 * and since host controllers up through USB 2.0 have maxpacket 102 * values no larger than 512. 103 * 104 * But it doesn't suffice for Wireless USB, where Bulk maxpacket 105 * values can be as large as 2048. To make that work properly 106 * will require changes to the block layer. 107 */ 108 blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); 109 110 /* Tell the SCSI layer if we know there is more than one LUN */ 111 if (us->protocol == USB_PR_BULK && us->max_lun > 0) 112 sdev->sdev_bflags |= BLIST_FORCELUN; 113 114 return 0; 115 } 116 117 static int slave_configure(struct scsi_device *sdev) 118 { 119 struct us_data *us = host_to_us(sdev->host); 120 121 /* 122 * Many devices have trouble transferring more than 32KB at a time, 123 * while others have trouble with more than 64K. At this time we 124 * are limiting both to 32K (64 sectores). 125 */ 126 if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) { 127 unsigned int max_sectors = 64; 128 129 if (us->fflags & US_FL_MAX_SECTORS_MIN) 130 max_sectors = PAGE_SIZE >> 9; 131 if (queue_max_hw_sectors(sdev->request_queue) > max_sectors) 132 blk_queue_max_hw_sectors(sdev->request_queue, 133 max_sectors); 134 } else if (sdev->type == TYPE_TAPE) { 135 /* 136 * Tapes need much higher max_sector limits, so just 137 * raise it to the maximum possible (4 GB / 512) and 138 * let the queue segment size sort out the real limit. 139 */ 140 blk_queue_max_hw_sectors(sdev->request_queue, 0x7FFFFF); 141 } else if (us->pusb_dev->speed >= USB_SPEED_SUPER) { 142 /* 143 * USB3 devices will be limited to 2048 sectors. This gives us 144 * better throughput on most devices. 145 */ 146 blk_queue_max_hw_sectors(sdev->request_queue, 2048); 147 } 148 149 /* 150 * Some USB host controllers can't do DMA; they have to use PIO. 151 * They indicate this by setting their dma_mask to NULL. For 152 * such controllers we need to make sure the block layer sets 153 * up bounce buffers in addressable memory. 154 */ 155 if (!us->pusb_dev->bus->controller->dma_mask) 156 blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); 157 158 /* 159 * We can't put these settings in slave_alloc() because that gets 160 * called before the device type is known. Consequently these 161 * settings can't be overridden via the scsi devinfo mechanism. 162 */ 163 if (sdev->type == TYPE_DISK) { 164 165 /* 166 * Some vendors seem to put the READ CAPACITY bug into 167 * all their devices -- primarily makers of cell phones 168 * and digital cameras. Since these devices always use 169 * flash media and can be expected to have an even number 170 * of sectors, we will always enable the CAPACITY_HEURISTICS 171 * flag unless told otherwise. 172 */ 173 switch (le16_to_cpu(us->pusb_dev->descriptor.idVendor)) { 174 case VENDOR_ID_NOKIA: 175 case VENDOR_ID_NIKON: 176 case VENDOR_ID_PENTAX: 177 case VENDOR_ID_MOTOROLA: 178 if (!(us->fflags & (US_FL_FIX_CAPACITY | 179 US_FL_CAPACITY_OK))) 180 us->fflags |= US_FL_CAPACITY_HEURISTICS; 181 break; 182 } 183 184 /* 185 * Disk-type devices use MODE SENSE(6) if the protocol 186 * (SubClass) is Transparent SCSI, otherwise they use 187 * MODE SENSE(10). 188 */ 189 if (us->subclass != USB_SC_SCSI && us->subclass != USB_SC_CYP_ATACB) 190 sdev->use_10_for_ms = 1; 191 192 /* 193 *Many disks only accept MODE SENSE transfer lengths of 194 * 192 bytes (that's what Windows uses). 195 */ 196 sdev->use_192_bytes_for_3f = 1; 197 198 /* 199 * Some devices don't like MODE SENSE with page=0x3f, 200 * which is the command used for checking if a device 201 * is write-protected. Now that we tell the sd driver 202 * to do a 192-byte transfer with this command the 203 * majority of devices work fine, but a few still can't 204 * handle it. The sd driver will simply assume those 205 * devices are write-enabled. 