728 lines
21 KiB
C
728 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for USB Mass Storage compliant devices
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* SCSI layer glue code
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*
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* Current development and maintenance by:
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* (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
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*
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* Developed with the assistance of:
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* (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
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* (c) 2000 Stephen J. Gowdy (SGowdy@lbl.gov)
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*
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* Initial work by:
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* (c) 1999 Michael Gee (michael@linuxspecific.com)
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*
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* This driver is based on the 'USB Mass Storage Class' document. This
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* describes in detail the protocol used to communicate with such
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* devices. Clearly, the designers had SCSI and ATAPI commands in
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* mind when they created this document. The commands are all very
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* similar to commands in the SCSI-II and ATAPI specifications.
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*
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* It is important to note that in a number of cases this class
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* exhibits class-specific exemptions from the USB specification.
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* Notably the usage of NAK, STALL and ACK differs from the norm, in
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* that they are used to communicate wait, failed and OK on commands.
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*
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* Also, for certain devices, the interrupt endpoint is used to convey
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* status of a command.
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_devinfo.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include "usb.h"
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#include "scsiglue.h"
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#include "debug.h"
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#include "transport.h"
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#include "protocol.h"
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/*
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* Vendor IDs for companies that seem to include the READ CAPACITY bug
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* in all their devices
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*/
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#define VENDOR_ID_NOKIA 0x0421
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#define VENDOR_ID_NIKON 0x04b0
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#define VENDOR_ID_PENTAX 0x0a17
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#define VENDOR_ID_MOTOROLA 0x22b8
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/***********************************************************************
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* Host functions
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***********************************************************************/
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static const char* host_info(struct Scsi_Host *host)
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{
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struct us_data *us = host_to_us(host);
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return us->scsi_name;
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}
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static int slave_alloc (struct scsi_device *sdev)
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{
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struct us_data *us = host_to_us(sdev->host);
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/*
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* Set the INQUIRY transfer length to 36. We don't use any of
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* the extra data and many devices choke if asked for more or
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* less than 36 bytes.
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*/
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sdev->inquiry_len = 36;
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/*
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* Some host controllers may have alignment requirements.
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* We'll play it safe by requiring 512-byte alignment always.
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*/
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blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
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/* Tell the SCSI layer if we know there is more than one LUN */
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if (us->protocol == USB_PR_BULK && us->max_lun > 0)
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sdev->sdev_bflags |= BLIST_FORCELUN;
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return 0;
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}
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static int slave_configure(struct scsi_device *sdev)
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{
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struct us_data *us = host_to_us(sdev->host);
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/*
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* Many devices have trouble transferring more than 32KB at a time,
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* while others have trouble with more than 64K. At this time we
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* are limiting both to 32K (64 sectores).
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*/
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if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) {
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unsigned int max_sectors = 64;
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if (us->fflags & US_FL_MAX_SECTORS_MIN)
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max_sectors = PAGE_SIZE >> 9;
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if (queue_max_hw_sectors(sdev->request_queue) > max_sectors)
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blk_queue_max_hw_sectors(sdev->request_queue,
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max_sectors);
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} else if (sdev->type == TYPE_TAPE) {
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/*
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* Tapes need much higher max_sector limits, so just
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* raise it to the maximum possible (4 GB / 512) and
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* let the queue segment size sort out the real limit.
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*/
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blk_queue_max_hw_sectors(sdev->request_queue, 0x7FFFFF);
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} else if (us->pusb_dev->speed >= USB_SPEED_SUPER) {
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/*
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* USB3 devices will be limited to 2048 sectors. This gives us
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* better throughput on most devices.
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*/
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blk_queue_max_hw_sectors(sdev->request_queue, 2048);
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}
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/*
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* Some USB host controllers can't do DMA; they have to use PIO.
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* They indicate this by setting their dma_mask to NULL. For
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* such controllers we need to make sure the block layer sets
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* up bounce buffers in addressable memory.
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*/
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if (!us->pusb_dev->bus->controller->dma_mask)
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blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH);
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/*
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* We can't put these settings in slave_alloc() because that gets
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* called before the device type is known. Consequently these
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* settings can't be overridden via the scsi devinfo mechanism.
