// SPDX-License-Identifier: GPL-2.0+
|
/*
|
* Driver for USB Mass Storage compliant devices
|
* SCSI layer glue code
|
*
|
* Current development and maintenance by:
|
* (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
|
*
|
* Developed with the assistance of:
|
* (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
|
* (c) 2000 Stephen J. Gowdy (SGowdy@lbl.gov)
|
*
|
* Initial work by:
|
* (c) 1999 Michael Gee (michael@linuxspecific.com)
|
*
|
* This driver is based on the 'USB Mass Storage Class' document. This
|
* describes in detail the protocol used to communicate with such
|
* devices. Clearly, the designers had SCSI and ATAPI commands in
|
* mind when they created this document. The commands are all very
|
* similar to commands in the SCSI-II and ATAPI specifications.
|
*
|
* It is important to note that in a number of cases this class
|
* exhibits class-specific exemptions from the USB specification.
|
* Notably the usage of NAK, STALL and ACK differs from the norm, in
|
* that they are used to communicate wait, failed and OK on commands.
|
*
|
* Also, for certain devices, the interrupt endpoint is used to convey
|
* status of a command.
|
*/
|
|
#include <linux/blkdev.h>
|
#include <linux/dma-mapping.h>
|
#include <linux/module.h>
|
#include <linux/mutex.h>
|
|
#include <scsi/scsi.h>
|
#include <scsi/scsi_cmnd.h>
|
#include <scsi/scsi_devinfo.h>
|
#include <scsi/scsi_device.h>
|
#include <scsi/scsi_eh.h>
|
|
#include "usb.h"
|
#include <linux/usb/hcd.h>
|
#include "scsiglue.h"
|
#include "debug.h"
|
#include "transport.h"
|
#include "protocol.h"
|
|
/*
|
* Vendor IDs for companies that seem to include the READ CAPACITY bug
|
* in all their devices
|
*/
|
#define VENDOR_ID_NOKIA 0x0421
|
#define VENDOR_ID_NIKON 0x04b0
|
#define VENDOR_ID_PENTAX 0x0a17
|
#define VENDOR_ID_MOTOROLA 0x22b8
|
|
/***********************************************************************
|
* Host functions
|
***********************************************************************/
|
|
static const char* host_info(struct Scsi_Host *host)
|
{
|
struct us_data *us = host_to_us(host);
|
return us->scsi_name;
|
}
|
|
static int slave_alloc (struct scsi_device *sdev)
|
{
|
struct us_data *us = host_to_us(sdev->host);
|
|
/*
|
* Set the INQUIRY transfer length to 36. We don't use any of
|
* the extra data and many devices choke if asked for more or
|
* less than 36 bytes.
|
*/
|
sdev->inquiry_len = 36;
|
|
/*
|
* Some host controllers may have alignment requirements.
|
* We'll play it safe by requiring 512-byte alignment always.
|
*/
|
blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
|
|
/* Tell the SCSI layer if we know there is more than one LUN */
|
if (us->protocol == USB_PR_BULK && us->max_lun > 0)
|
sdev->sdev_bflags |= BLIST_FORCELUN;
|
|
return 0;
|
}
|
|
static int slave_configure(struct scsi_device *sdev)
|
{
|
struct us_data *us = host_to_us(sdev->host);
|
struct device *dev = us->pusb_dev->bus->sysdev;
|
|
/*
|
* Many devices have trouble transferring more than 32KB at a time,
|
* while others have trouble with more than 64K. At this time we
|
* are limiting both to 32K (64 sectores).
|
*/
|
if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) {
|
unsigned int max_sectors = 64;
|
|
if (le16_to_cpu(us->pusb_dev->descriptor.idVendor) == 0x05e3 &&
|
le16_to_cpu(us->pusb_dev->descriptor.idProduct) == 0x0749)
|
max_sectors = 128;
|
|
if (us->fflags & US_FL_MAX_SECTORS_MIN)
|
max_sectors = PAGE_SIZE >> 9;
|
if (queue_max_hw_sectors(sdev->request_queue) > max_sectors)
|
blk_queue_max_hw_sectors(sdev->request_queue,
|
max_sectors);
|
} else if (sdev->type == TYPE_TAPE) {
|
/*
|
* Tapes need much higher max_sector limits, so just
|
* raise it to the maximum possible (4 GB / 512) and
|
* let the queue segment size sort out the real limit.