206 */ 207 if (us->fflags & US_FL_NO_WP_DETECT) 208 sdev->skip_ms_page_3f = 1; 209 210 /* 211 * A number of devices have problems with MODE SENSE for 212 * page x08, so we will skip it. 213 */ 214 sdev->skip_ms_page_8 = 1; 215 216 /* Some devices don't handle VPD pages correctly */ 217 sdev->skip_vpd_pages = 1; 218 219 /* Do not attempt to use REPORT SUPPORTED OPERATION CODES */ 220 sdev->no_report_opcodes = 1; 221 222 /* Do not attempt to use WRITE SAME */ 223 sdev->no_write_same = 1; 224 225 /* 226 * Some disks return the total number of blocks in response 227 * to READ CAPACITY rather than the highest block number. 228 * If this device makes that mistake, tell the sd driver. 229 */ 230 if (us->fflags & US_FL_FIX_CAPACITY) 231 sdev->fix_capacity = 1; 232 233 /* 234 * A few disks have two indistinguishable version, one of 235 * which reports the correct capacity and the other does not. 236 * The sd driver has to guess which is the case. 237 */ 238 if (us->fflags & US_FL_CAPACITY_HEURISTICS) 239 sdev->guess_capacity = 1; 240 241 /* Some devices cannot handle READ_CAPACITY_16 */ 242 if (us->fflags & US_FL_NO_READ_CAPACITY_16) 243 sdev->no_read_capacity_16 = 1; 244 245 /* 246 * Many devices do not respond properly to READ_CAPACITY_16. 247 * Tell the SCSI layer to try READ_CAPACITY_10 first. 248 * However some USB 3.0 drive enclosures return capacity 249 * modulo 2TB. Those must use READ_CAPACITY_16 250 */ 251 if (!(us->fflags & US_FL_NEEDS_CAP16)) 252 sdev->try_rc_10_first = 1; 253 254 /* assume SPC3 or latter devices support sense size > 18 */ 255 if (sdev->scsi_level > SCSI_SPC_2) 256 us->fflags |= US_FL_SANE_SENSE; 257 258 /* 259 * USB-IDE bridges tend to report SK = 0x04 (Non-recoverable 260 * Hardware Error) when any low-level error occurs, 261 * recoverable or not. Setting this flag tells the SCSI 262 * midlayer to retry such commands, which frequently will 263 * succeed and fix the error. The worst this can lead to 264 * is an occasional series of retries that will all fail. 265 */ 266 sdev->retry_hwerror = 1; 267 268 /* 269 * USB disks should allow restart. Some drives spin down 270 * automatically, requiring a START-STOP UNIT command. 271 */ 272 sdev->allow_restart = 1; 273 274 /* 275 * Some USB cardreaders have trouble reading an sdcard's last 276 * sector in a larger then 1 sector read, since the performance 277 * impact is negligible we set this flag for all USB disks 278 */ 279 sdev->last_sector_bug = 1; 280 281 /* 282 * Enable last-sector hacks for single-target devices using 283 * the Bulk-only transport, unless we already know the 284 * capacity will be decremented or is correct. 285 */ 286 if (!(us->fflags & (US_FL_FIX_CAPACITY | US_FL_CAPACITY_OK | 287 US_FL_SCM_MULT_TARG)) && 288 us->protocol == USB_PR_BULK) 289 us->use_last_sector_hacks = 1; 290 291 /* Check if write cache default on flag is set or not */ 292 if (us->fflags & US_FL_WRITE_CACHE) 293 sdev->wce_default_on = 1; 294 295 /* A few buggy USB-ATA bridges don't understand FUA */ 296 if (us->fflags & US_FL_BROKEN_FUA) 297 sdev->broken_fua = 1; 298 299 /* Some even totally fail to indicate a cache */ 300 if (us->fflags & US_FL_ALWAYS_SYNC) { 301 /* don't read caching information */ 302 sdev->skip_ms_page_8 = 1; 303 sdev->skip_ms_page_3f = 1; 304 /* assume sync is needed */ 305 sdev->wce_default_on = 1; 306 } 307 } else { 308 309 /* 310 * Non-disk-type devices don't need to blacklist any pages 311 * or to force 192-byte transfer lengths for MODE SENSE. 312 * But they do need to use MODE SENSE(10). 