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*/
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if (sdev->type == TYPE_DISK) {
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/*
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* Some vendors seem to put the READ CAPACITY bug into
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* all their devices -- primarily makers of cell phones
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* and digital cameras. Since these devices always use
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* flash media and can be expected to have an even number
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* of sectors, we will always enable the CAPACITY_HEURISTICS
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* flag unless told otherwise.
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*/
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switch (le16_to_cpu(us->pusb_dev->descriptor.idVendor)) {
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case VENDOR_ID_NOKIA:
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case VENDOR_ID_NIKON:
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case VENDOR_ID_PENTAX:
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case VENDOR_ID_MOTOROLA:
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if (!(us->fflags & (US_FL_FIX_CAPACITY |
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US_FL_CAPACITY_OK)))
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us->fflags |= US_FL_CAPACITY_HEURISTICS;
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break;
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}
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/*
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* Disk-type devices use MODE SENSE(6) if the protocol
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* (SubClass) is Transparent SCSI, otherwise they use
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* MODE SENSE(10).
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*/
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if (us->subclass != USB_SC_SCSI && us->subclass != USB_SC_CYP_ATACB)
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sdev->use_10_for_ms = 1;
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/*
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*Many disks only accept MODE SENSE transfer lengths of
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* 192 bytes (that's what Windows uses).
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*/
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sdev->use_192_bytes_for_3f = 1;
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/*
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* Some devices don't like MODE SENSE with page=0x3f,
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* which is the command used for checking if a device
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* is write-protected. Now that we tell the sd driver
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* to do a 192-byte transfer with this command the
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* majority of devices work fine, but a few still can't
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* handle it. The sd driver will simply assume those
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* devices are write-enabled.
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*/
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if (us->fflags & US_FL_NO_WP_DETECT)
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sdev->skip_ms_page_3f = 1;
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/*
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* A number of devices have problems with MODE SENSE for
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* page x08, so we will skip it.
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*/
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sdev->skip_ms_page_8 = 1;
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/* Some devices don't handle VPD pages correctly */
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sdev->skip_vpd_pages = 1;
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/* Do not attempt to use REPORT SUPPORTED OPERATION CODES */
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sdev->no_report_opcodes = 1;
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/* Do not attempt to use WRITE SAME */
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sdev->no_write_same = 1;
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/*
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* Some disks return the total number of blocks in response
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* to READ CAPACITY rather than the highest block number.
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* If this device makes that mistake, tell the sd driver.
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*/
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if (us->fflags & US_FL_FIX_CAPACITY)
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sdev->fix_capacity = 1;
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/*
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* A few disks have two indistinguishable version, one of
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* which reports the correct capacity and the other does not.
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* The sd driver has to guess which is the case.
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*/
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if (us->fflags & US_FL_CAPACITY_HEURISTICS)
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sdev->guess_capacity = 1;
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/* Some devices cannot handle READ_CAPACITY_16 */
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if (us->fflags & US_FL_NO_READ_CAPACITY_16)
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sdev->no_read_capacity_16 = 1;
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/*
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* Many devices do not respond properly to READ_CAPACITY_16.
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* Tell the SCSI layer to try READ_CAPACITY_10 first.
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* However some USB 3.0 drive enclosures return capacity
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* modulo 2TB. Those must use READ_CAPACITY_16
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*/
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if (!(us->fflags & US_FL_NEEDS_CAP16))
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sdev->try_rc_10_first = 1;
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/*
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* assume SPC3 or latter devices support sense size > 18
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* unless US_FL_BAD_SENSE quirk is specified.
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*/
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if (sdev->scsi_level > SCSI_SPC_2 &&
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!(us->fflags & US_FL_BAD_SENSE))
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us->fflags |= US_FL_SANE_SENSE;
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/*
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* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable
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* Hardware Error) when any low-level error occurs,
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* recoverable or not. Setting this flag tells the SCSI
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* midlayer to retry such commands, which frequently will
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* succeed and fix the error. The worst this can lead to
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* is an occasional series of retries that will all fail.
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*/
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sdev->retry_hwerror = 1;
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/*
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* USB disks should allow restart. Some drives spin down
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* automatically, requiring a START-STOP UNIT command.
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*/
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sdev->allow_restart = 1;
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/*
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* Some USB cardreaders have trouble reading an sdcard's last
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* sector in a larger then 1 sector read, since the performance
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* impact is negligible we set this flag for all USB disks
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*/
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sdev->last_sector_bug = 1;
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/*
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* Enable last-sector hacks for single-target devices using
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* the Bulk-only transport, unless we already know the
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* capacity will be decremented or is correct.
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*/
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if (!(us->fflags & (US_FL_FIX_CAPACITY | US_FL_CAPACITY_OK |
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US_FL_SCM_MULT_TARG)) &&
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us->protocol == USB_PR_BULK)
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us->use_last_sector_hacks = 1;
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/* Check if write cache default on flag is set or not */
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if (us->fflags & US_FL_WRITE_CACHE)
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sdev->wce_default_on = 1;
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/* A few buggy USB-ATA bridges don't understand FUA */
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if (us->fflags & US_FL_BROKEN_FUA)
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sdev->broken_fua = 1;
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/* Some even totally fail to indicate a cache */
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if (us->fflags & US_FL_ALWAYS_SYNC) {
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/* don't read caching information */
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sdev->skip_ms_page_8 = 1;
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sdev->skip_ms_page_3f = 1;
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/* assume sync is needed */
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sdev->wce_default_on = 1;
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}
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} else {
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/*
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* Non-disk-type devices don't need to blacklist any pages
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* or to force 192-byte transfer lengths for MODE SENSE.
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* But they do need to use MODE SENSE(10).
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*/
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sdev->use_10_for_ms = 1;
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/* Some (fake) usb cdrom devices don't like READ_DISC_INFO */
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if (us->fflags & US_FL_NO_READ_DISC_INFO)
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sdev->no_read_disc_info = 1;
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}
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/*
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* The CB and CBI transports have no way to pass LUN values
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* other than the bits in the second byte of a CDB. But those
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* bits don't get set to the LUN value if the device reports
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* scsi_level == 0 (UNKNOWN). Hence such devices must necessarily
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* be single-LUN.
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*/
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if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) &&
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sdev->scsi_level == SCSI_UNKNOWN)
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us->max_lun = 0;
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/*
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* Some devices choke when they receive a PREVENT-ALLOW MEDIUM
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* REMOVAL command, so suppress those commands.
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*/
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if (us->fflags & US_FL_NOT_LOCKABLE)
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sdev->lockable = 0;
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/*
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* this is to satisfy the compiler, tho I don't think the
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* return code is ever checked anywhere.
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*/
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return 0;
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}
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static int target_alloc(struct scsi_target *starget)
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{
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struct us_data *us = host_to_us(dev_to_shost(starget->dev.parent));
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/*
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* Some USB drives don't support REPORT LUNS, even though they
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* report a SCSI revision level above 2. Tell the SCSI layer
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* not to issue that command; it will perform a normal sequential
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* scan instead.
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*/
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starget->no_report_luns = 1;
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/*
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* The UFI spec treats the Peripheral Qualifier bits in an
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* INQUIRY result as reserved and requires devices to set them
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* to 0. However the SCSI spec requires these bits to be set
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* to 3 to indicate when a LUN is not present.
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*
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* Let the scanning code know if this target merely sets
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* Peripheral Device Type to 0x1f to indicate no LUN.