|
*/
|
blk_queue_max_hw_sectors(sdev->request_queue, 0x7FFFFF);
|
} else if (us->pusb_dev->speed >= USB_SPEED_SUPER) {
|
/*
|
* USB3 devices will be limited to 2048 sectors. This gives us
|
* better throughput on most devices.
|
*/
|
blk_queue_max_hw_sectors(sdev->request_queue, 2048);
|
}
|
|
/*
|
* The max_hw_sectors should be up to maximum size of a mapping for
|
* the device. Otherwise, a DMA API might fail on swiotlb environment.
|
*/
|
blk_queue_max_hw_sectors(sdev->request_queue,
|
min_t(size_t, queue_max_hw_sectors(sdev->request_queue),
|
dma_max_mapping_size(dev) >> SECTOR_SHIFT));
|
|
/*
|
* Some USB host controllers can't do DMA; they have to use PIO.
|
* For such controllers we need to make sure the block layer sets
|
* up bounce buffers in addressable memory.
|
*/
|
if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)) ||
|
(bus_to_hcd(us->pusb_dev->bus)->localmem_pool != NULL))
|
blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH);
|
|
/*
|
* We can't put these settings in slave_alloc() because that gets
|
* called before the device type is known. Consequently these
|
* settings can't be overridden via the scsi devinfo mechanism.
|
*/
|
if (sdev->type == TYPE_DISK) {
|
|
/*
|
* Some vendors seem to put the READ CAPACITY bug into
|
* all their devices -- primarily makers of cell phones
|
* and digital cameras. Since these devices always use
|
* flash media and can be expected to have an even number
|
* of sectors, we will always enable the CAPACITY_HEURISTICS
|
* flag unless told otherwise.
|
*/
|
switch (le16_to_cpu(us->pusb_dev->descriptor.idVendor)) {
|
case VENDOR_ID_NOKIA:
|
case VENDOR_ID_NIKON:
|
case VENDOR_ID_PENTAX:
|
case VENDOR_ID_MOTOROLA:
|
if (!(us->fflags & (US_FL_FIX_CAPACITY |
|
US_FL_CAPACITY_OK)))
|
us->fflags |= US_FL_CAPACITY_HEURISTICS;
|
break;
|
}
|
|
/*
|
* Disk-type devices use MODE SENSE(6) if the protocol
|
* (SubClass) is Transparent SCSI, otherwise they use
|
* MODE SENSE(10).
|
*/
|
if (us->subclass != USB_SC_SCSI && us->subclass != USB_SC_CYP_ATACB)
|
sdev->use_10_for_ms = 1;
|
|
/*
|
*Many disks only accept MODE SENSE transfer lengths of
|
* 192 bytes (that's what Windows uses).
|
*/
|
sdev->use_192_bytes_for_3f = 1;
|
|
/*
|
* Some devices don't like MODE SENSE with page=0x3f,
|
* which is the command used for checking if a device
|
* is write-protected. Now that we tell the sd driver
|
* to do a 192-byte transfer with this command the
|
* majority of devices work fine, but a few still can't
|
* handle it. The sd driver will simply assume those
|
* devices are write-enabled.
|
*/
|
if (us->fflags & US_FL_NO_WP_DETECT)
|
sdev->skip_ms_page_3f = 1;
|
|
/*
|
* A number of devices have problems with MODE SENSE for
|
* page x08, so we will skip it.
|
*/
|
sdev->skip_ms_page_8 = 1;
|
|
/*
|
* Some devices don't handle VPD pages correctly, so skip vpd
|
* pages if not forced by SCSI layer.
|
*/
|
sdev->skip_vpd_pages = !sdev->try_vpd_pages;
|
|
/* Do not attempt to use REPORT SUPPORTED OPERATION CODES */
|
sdev->no_report_opcodes = 1;
|
|
/* Do not attempt to use WRITE SAME */
|
sdev->no_write_same = 1;
|
|
/*
|
* Some disks return the total number of blocks in response
|
* to READ CAPACITY rather than the highest block number.
|
* If this device makes that mistake, tell the sd driver.
