- 根目录:
- drivers
- staging
- keucr
- transport.c
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
#include "usb.h"
#include "scsiglue.h"
#include "transport.h"
/***********************************************************************
* Data transfer routines
***********************************************************************/
/*
* usb_stor_blocking_completion()
*/
static void usb_stor_blocking_completion(struct urb *urb)
{
struct completion *urb_done_ptr = urb->context;
/* pr_info("transport --- usb_stor_blocking_completion\n"); */
complete(urb_done_ptr);
}
/*
* usb_stor_msg_common()
*/
static int usb_stor_msg_common(struct us_data *us, int timeout)
{
struct completion urb_done;
long timeleft;
int status;
/* pr_info("transport --- usb_stor_msg_common\n"); */
if (test_bit(US_FLIDX_ABORTING, &us->dflags))
return -EIO;
init_completion(&urb_done);
us->current_urb->context = &urb_done;
us->current_urb->actual_length = 0;
us->current_urb->error_count = 0;
us->current_urb->status = 0;
us->current_urb->transfer_flags = 0;
if (us->current_urb->transfer_buffer == us->iobuf)
us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
us->current_urb->transfer_dma = us->iobuf_dma;
us->current_urb->setup_dma = us->cr_dma;
status = usb_submit_urb(us->current_urb, GFP_NOIO);
if (status)
return status;
set_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
if (test_bit(US_FLIDX_ABORTING, &us->dflags)) {
if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) {
/* pr_info("-- cancelling URB\n"); */
usb_unlink_urb(us->current_urb);
}
}
timeleft = wait_for_completion_interruptible_timeout(&urb_done,
timeout ? : MAX_SCHEDULE_TIMEOUT);
clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
if (timeleft <= 0) {
/* pr_info("%s -- cancelling URB\n",
timeleft == 0 ? "Timeout" : "Signal"); */
usb_kill_urb(us->current_urb);
}
return us->current_urb->status;
}
/*
* usb_stor_control_msg()
*/
int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
u8 request, u8 requesttype, u16 value, u16 index,
void *data, u16 size, int timeout)
{
int status;
/* pr_info("transport --- usb_stor_control_msg\n"); */
/* fill in the devrequest structure */
us->cr->bRequestType = requesttype;
us->cr->bRequest = request;
us->cr->wValue = cpu_to_le16(value);
us->cr->wIndex = cpu_to_le16(index);
us->cr->wLength = cpu_to_le16(size);
/* fill and submit the URB */
usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe,
(unsigned char *) us->cr, data, size,
usb_stor_blocking_completion, NULL);
status = usb_stor_msg_common(us, timeout);
/* return the actual length of the data transferred if no error */
if (status == 0)
status = us->current_urb->actual_length;
return status;
}
/*
* usb_stor_clear_halt()
*/
int usb_stor_clear_halt(struct us_data *us, unsigned int pipe)
{
int result;
int endp = usb_pipeendpoint(pipe);
/* pr_info("transport --- usb_stor_clear_halt\n"); */
if (usb_pipein(pipe))
endp |= USB_DIR_IN;
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
USB_ENDPOINT_HALT, endp,
NULL, 0, 3*HZ);
/* reset the endpoint toggle */
if (result >= 0)
/* usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe),
usb_pipeout(pipe), 0); */
usb_reset_endpoint(us->pusb_dev, endp);
return result;
}
/*
* interpret_urb_result()
*/
static int interpret_urb_result(struct us_data *us, unsigned int pipe,
unsigned int length, int result, unsigned int partial)
{
/* pr_info("transport --- interpret_urb_result\n"); */
switch (result) {
/* no error code; did we send all the data? */
case 0:
if (partial != length) {
/* pr_info("-- short transfer\n"); */
return USB_STOR_XFER_SHORT;
}
/* pr_info("-- transfer complete\n"); */
return USB_STOR_XFER_GOOD;
case -EPIPE:
if (usb_pipecontrol(pipe)) {
/* pr_info("-- stall on control pipe\n"); */
return USB_STOR_XFER_STALLED;
}
/* pr_info("clearing endpoint halt for pipe 0x%x\n", pipe); */
if (usb_stor_clear_halt(us, pipe) < 0)
return USB_STOR_XFER_ERROR;
return USB_STOR_XFER_STALLED;
case -EOVERFLOW:
/* pr_info("-- babble\n"); */
return USB_STOR_XFER_LONG;
case -ECONNRESET:
/* pr_info("-- transfer cancelled\n"); */
return USB_STOR_XFER_ERROR;
case -EREMOTEIO:
/* pr_info("-- short read transfer\n"); */
return USB_STOR_XFER_SHORT;
case -EIO:
/* pr_info("-- abort or disconnect in progress\n"); */
return USB_STOR_XFER_ERROR;
default:
/* pr_info("-- unknown error\n"); */
return USB_STOR_XFER_ERROR;
}
}
/*
* usb_stor_bulk_transfer_buf()
*/
int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
void *buf, unsigned int length, unsigned int *act_len)
{
int result;
/* pr_info("transport --- usb_stor_bulk_transfer_buf\n"); */
/* fill and submit the URB */
usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf,
length, usb_stor_blocking_completion, NULL);
result = usb_stor_msg_common(us, 0);
/* store the actual length of the data transferred */
if (act_len)
*act_len = us->current_urb->actual_length;
return interpret_urb_result(us, pipe, length, result,
us->current_urb->actual_length);
}
/*
* usb_stor_bulk_transfer_sglist()
*/
static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
struct scatterlist *sg, int num_sg, unsigned int length,
unsigned int *act_len)
{
int result;
/* pr_info("transport --- usb_stor_bulk_transfer_sglist\n"); */
if (test_bit(US_FLIDX_ABORTING, &us->dflags))
return USB_STOR_XFER_ERROR;
/* initialize the scatter-gather request block */
result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0,
sg, num_sg, length, GFP_NOIO);
if (result) {
/* pr_info("usb_sg_init returned %d\n", result); */
return USB_STOR_XFER_ERROR;
}
/* since the block has been initialized successfully,
it's now okay to cancel it */
set_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
/* did an abort/disconnect occur during the submission? */
if (test_bit(US_FLIDX_ABORTING, &us->dflags)) {
/* cancel the request, if it hasn't been cancelled already */
if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) {
/* pr_info("-- cancelling sg request\n"); */
usb_sg_cancel(&us->current_sg);
}
}
/* wait for the completion of the transfer */
usb_sg_wait(&us->current_sg);
clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
result = us->current_sg.status;
if (act_len)
*act_len = us->current_sg.bytes;
return interpret_urb_result(us, pipe, length,
result, us->current_sg.bytes);
}
/*
* usb_stor_bulk_srb()
*/
int usb_stor_bulk_srb(struct us_data *us, unsigned int pipe,
struct scsi_cmnd *srb)
{
unsigned int partial;
int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb),
scsi_sg_count(srb), scsi_bufflen(srb),
&partial);
scsi_set_resid(srb, scsi_bufflen(srb) - partial);
return result;
}
/*
* usb_stor_bulk_transfer_sg()
*/
int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
void *buf, unsigned int length_left, int use_sg, int *residual)
{
int result;
unsigned int partial;
/* pr_info("transport --- usb_stor_bulk_transfer_sg\n"); */
/* are we scatter-gathering? */
if (use_sg) {
/* use the usb core scatter-gather primitives */
result = usb_stor_bulk_transfer_sglist(us, pipe,
(struct scatterlist *) buf, use_sg,
length_left, &partial);
length_left -= partial;
} else {
/* no scatter-gather, just make the request */
result = usb_stor_bulk_transfer_buf(us, pipe, buf,
length_left, &partial);
length_left -= partial;
}
/* store the residual and return the error code */
if (residual)
*residual = length_left;
return result;
}
/***********************************************************************
* Transport routines
***********************************************************************/
/*
* usb_stor_invoke_transport()
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* pr_info("transport --- usb_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us); /* usb_stor_Bulk_transport; */
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense */
need_auto_sense = 0;
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
/* pr_info("-- CB transport device requiring auto-sense\n"); */
need_auto_sense = 1;
}
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
need_auto_sense = 1;
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
pr_info("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
/* we must do the protocol translation here */
if (us->subclass == USB_SC_RBC ||
us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB) {
srb->cmd_len = 6;
} else {
srb->cmd_len = 12;
}
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- auto-sense aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
/* pr_info("-- auto-sense failure\n"); */
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
if (result == USB_STOR_TRANSPORT_GOOD &&
(srb->sense_buffer[2] & 0xaf) == 0 &&
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
/*
* ENE_stor_invoke_transport()
*/
void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int result = 0;
/* pr_info("transport --- ENE_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
if (!(us->MS_Status.Ready || us->SM_Status.Ready))
result = ENE_InitMedia(us);
if (us->Power_IsResum == true) {
result = ENE_InitMedia(us);
us->Power_IsResum = false;
}
if (us->MS_Status.Ready)
result = MS_SCSIIrp(us, srb);
if (us->SM_Status.Ready)
result = SM_SCSIIrp(us, srb);
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
/* need_auto_sense = 1; */
BuildSenseBuffer(srb, us->SrbStatus);
srb->result = SAM_STAT_CHECK_CONDITION;
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
/*
* BuildSenseBuffer()
*/
void BuildSenseBuffer(struct scsi_cmnd *srb, int SrbStatus)
{
BYTE *buf = srb->sense_buffer;
BYTE asc;
pr_info("transport --- BuildSenseBuffer\n");
switch (SrbStatus) {
case SS_NOT_READY:
asc = 0x3a;
break; /* sense key = 0x02 */
case SS_MEDIUM_ERR:
asc = 0x0c;
break; /* sense key = 0x03 */
case SS_ILLEGAL_REQUEST:
asc = 0x20;
break; /* sense key = 0x05 */
default:
asc = 0x00;
break; /* ?? */
}
memset(buf, 0, 18);
buf[0x00] = 0xf0;
buf[0x02] = SrbStatus;
buf[0x07] = 0x0b;
buf[0x0c] = asc;
}
/*
* usb_stor_stop_transport()
*/
void usb_stor_stop_transport(struct us_data *us)
{
/* pr_info("transport --- usb_stor_stop_transport\n"); */
if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) {
/* pr_info("-- cancelling URB\n"); */
usb_unlink_urb(us->current_urb);
}
if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) {
/* pr_info("-- cancelling sg request\n"); */
usb_sg_cancel(&us->current_sg);
}
}
/*
* usb_stor_Bulk_max_lun()
*/
int usb_stor_Bulk_max_lun(struct us_data *us)
{
int result;
/* pr_info("transport --- usb_stor_Bulk_max_lun\n"); */
/* issue the command */
us->iobuf[0] = 0;
result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
US_BULK_GET_MAX_LUN,
USB_DIR_IN | USB_TYPE_CLASS |
USB_RECIP_INTERFACE,
0, us->ifnum, us->iobuf, 1, HZ);
/* pr_info("GetMaxLUN command result is %d, data is %d\n",
result, us->iobuf[0]); */
/* if we have a successful request, return the result */
if (result > 0)
return us->iobuf[0];
return 0;
}
/*
* usb_stor_Bulk_transport()
*/
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
unsigned int transfer_length = scsi_bufflen(srb);
unsigned int residue;
int result;
int fake_sense = 0;
unsigned int cswlen;
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
/* pr_info("transport --- usb_stor_Bulk_transport\n"); */
/* Take care of BULK32 devices; set extra byte to 0 */
if (unlikely(us->fflags & US_FL_BULK32)) {
cbwlen = 32;
us->iobuf[31] = 0;
}
/* set up the command wrapper */
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->DataTransferLength = cpu_to_le32(transfer_length);
bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)
bcb->Lun |= srb->device->id << 4;
bcb->Length = srb->cmd_len;
/* copy the command payload */
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, srb->cmnd, bcb->Length);
/* send command */
/* send it to out endpoint */
/* pr_info("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
le32_to_cpu(bcb->Signature), bcb->Tag,
le32_to_cpu(bcb->DataTransferLength), bcb->Flags,
(bcb->Lun >> 4), (bcb->Lun & 0x0F),
bcb->Length); */
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
bcb, cbwlen, NULL);
/* pr_info("Bulk command transfer result=%d\n", result); */
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125);
/* R/W data */
if (transfer_length) {
unsigned int pipe;
if (srb->sc_data_direction == DMA_FROM_DEVICE)
pipe = us->recv_bulk_pipe;
else
pipe = us->send_bulk_pipe;
result = usb_stor_bulk_srb(us, pipe, srb);
/* pr_info("Bulk data transfer result 0x%x\n", result); */
if (result == USB_STOR_XFER_ERROR)
return USB_STOR_TRANSPORT_ERROR;
if (result == USB_STOR_XFER_LONG)
fake_sense = 1;
}
/* get CSW for device status */
/* pr_info("Attempting to get CSW...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &cswlen);
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
/* pr_info("Received 0-length CSW; retrying...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &cswlen);
}
/* did the attempt to read the CSW fail? */
if (result == USB_STOR_XFER_STALLED) {
/* get the status again */
/* pr_info("Attempting to get CSW (2nd try)...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, NULL);
}
/* if we still have a failure at this point, we're in trouble */
/* pr_info("Bulk status result = %d\n", result); */
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
/* check bulk status */
residue = le32_to_cpu(bcs->Residue);
/* pr_info("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
le32_to_cpu(bcs->Signature),
bcs->Tag, residue, bcs->Status); */
if (!(bcs->Tag == us->tag ||
(us->fflags & US_FL_BULK_IGNORE_TAG)) ||
bcs->Status > US_BULK_STAT_PHASE) {
/* pr_info("Bulk logical error\n"); */
return USB_STOR_TRANSPORT_ERROR;
}
if (!us->bcs_signature) {
us->bcs_signature = bcs->Signature;
/* if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN)) */
/* pr_info("Learnt BCS signature 0x%08X\n",
le32_to_cpu(us->bcs_signature)); */
} else if (bcs->Signature != us->bcs_signature) {
/* pr_info("Signature mismatch: got %08X, expecting %08X\n",
le32_to_cpu(bcs->Signature),
le32_to_cpu(us->bcs_signature)); */
return USB_STOR_TRANSPORT_ERROR;
}
/* try to compute the actual residue, based on how much data
* was really transferred and what the device tells us */
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
/* Heuristically detect devices that generate bogus residues
* by seeing what happens with INQUIRY and READ CAPACITY
* commands.
*/
if (bcs->Status == US_BULK_STAT_OK &&
scsi_get_resid(srb) == 0 &&
((srb->cmnd[0] == INQUIRY &&
transfer_length == 36) ||
(srb->cmnd[0] == READ_CAPACITY &&
transfer_length == 8))) {
us->fflags |= US_FL_IGNORE_RESIDUE;
} else {
residue = min(residue, transfer_length);
scsi_set_resid(srb, max(scsi_get_resid(srb),
(int) residue));
}
}
/* based on the status code, we report good or bad */
switch (bcs->Status) {
case US_BULK_STAT_OK:
if (fake_sense) {
memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB,
sizeof(usb_stor_sense_invalidCDB));
return USB_STOR_TRANSPORT_NO_SENSE;
}
return USB_STOR_TRANSPORT_GOOD;
case US_BULK_STAT_FAIL:
return USB_STOR_TRANSPORT_FAILED;
case US_BULK_STAT_PHASE:
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_ERROR;
}
/***********************************************************************
* Reset routines
***********************************************************************/
/*
* usb_stor_reset_common()
*/
static int usb_stor_reset_common(struct us_data *us,
u8 request, u8 requesttype,
u16 value, u16 index, void *data, u16 size)
{
int result;
int result2;
/* pr_info("transport --- usb_stor_reset_common\n"); */
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
/* pr_info("No reset during disconnect\n"); */
return -EIO;
}
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
request, requesttype, value, index, data, size, 5*HZ);
if (result < 0) {
/* pr_info("Soft reset failed: %d\n", result); */
return result;
}
wait_event_interruptible_timeout(us->delay_wait,
test_bit(US_FLIDX_DISCONNECTING, &us->dflags), HZ*6);
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
/* pr_info("Reset interrupted by disconnect\n"); */
return -EIO;
}
/* pr_info("Soft reset: clearing bulk-in endpoint halt\n"); */
result = usb_stor_clear_halt(us, us->recv_bulk_pipe);
/* pr_info("Soft reset: clearing bulk-out endpoint halt\n"); */
result2 = usb_stor_clear_halt(us, us->send_bulk_pipe);
/* return a result code based on the result of the clear-halts */
if (result >= 0)
result = result2;
/* if (result < 0) */
/* pr_info("Soft reset failed\n"); */
/* else */
/* pr_info("Soft reset done\n"); */
return result;
}
/*
* usb_stor_Bulk_reset()
*/
int usb_stor_Bulk_reset(struct us_data *us)
{
/* pr_info("transport --- usb_stor_Bulk_reset\n"); */
return usb_stor_reset_common(us, US_BULK_RESET_REQUEST,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, us->ifnum, NULL, 0);
}
/*
* usb_stor_port_reset()
*/
int usb_stor_port_reset(struct us_data *us)
{
int result;
/* pr_info("transport --- usb_stor_port_reset\n"); */
result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf);
if (result < 0)
pr_info("unable to lock device for reset: %d\n", result);
else {
/* Were we disconnected while waiting for the lock? */
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
result = -EIO;
/* pr_info("No reset during disconnect\n"); */
} else {
result = usb_reset_device(us->pusb_dev);
/* pr_info("usb_reset_composite_device returns %d\n",
result); */
}
usb_unlock_device(us->pusb_dev);
}
return result;
}