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*/
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if (us->subclass == USB_SC_UFI)
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starget->pdt_1f_for_no_lun = 1;
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return 0;
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}
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/* queue a command */
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/* This is always called with scsi_lock(host) held */
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static int queuecommand_lck(struct scsi_cmnd *srb,
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void (*done)(struct scsi_cmnd *))
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{
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struct us_data *us = host_to_us(srb->device->host);
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#ifdef CONFIG_SEC_FACTORY
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if (srb && srb->device &&
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srb->device->removable && srb->cmnd &&
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srb->cmnd[0] == TEST_UNIT_READY) {
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pr_info("usb-storage: %s TEST_UNIT_READY +\n",
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__func__);
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}
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#endif
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/* check for state-transition errors */
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if (us->srb != NULL) {
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printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n",
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__func__, us->srb);
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return SCSI_MLQUEUE_HOST_BUSY;
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}
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/* fail the command if we are disconnecting */
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if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
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usb_stor_dbg(us, "Fail command during disconnect\n");
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_err("usb-storage: %s, Fail command during disconnect\n",
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__func__);
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#endif
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srb->result = DID_NO_CONNECT << 16;
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done(srb);
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return 0;
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}
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#ifdef CONFIG_SEC_FACTORY
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if (test_bit(US_FLIDX_ABORTING, &us->dflags)) {
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usb_stor_dbg(us, "Fail command during abort\n");
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_err("usb-storage: %s, Fail command during abort\n",
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__func__);
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#endif
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srb->result = DID_NO_CONNECT << 16;
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done(srb);
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return 0;
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}
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#endif
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if ((us->fflags & US_FL_NO_ATA_1X) &&
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(srb->cmnd[0] == ATA_12 || srb->cmnd[0] == ATA_16)) {
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memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB,
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sizeof(usb_stor_sense_invalidCDB));
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srb->result = SAM_STAT_CHECK_CONDITION;
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done(srb);
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#ifdef CONFIG_SEC_FACTORY
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pr_info("usb-storage: %s, SAM_STAT_CHECK_CONDITION\n",
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__func__);
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#endif
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return 0;
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}
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/* enqueue the command and wake up the control thread */
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srb->scsi_done = done;
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us->srb = srb;
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complete(&us->cmnd_ready);
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#ifdef CONFIG_SEC_FACTORY
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if (srb && srb->device &&
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srb->device->removable && srb->cmnd &&
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srb->cmnd[0] == TEST_UNIT_READY) {
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pr_info("usb-storage: %s TEST_UNIT_READY -\n",
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__func__);
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}
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#endif
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return 0;
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}
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static DEF_SCSI_QCMD(queuecommand)
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/***********************************************************************
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* Error handling functions
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***********************************************************************/
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/* Command timeout and abort */
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static int command_abort(struct scsi_cmnd *srb)
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{
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struct us_data *us = host_to_us(srb->device->host);
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usb_stor_dbg(us, "%s called\n", __func__);
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_info("usb-storage: %s scsi_lock +\n", __func__);
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#endif
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/*
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* us->srb together with the TIMED_OUT, RESETTING, and ABORTING
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* bits are protected by the host lock.
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*/
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scsi_lock(us_to_host(us));
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/* Is this command still active? */
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if (us->srb != srb) {
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scsi_unlock(us_to_host(us));
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usb_stor_dbg(us, "-- nothing to abort\n");
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_info("usb-storage: %s -- nothing to abort -\n",
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__func__);
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#endif
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return FAILED;
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}
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/*
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* Set the TIMED_OUT bit. Also set the ABORTING bit, but only if
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* a device reset isn't already in progress (to avoid interfering
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* with the reset). Note that we must retain the host lock while
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* calling usb_stor_stop_transport(); otherwise it might interfere
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* with an auto-reset that begins as soon as we release the lock.
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*/
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set_bit(US_FLIDX_TIMED_OUT, &us->dflags);
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if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) {
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set_bit(US_FLIDX_ABORTING, &us->dflags);
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usb_stor_stop_transport(us);
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}
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scsi_unlock(us_to_host(us));
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_info("usb-storage: %s scsi_unlock\n", __func__);
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#endif
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/* Wait for the aborted command to finish */
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wait_for_completion(&us->notify);
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#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
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pr_info("usb-storage: %s -\n", __func__);
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#endif
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return SUCCESS;
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}
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/*
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* This invokes the transport reset mechanism to reset the state of the
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* device
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*/
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static int device_reset(struct scsi_cmnd *srb)
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|
{
|
|
struct us_data *us = host_to_us(srb->device->host);
|
|
int result;
|
|
|
|
usb_stor_dbg(us, "%s called\n", __func__);
|
|
|
|
/* 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);
|
|
|
|
#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
|
|
pr_info("usb-storage: %s scsi_lock\n", __func__);
|
|
#endif
|
|
scsi_lock(host);
|
|
scsi_report_bus_reset(host, 0);
|
|
scsi_unlock(host);
|
|
#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
|
|
pr_info("usb-storage: %s scsi_unlock\n", __func__);
|
|
#endif
|
|
}
|
|
|
|
/***********************************************************************
|
|
* /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,
|
|
|
|
/*
|
|
* merge commands... this seems to help performance, but
|
|
* periodically someone should test to see which setting is more
|
|
* optimal.
|
|
*/
|
|
.use_clustering = 1,
|
|
|
|
/* 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);
|