|
*/
|
if (us->fflags & US_FL_FIX_CAPACITY)
|
sdev->fix_capacity = 1;
|
|
/*
|
* A few disks have two indistinguishable version, one of
|
* which reports the correct capacity and the other does not.
|
* The sd driver has to guess which is the case.
|
*/
|
if (us->fflags & US_FL_CAPACITY_HEURISTICS)
|
sdev->guess_capacity = 1;
|
|
/* Some devices cannot handle READ_CAPACITY_16 */
|
if (us->fflags & US_FL_NO_READ_CAPACITY_16)
|
sdev->no_read_capacity_16 = 1;
|
|
/*
|
* Many devices do not respond properly to READ_CAPACITY_16.
|
* Tell the SCSI layer to try READ_CAPACITY_10 first.
|
* However some USB 3.0 drive enclosures return capacity
|
* modulo 2TB. Those must use READ_CAPACITY_16
|
*/
|
if (!(us->fflags & US_FL_NEEDS_CAP16))
|
sdev->try_rc_10_first = 1;
|
|
/*
|
* assume SPC3 or latter devices support sense size > 18
|
* unless US_FL_BAD_SENSE quirk is specified.
|
*/
|
if (sdev->scsi_level > SCSI_SPC_2 &&
|
!(us->fflags & US_FL_BAD_SENSE))
|
us->fflags |= US_FL_SANE_SENSE;
|
|
/*
|
* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable
|
* Hardware Error) when any low-level error occurs,
|
* recoverable or not. Setting this flag tells the SCSI
|
* midlayer to retry such commands, which frequently will
|
* succeed and fix the error. The worst this can lead to
|
* is an occasional series of retries that will all fail.
|
*/
|
sdev->retry_hwerror = 1;
|
|
/*
|
* USB disks should allow restart. Some drives spin down
|
* automatically, requiring a START-STOP UNIT command.
|
*/
|
sdev->allow_restart = 1;
|
|
/*
|
* Some USB cardreaders have trouble reading an sdcard's last
|
* sector in a larger then 1 sector read, since the performance
|
* impact is negligible we set this flag for all USB disks
|
*/
|
sdev->last_sector_bug = 1;
|
|
/*
|
* Enable last-sector hacks for single-target devices using
|
* the Bulk-only transport, unless we already know the
|
* capacity will be decremented or is correct.
|
*/
|
if (!(us->fflags & (US_FL_FIX_CAPACITY | US_FL_CAPACITY_OK |
|
US_FL_SCM_MULT_TARG)) &&
|
us->protocol == USB_PR_BULK)
|
us->use_last_sector_hacks = 1;
|
|
/* Check if write cache default on flag is set or not */
|
if (us->fflags & US_FL_WRITE_CACHE)
|
sdev->wce_default_on = 1;
|
|
/* A few buggy USB-ATA bridges don't understand FUA */
|
if (us->fflags & US_FL_BROKEN_FUA)
|
sdev->broken_fua = 1;
|
|
/* Some even totally fail to indicate a cache */
|
if (us->fflags & US_FL_ALWAYS_SYNC) {
|
/* don't read caching information */
|
sdev->skip_ms_page_8 = 1;
|
sdev->skip_ms_page_3f = 1;
|
/* assume sync is needed */
|
sdev->wce_default_on = 1;
|
}
|
} else {
|
|
/*
|
* Non-disk-type devices don't need to ignore any pages
|
* or to force 192-byte transfer lengths for MODE SENSE.
|
* But they do need to use MODE SENSE(10).
|
*/
|
sdev->use_10_for_ms = 1;
|
|
/* Some (fake) usb cdrom devices don't like READ_DISC_INFO */
|
if (us->fflags & US_FL_NO_READ_DISC_INFO)
|
sdev->no_read_disc_info = 1;
|
}
|
|
/*
|
* The CB and CBI transports have no way to pass LUN values
|
* other than the bits in the second byte of a CDB. But those
|
* bits don't get set to the LUN value if the device reports
|
* scsi_level == 0 (UNKNOWN). Hence such devices must necessarily
|
* be single-LUN.
|
*/
|
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) &&
|
sdev->scsi_level == SCSI_UNKNOWN)
|
us->max_lun = 0;
|
|
/*
|
* Some devices choke when they receive a PREVENT-ALLOW MEDIUM
|
* REMOVAL command, so suppress those commands.
