* or before the URB_ACTIVE bit was set. If so, it's essential to cancel
* the URB if it hasn't been cancelled already (i.e., if the URB_ACTIVE bit
* is still set). Either way, the function must then wait for the URB to
- * finish. Note that because the URB_ASYNC_UNLINK flag is set, the URB can
- * still be in progress even after a call to usb_unlink_urb() returns.
+ * finish. Note that the URB can still be in progress even after a call to
+ * usb_unlink_urb() returns.
*
* The idea is that (1) once the ABORTING or DISCONNECTING bit is set,
* either the stop_transport() function or the submitting function
* hasn't been mapped for DMA. Yes, this is clunky, but it's
* easier than always having the caller tell us whether the
* transfer buffer has already been mapped. */
- us->current_urb->transfer_flags =
- URB_ASYNC_UNLINK | URB_NO_SETUP_DMA_MAP;
+ us->current_urb->transfer_flags = URB_NO_SETUP_DMA_MAP;
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;
NULL, 0, 3*HZ);
/* reset the endpoint toggle */
- usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe),
- usb_pipeout(pipe), 0);
+ if (result >= 0)
+ usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe),
+ usb_pipeout(pipe), 0);
US_DEBUGP("%s: result = %d\n", __FUNCTION__, result);
return result;
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
US_DEBUGP("-- command was aborted\n");
- goto Handle_Abort;
+ 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) {
US_DEBUGP("-- transport indicates error, resetting\n");
- us->transport_reset(us);
srb->result = DID_ERROR << 16;
- return;
+ goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
unsigned char old_sc_data_direction;
unsigned char old_cmd_len;
unsigned char old_cmnd[MAX_COMMAND_SIZE];
- unsigned long old_serial_number;
int old_resid;
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
/* use the new buffer we have */
old_request_buffer = srb->request_buffer;
- srb->request_buffer = srb->sense_buffer;
+ srb->request_buffer = us->sensebuf;
/* set the buffer length for transfer */
old_request_bufflen = srb->request_bufflen;
- srb->request_bufflen = 18;
+ srb->request_bufflen = US_SENSE_SIZE;
/* set up for no scatter-gather use */
old_sg = srb->use_sg;
srb->use_sg = 0;
- /* change the serial number -- toggle the high bit*/
- old_serial_number = srb->serial_number;
- srb->serial_number ^= 0x80000000;
-
/* issue the auto-sense command */
old_resid = srb->resid;
srb->resid = 0;
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
+ memcpy(srb->sense_buffer, us->sensebuf, US_SENSE_SIZE);
srb->resid = old_resid;
srb->request_buffer = old_request_buffer;
srb->request_bufflen = old_request_bufflen;
srb->use_sg = old_sg;
- srb->serial_number = old_serial_number;
srb->sc_data_direction = old_sc_data_direction;
srb->cmd_len = old_cmd_len;
memcpy(srb->cmnd, old_cmnd, MAX_COMMAND_SIZE);
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
US_DEBUGP("-- auto-sense aborted\n");
- goto Handle_Abort;
+ srb->result = DID_ABORT << 16;
+ goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
- if (!(us->flags & US_FL_SCM_MULT_TARG))
- us->transport_reset(us);
srb->result = DID_ERROR << 16;
+ if (!(us->flags & US_FL_SCM_MULT_TARG))
+ goto Handle_Errors;
return;
}
return;
- /* abort processing: the bulk-only transport requires a reset
- * following an abort */
- Handle_Abort:
- srb->result = DID_ABORT << 16;
- if (us->protocol == US_PR_BULK)
+ /* Error and abort processing: try to resynchronize with the device
+ * by issuing a port reset. If that fails, try a class-specific
+ * device reset. */
+ Handle_Errors:
+
+ /* Let the SCSI layer know we are doing a reset, set the
+ * RESETTING bit, and clear the ABORTING bit so that the reset
+ * may proceed. */
+ scsi_lock(us_to_host(us));
+ usb_stor_report_bus_reset(us);
+ set_bit(US_FLIDX_RESETTING, &us->flags);
+ clear_bit(US_FLIDX_ABORTING, &us->flags);
+ scsi_unlock(us_to_host(us));
+
+ result = usb_stor_port_reset(us);
+ 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->flags);
}
/* Stop the current URB transfer */
int result;
/* 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 |
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 = srb->serial_number;
+ bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->flags & US_FL_SCM_MULT_TARG)
bcb->Lun |= srb->device->id << 4;
US_DEBUGP("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 != srb->serial_number || bcs->Status > US_BULK_STAT_PHASE) {
+ if (bcs->Tag != us->tag || bcs->Status > US_BULK_STAT_PHASE) {
US_DEBUGP("Bulk logical error\n");
return USB_STOR_TRANSPORT_ERROR;
}
* It's handy that every transport mechanism uses the control endpoint for
* resets.