313 */ 314 sdev->use_10_for_ms = 1; 315 316 /* Some (fake) usb cdrom devices don't like READ_DISC_INFO */ 317 if (us->fflags & US_FL_NO_READ_DISC_INFO) 318 sdev->no_read_disc_info = 1; 319 } 320 321 /* 322 * The CB and CBI transports have no way to pass LUN values 323 * other than the bits in the second byte of a CDB. But those 324 * bits don't get set to the LUN value if the device reports 325 * scsi_level == 0 (UNKNOWN). Hence such devices must necessarily 326 * be single-LUN. 327 */ 328 if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) && 329 sdev->scsi_level == SCSI_UNKNOWN) 330 us->max_lun = 0; 331 332 /* 333 * Some devices choke when they receive a PREVENT-ALLOW MEDIUM 334 * REMOVAL command, so suppress those commands. 335 */ 336 if (us->fflags & US_FL_NOT_LOCKABLE) 337 sdev->lockable = 0; 338 339 /* 340 * this is to satisfy the compiler, tho I don't think the 341 * return code is ever checked anywhere. 342 */ 343 return 0; 344 } 345 346 static int target_alloc(struct scsi_target *starget) 347 { 348 struct us_data *us = host_to_us(dev_to_shost(starget->dev.parent)); 349 350 /* 351 * Some USB drives don't support REPORT LUNS, even though they 352 * report a SCSI revision level above 2. Tell the SCSI layer 353 * not to issue that command; it will perform a normal sequential 354 * scan instead. 355 */ 356 starget->no_report_luns = 1; 357 358 /* 359 * The UFI spec treats the Peripheral Qualifier bits in an 360 * INQUIRY result as reserved and requires devices to set them 361 * to 0. However the SCSI spec requires these bits to be set 362 * to 3 to indicate when a LUN is not present. 363 * 364 * Let the scanning code know if this target merely sets 365 * Peripheral Device Type to 0x1f to indicate no LUN. 366 */ 367 if (us->subclass == USB_SC_UFI) 368 starget->pdt_1f_for_no_lun = 1; 369 370 return 0; 371 } 372 373 /* queue a command */ 374 /* This is always called with scsi_lock(host) held */ 375 static int queuecommand_lck(struct scsi_cmnd *srb, 376 void (*done)(struct scsi_cmnd *)) 377 { 378 struct us_data *us = host_to_us(srb->device->host); 379 380 /* check for state-transition errors */ 381 if (us->srb != NULL) { 382 printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n", 383 __func__, us->srb); 384 return SCSI_MLQUEUE_HOST_BUSY; 385 } 386 387 /* fail the command if we are disconnecting */ 388 if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { 389 usb_stor_dbg(us, "Fail command during disconnect\n"); 390 srb->result = DID_NO_CONNECT << 16; 391 done(srb); 392 return 0; 393 } 394 395 /* enqueue the command and wake up the control thread */ 396 srb->scsi_done = done; 397 us->srb = srb; 398 complete(&us->cmnd_ready); 399 400 return 0; 401 } 402 403 static DEF_SCSI_QCMD(queuecommand) 404 405 /*********************************************************************** 406 * Error handling functions 407 ***********************************************************************/ 408 409 /* Command timeout and abort */ 410 static int command_abort(struct scsi_cmnd *srb) 411 { 412 struct us_data *us = host_to_us(srb->device->host); 413 414 usb_stor_dbg(us, "%s called\n", __func__); 415 416 /* 417 * us->srb together with the TIMED_OUT, RESETTING, and ABORTING 418 * bits are protected by the host lock. 419 */ 420 scsi_lock(us_to_host(us)); 421 422 /* Is this command still active? */ 423 if (us->srb != srb) { 424 scsi_unlock(us_to_host(us)); 425 usb_stor_dbg(us, "-- nothing to abort\n"); 426 return FAILED; 427 } 428 429 /* 430 * Set the TIMED_OUT bit. Also set the ABORTING bit, but only if 431 * a device reset isn't already in progress (to avoid interfering 432 * with the reset). Note that we must retain the host lock while 433 * calling usb_stor_stop_transport(); otherwise it might interfere 434 * with an auto-reset that begins as soon as we release the lock. 435 */ 436 set_bit(US_FLIDX_TIMED_OUT, &us->dflags); 437 if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) { 438 set_bit(US_FLIDX_ABORTING, &us->dflags); 439 usb_stor_stop_transport(us); 440 } 441 scsi_unlock(us_to_host(us)); 442 443 /* Wait for the aborted command to finish */ 444 wait_for_completion(&us->notify); 445 return SUCCESS; 446 } 447 448 /* 449 * This invokes the transport reset mechanism to reset the state of the 450 * device 451 */ 452 static int device_reset(struct scsi_cmnd *srb) 453 { 454 struct us_data *us = host_to_us(srb->device->host); 455 int result; 456 457 usb_stor_dbg(us, "%s called\n", __func__); 458 459 /* lock the device pointers and do the reset */ 460 mutex_lock(&(us->dev_mutex)); 461 result = us->transport_reset(us); 462 mutex_unlock(&us->dev_mutex); 463 464 return result < 0 ? FAILED : SUCCESS; 465 } 466 467 /* Simulate a SCSI bus reset by resetting the device's USB port. */ 468 static int bus_reset(struct scsi_cmnd *srb) 469 { 470 struct us_data *us = host_to_us(srb->device->host); 471 int result; 472 473 usb_stor_dbg(us, "%s called\n", __func__); 474 475 result = usb_stor_port_reset(us); 476 return result < 0 ? FAILED : SUCCESS; 477 } 478 479 /* 480 * Report a driver-initiated device reset to the SCSI layer. 481 * Calling this for a SCSI-initiated reset is unnecessary but harmless. 482 * The caller must own the SCSI host lock. 483 */ 484 void usb_stor_report_device_reset(struct us_data *us) 485 { 486 int i; 487 struct Scsi_Host *host = us_to_host(us); 488 489 scsi_report_device_reset(host, 0, 0); 490 if (us->fflags & US_FL_SCM_MULT_TARG) { 491 for (i = 1; i < host->max_id; ++i) 492 scsi_report_device_reset(host, 0, i); 493 } 494 } 495 496 /* 497 * Report a driver-initiated bus reset to the SCSI layer. 498 * Calling this for a SCSI-initiated reset is unnecessary but harmless. 499 * The caller must not own the SCSI host lock. 500 */ 501 void usb_stor_report_bus_reset(struct us_data *us) 502 { 503 struct Scsi_Host *host = us_to_host(us); 504 505 scsi_lock(host); 506 scsi_report_bus_reset(host, 0); 507 scsi_unlock(host); 508 } 509 510 /*********************************************************************** 511 * /proc/scsi/ functions 512 ***********************************************************************/ 513 514 static int write_info(struct Scsi_Host *host, char *buffer, int length) 515 { 516 /* if someone is sending us data, just throw it away */ 517 return length; 518 } 519 520 static int show_info (struct seq_file *m, struct Scsi_Host *host) 521 { 522 struct us_data *us = host_to_us(host); 523 const char *string; 524 525 /* print the controller name */ 526 seq_printf(m, " Host scsi%d: usb-storage\n", host->host_no); 527 528 /* print product, vendor, and serial number strings */ 529 if (us->pusb_dev->manufacturer) 530 string = us->pusb_dev->manufacturer; 531 else if (us->unusual_dev->vendorName) 532 string = us->unusual_dev->vendorName; 533 else 534 string = "Unknown"; 535 seq_printf(m, " Vendor: %s\n", string); 536 if (us->pusb_dev->product) 537 string = us->pusb_dev->product; 538 else if (us->unusual_dev->productName) 539 string = us->unusual_dev->productName; 540 else 541 string = "Unknown"; 542 seq_printf(m, " Product: %s\n", string); 543 if (us->pusb_dev->serial) 544 string = us->pusb_dev->serial; 545 else 546 string = "None"; 547 seq_printf(m, "Serial Number: %s\n", string); 548 549 /* show the protocol and transport */ 550 seq_printf(m, " Protocol: %s\n", us->protocol_name); 551 seq_printf(m, " Transport: %s\n", us->transport_name); 552 553 /* show the device flags */ 554 seq_printf(m, " Quirks:"); 555 556 #define US_FLAG(name, value) \ 557 if (us->fflags & value) seq_printf(m, " " #name); 558 US_DO_ALL_FLAGS 559 #undef US_FLAG 560 seq_putc(m, '\n'); 561 return 0; 562 } 563 564 /*********************************************************************** 565 * Sysfs interface 566 ***********************************************************************/ 567 568 /* Output routine for the sysfs max_sectors file */ 569 static ssize_t max_sectors_show(struct device *dev, struct device_attribute *attr, char *buf) 570 { 571 struct scsi_device *sdev = to_scsi_device(dev); 572 573 return sprintf(buf, "%u\n", queue_max_hw_sectors(sdev->request_queue)); 574 } 575 576 /* Input routine for the sysfs max_sectors file */ 577 static ssize_t max_sectors_store(struct device *dev, struct device_attribute *attr, const char *buf, 578 size_t count) 579 { 580 struct scsi_device *sdev = to_scsi_device(dev); 581 unsigned short ms; 582 583 if (sscanf(buf, "%hu", &ms) > 0) { 584 blk_queue_max_hw_sectors(sdev->request_queue, ms); 585 return count; 586 } 587 return -EINVAL; 588 } 589 static DEVICE_ATTR_RW(max_sectors); 590 591 static struct device_attribute *sysfs_device_attr_list[] = { 592 &dev_attr_max_sectors, 593 NULL, 594 }; 595 596 /* 597 * this defines our host template, with which we'll allocate hosts 598 */ 599 600 static const struct scsi_host_template usb_stor_host_template = { 601 /* basic userland interface stuff */ 602 .name = "usb-storage", 603 .proc_name = "usb-storage", 604 .show_info = show_info, 605 .write_info = write_info, 606 .info = host_info, 607 608 /* command interface -- queued only */ 609 .queuecommand = queuecommand, 610 611 /* error and abort handlers */ 612 .eh_abort_handler = command_abort, 613 .eh_device_reset_handler = device_reset, 614 .eh_bus_reset_handler = bus_reset, 615 616 /* queue commands only, only one command per LUN */ 617 .can_queue = 1, 618 619 /* unknown initiator id */ 620 .this_id = -1, 621 622 .slave_alloc = slave_alloc, 623 .slave_configure = slave_configure, 624 .target_alloc = target_alloc, 625 626 /* lots of sg segments can be handled */ 627 .sg_tablesize = SG_MAX_SEGMENTS, 628 629 630 /* 631 * Limit the total size of a transfer to 120 KB. 632 * 633 * Some devices are known to choke with anything larger. It seems like 634 * the problem stems from the fact that original IDE controllers had 635 * only an 8-bit register to hold the number of sectors in one transfer 636 * and even those couldn't handle a full 256 sectors. 637 * 638 * Because we want to make sure we interoperate with as many devices as 639 * possible, we will maintain a 240 sector transfer size limit for USB 640 * Mass Storage devices. 641 * 642 * Tests show that other operating have similar limits with Microsoft 643 * Windows 7 limiting transfers to 128 sectors for both USB2 and USB3 644 * and Apple Mac OS X 10.11 limiting transfers to 256 sectors for USB2 645 * and 2048 for USB3 devices. 646 */ 647 .max_sectors = 240, 648 649 /* 650 * merge commands... this seems to help performance, but 651 * periodically someone should test to see which setting is more 652 * optimal. 653 */ 654 .use_clustering = 1, 655 656 /* emulated HBA */ 657 .emulated = 1, 658 659 /* we do our own delay after a device or bus reset */ 660 .skip_settle_delay = 1, 661 662 /* sysfs device attributes */ 663 .sdev_attrs = sysfs_device_attr_list, 664 665 /* module management */ 666 .module = THIS_MODULE 667 }; 668 669 void usb_stor_host_template_init(struct scsi_host_template *sht, 670 const char *name, struct module *owner) 671 { 672 *sht = usb_stor_host_template; 673 sht->name = name; 674 sht->proc_name = name; 675 sht->module = owner; 676 } 677 EXPORT_SYMBOL_GPL(usb_stor_host_template_init); 678 679 /* To Report "Illegal Request: Invalid Field in CDB */ 680 unsigned char usb_stor_sense_invalidCDB[18] = { 681 [0] = 0x70, /* current error */ 682 [2] = ILLEGAL_REQUEST, /* Illegal Request = 0x05 */ 683 [7] = 0x0a, /* additional length */ 684 [12] = 0x24 /* Invalid Field in CDB */ 685 }; 686 EXPORT_SYMBOL_GPL(usb_stor_sense_invalidCDB); 687