|
*/
|
if (us->fflags & US_FL_NOT_LOCKABLE)
|
sdev->lockable = 0;
|
|
/*
|
* this is to satisfy the compiler, tho I don't think the
|
* return code is ever checked anywhere.
|
*/
|
return 0;
|
}
|
|
static int target_alloc(struct scsi_target *starget)
|
{
|
struct us_data *us = host_to_us(dev_to_shost(starget->dev.parent));
|
|
/*
|
* Some USB drives don't support REPORT LUNS, even though they
|
* report a SCSI revision level above 2. Tell the SCSI layer
|
* not to issue that command; it will perform a normal sequential
|
* scan instead.
|
*/
|
starget->no_report_luns = 1;
|
|
/*
|
* The UFI spec treats the Peripheral Qualifier bits in an
|
* INQUIRY result as reserved and requires devices to set them
|
* to 0. However the SCSI spec requires these bits to be set
|
* to 3 to indicate when a LUN is not present.
|
*
|
* Let the scanning code know if this target merely sets
|
* Peripheral Device Type to 0x1f to indicate no LUN.
|
*/
|
if (us->subclass == USB_SC_UFI)
|
starget->pdt_1f_for_no_lun = 1;
|
|
return 0;
|
}
|
|
/* queue a command */
|
/* This is always called with scsi_lock(host) held */
|
static int queuecommand_lck(struct scsi_cmnd *srb,
|
void (*done)(struct scsi_cmnd *))
|
{
|
struct us_data *us = host_to_us(srb->device->host);
|
|
/* check for state-transition errors */
|
if (us->srb != NULL) {
|
dev_err(&us->pusb_intf->dev,
|
"Error in %s: us->srb = %p\n", __func__, us->srb);
|
return SCSI_MLQUEUE_HOST_BUSY;
|
}
|
|
/* fail the command if we are disconnecting */
|
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
|
usb_stor_dbg(us, "Fail command during disconnect\n");
|
srb->result = DID_NO_CONNECT << 16;
|
done(srb);
|
return 0;
|
}
|
|
if ((us->fflags & US_FL_NO_ATA_1X) &&
|
(srb->cmnd[0] == ATA_12 || srb->cmnd[0] == ATA_16)) {
|
memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB,
|
sizeof(usb_stor_sense_invalidCDB));
|
srb->result = SAM_STAT_CHECK_CONDITION;
|
done(srb);
|
return 0;
|
}
|
|
/* enqueue the command and wake up the control thread */
|
srb->scsi_done = done;
|
us->srb = srb;
|
complete(&us->cmnd_ready);
|
|
return 0;
|
}
|
|
static DEF_SCSI_QCMD(queuecommand)
|
|
/***********************************************************************
|
* Error handling functions
|
***********************************************************************/
|
|
/* Command timeout and abort */
|
static int command_abort_matching(struct us_data *us, struct scsi_cmnd *srb_match)
|
{
|
/*
|
* us->srb together with the TIMED_OUT, RESETTING, and ABORTING
|
* bits are protected by the host lock.
|
*/
|
scsi_lock(us_to_host(us));
|
|
/* is there any active pending command to abort ? */
|
if (!us->srb) {
|
scsi_unlock(us_to_host(us));
|
usb_stor_dbg(us, "-- nothing to abort\n");
|
return SUCCESS;
|
}
|
|
/* Does the command match the passed srb if any ? */
|
if (srb_match && us->srb != srb_match) {
|
scsi_unlock(us_to_host(us));
|
usb_stor_dbg(us, "-- pending command mismatch\n");
|
return FAILED;
|
}
|
|
/*
|
* Set the TIMED_OUT bit. Also set the ABORTING bit, but only if
|
* a device reset isn't already in progress (to avoid interfering
|
* with the reset). Note that we must retain the host lock while
|
* calling usb_stor_stop_transport(); otherwise it might interfere
|
* with an auto-reset that begins as soon as we release the lock.
|
*/
|
set_bit(US_FLIDX_TIMED_OUT, &us->dflags);
|
if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) {
|
set_bit(US_FLIDX_ABORTING, &us->dflags);
|
usb_stor_stop_transport(us);
|
}
|
scsi_unlock(us_to_host(us));
|
|
/* Wait for the aborted command to finish */
|
wait_for_completion(&us->notify);
|
return SUCCESS;
|
}
|
|
static int command_abort(struct scsi_cmnd *srb)
|
{
|
struct us_data *us = host_to_us(srb->device->host);
|
|
usb_stor_dbg(us, "%s called\n", __func__);
|
return command_abort_matching(us, srb);
|
}
|
|
/*
|
* This invokes the transport reset mechanism to reset the state of the
|
* device
|
*/
|
static int device_reset(struct scsi_cmnd *srb)
|
{
|
struct us_data *us = host_to_us(srb->device->host);
|
int result;
|
|
usb_stor_dbg(us, "%s called\n", __func__);
|
|
/* abort any pending command before reset */
|
command_abort_matching(us, NULL);
|
|
/* lock the device pointers and do the reset */
|
mutex_lock(&(us->dev_mutex));
|
result = us->transport_reset(us);
|
mutex_unlock(&us->dev_mutex);
|
|
return result < 0 ? FAILED : SUCCESS;
|
}
|
|
/* Simulate a SCSI bus reset by resetting the device's USB port. */
|
static int bus_reset(struct scsi_cmnd *srb)
|
{
|
struct us_data *us = host_to_us(srb->device->host);
|
int result;
|
|
usb_stor_dbg(us, "%s called\n", __func__);
|
|
result = usb_stor_port_reset(us);
|
return result < 0 ? FAILED : SUCCESS;
|
}
|
|
/*
|
* Report a driver-initiated device reset to the SCSI layer.
|
* Calling this for a SCSI-initiated reset is unnecessary but harmless.
|
* The caller must own the SCSI host lock.
|
*/
|
void usb_stor_report_device_reset(struct us_data *us)
|
{
|
int i;
|
struct Scsi_Host *host = us_to_host(us);
|
|
scsi_report_device_reset(host, 0, 0);
|
if (us->fflags & US_FL_SCM_MULT_TARG) {
|
for (i = 1; i < host->max_id; ++i)
|
scsi_report_device_reset(host, 0, i);
|
}
|
}
|
|
/*
|
* Report a driver-initiated bus reset to the SCSI layer.
|
* Calling this for a SCSI-initiated reset is unnecessary but harmless.
|
* The caller must not own the SCSI host lock.
|
*/
|
void usb_stor_report_bus_reset(struct us_data *us)
|
{
|
struct Scsi_Host *host = us_to_host(us);
|
|
scsi_lock(host);
|
scsi_report_bus_reset(host, 0);
|
scsi_unlock(host);
|
}
|
|
/***********************************************************************
|
* /proc/scsi/ functions
|
***********************************************************************/
|
|
static int write_info(struct Scsi_Host *host, char *buffer, int length)
|
{
|
/* if someone is sending us data, just throw it away */
|
return length;
|
}
|
|
static int show_info (struct seq_file *m, struct Scsi_Host *host)
|
{
|
struct us_data *us = host_to_us(host);
|
const char *string;
|
|
/* print the controller name */
|
seq_printf(m, " Host scsi%d: usb-storage\n", host->host_no);
|
|
/* print product, vendor, and serial number strings */
|
if (us->pusb_dev->manufacturer)
|
string = us->pusb_dev->manufacturer;
|
else if (us->unusual_dev->vendorName)
|
string = us->unusual_dev->vendorName;
|
else
|
string = "Unknown";
|
seq_printf(m, " Vendor: %s\n", string);
|
if (us->pusb_dev->product)
|
string = us->pusb_dev->product;
|
else if (us->unusual_dev->productName)
|
string = us->unusual_dev->productName;
|
else
|
string = "Unknown";
|
seq_printf(m, " Product: %s\n", string);
|
if (us->pusb_dev->serial)
|
string = us->pusb_dev->serial;
|
else
|
string = "None";
|
seq_printf(m, "Serial Number: %s\n", string);
|
|
/* show the protocol and transport */
|
seq_printf(m, " Protocol: %s\n", us->protocol_name);
|
seq_printf(m, " Transport: %s\n", us->transport_name);
|
|
/* show the device flags */
|
seq_printf(m, " Quirks:");
|
|
#define US_FLAG(name, value) \
|
if (us->fflags & value) seq_printf(m, " " #name);
|
US_DO_ALL_FLAGS
|
#undef US_FLAG
|
seq_putc(m, '\n');
|
return 0;
|
}
|
|
/***********************************************************************
|
* Sysfs interface
|
***********************************************************************/
|
|
/* Output routine for the sysfs max_sectors file */
|
static ssize_t max_sectors_show(struct device *dev, struct device_attribute *attr, char *buf)
|
{
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
return sprintf(buf, "%u\n", queue_max_hw_sectors(sdev->request_queue));
|
}
|
|
/* Input routine for the sysfs max_sectors file */
|
static ssize_t max_sectors_store(struct device *dev, struct device_attribute *attr, const char *buf,
|
size_t count)
|
{
|
struct scsi_device *sdev = to_scsi_device(dev);
|
unsigned short ms;
|
|
if (sscanf(buf, "%hu", &ms) > 0) {
|
blk_queue_max_hw_sectors(sdev->request_queue, ms);
|
return count;
|
}
|
return -EINVAL;
|
}
|
static DEVICE_ATTR_RW(max_sectors);
|
|
static struct device_attribute *sysfs_device_attr_list[] = {
|
&dev_attr_max_sectors,
|
NULL,
|
};
|
|
/*
|
* this defines our host template, with which we'll allocate hosts
|
*/
|
|
static const struct scsi_host_template usb_stor_host_template = {
|
/* basic userland interface stuff */
|
.name = "usb-storage",
|
.proc_name = "usb-storage",
|
.show_info = show_info,
|
.write_info = write_info,
|
.info = host_info,
|
|
/* command interface -- queued only */
|
.queuecommand = queuecommand,
|
|
/* error and abort handlers */
|
.eh_abort_handler = command_abort,
|
.eh_device_reset_handler = device_reset,
|
.eh_bus_reset_handler = bus_reset,
|
|
/* queue commands only, only one command per LUN */
|
.can_queue = 1,
|
|
/* unknown initiator id */
|
.this_id = -1,
|
|
.slave_alloc = slave_alloc,
|
.slave_configure = slave_configure,
|
.target_alloc = target_alloc,
|
|
/* lots of sg segments can be handled */
|
.sg_tablesize = SG_MAX_SEGMENTS,
|
|
|
/*
|
* Limit the total size of a transfer to 120 KB.
|
*
|
* Some devices are known to choke with anything larger. It seems like
|
* the problem stems from the fact that original IDE controllers had
|
* only an 8-bit register to hold the number of sectors in one transfer
|
* and even those couldn't handle a full 256 sectors.
|
*
|
* Because we want to make sure we interoperate with as many devices as
|
* possible, we will maintain a 240 sector transfer size limit for USB
|
* Mass Storage devices.
|
*
|
* Tests show that other operating have similar limits with Microsoft
|
* Windows 7 limiting transfers to 128 sectors for both USB2 and USB3
|
* and Apple Mac OS X 10.11 limiting transfers to 256 sectors for USB2
|
* and 2048 for USB3 devices.
|
*/
|
.max_sectors = 240,
|
|
/* emulated HBA */
|
.emulated = 1,
|
|
/* we do our own delay after a device or bus reset */
|
.skip_settle_delay = 1,
|
|
/* sysfs device attributes */
|
.sdev_attrs = sysfs_device_attr_list,
|
|
/* module management */
|
.module = THIS_MODULE
|
};
|
|
void usb_stor_host_template_init(struct scsi_host_template *sht,
|
const char *name, struct module *owner)
|
{
|
*sht = usb_stor_host_template;
|
sht->name = name;
|
sht->proc_name = name;
|
sht->module = owner;
|
}
|
EXPORT_SYMBOL_GPL(usb_stor_host_template_init);
|
|
/* To Report "Illegal Request: Invalid Field in CDB */
|
unsigned char usb_stor_sense_invalidCDB[18] = {
|
[0] = 0x70, /* current error */
|
[2] = ILLEGAL_REQUEST, /* Illegal Request = 0x05 */
|
[7] = 0x0a, /* additional length */
|
[12] = 0x24 /* Invalid Field in CDB */
|
};
|
EXPORT_SYMBOL_GPL(usb_stor_sense_invalidCDB);
|