*
- * Basically, we send a reset with a 20-second timeout, so we don't get
+ * Basically, we send a reset with a 5-second timeout, so we don't get
* jammed attempting to do the reset.
*/
static int usb_stor_reset_common(struct us_data *us,
{
int result;
int result2;
- int rc = FAILED;
- /* Let the SCSI layer know we are doing a reset, set the
- * RESETTING bit, and clear the ABORTING bit so that the reset
- * may proceed.
- */
- scsi_lock(us_to_host(us));
- usb_stor_report_device_reset(us);
- set_bit(US_FLIDX_RESETTING, &us->flags);
- clear_bit(US_FLIDX_ABORTING, &us->flags);
- scsi_unlock(us_to_host(us));
+ if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+ US_DEBUGP("No reset during disconnect\n");
+ return -EIO;
+ }
- /* A 20-second timeout may seem rather long, but a LaCie
- * StudioDrive USB2 device takes 16+ seconds to get going
- * following a powerup or USB attach event.
- */
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
request, requesttype, value, index, data, size,
- 20*HZ);
+ 5*HZ);
if (result < 0) {
US_DEBUGP("Soft reset failed: %d\n", result);
- goto Done;
+ return result;
}
/* Give the device some time to recover from the reset,
HZ*6);
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
US_DEBUGP("Reset interrupted by disconnect\n");
- goto Done;
+ return -EIO;
}
US_DEBUGP("Soft reset: clearing bulk-in endpoint halt\n");
US_DEBUGP("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 control message */
- if (result < 0 || result2 < 0) {
+ /* return a result code based on the result of the clear-halts */
+ if (result >= 0)
+ result = result2;
+ if (result < 0)
US_DEBUGP("Soft reset failed\n");
- goto Done;
- }
- US_DEBUGP("Soft reset done\n");
- rc = SUCCESS;
-
- Done:
- clear_bit(US_FLIDX_RESETTING, &us->flags);
- return rc;
+ else
+ US_DEBUGP("Soft reset done\n");
+ return result;
}
/* This issues a CB[I] Reset to the device in question
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, us->ifnum, NULL, 0);
}
+
+/* Issue a USB port reset to the device. But don't do anything if
+ * there's more than one interface in the device, so that other users
+ * are not affected. */
+int usb_stor_port_reset(struct us_data *us)
+{
+ int result, rc;
+
+ if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+ result = -EIO;
+ US_DEBUGP("No reset during disconnect\n");
+ } else if (us->pusb_dev->actconfig->desc.bNumInterfaces != 1) {
+ result = -EBUSY;
+ US_DEBUGP("Refusing to reset a multi-interface device\n");
+ } else {
+ result = rc =
+ usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf);
+ if (result < 0) {
+ US_DEBUGP("unable to lock device for reset: %d\n",
+ result);
+ } else {
+ result = usb_reset_device(us->pusb_dev);
+ if (rc)
+ usb_unlock_device(us->pusb_dev);
+ US_DEBUGP("usb_reset_device returns %d\n", result);
+ }
+ }
+ return result;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff