USB: usb-storage: merge CB and CBI transport routines
This patch (as1173) merges usb-storage's CB and CBI transports into a single routine. So much of their code is common, it's silly to keep them separate. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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3 changed files with 10 additions and 55 deletions
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@ -756,10 +756,10 @@ void usb_stor_stop_transport(struct us_data *us)
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}
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}
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/*
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/*
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* Control/Bulk/Interrupt transport
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* Control/Bulk and Control/Bulk/Interrupt transport
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*/
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*/
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int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
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int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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{
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unsigned int transfer_length = scsi_bufflen(srb);
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unsigned int transfer_length = scsi_bufflen(srb);
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unsigned int pipe = 0;
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unsigned int pipe = 0;
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@ -801,6 +801,13 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
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}
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}
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/* STATUS STAGE */
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/* STATUS STAGE */
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/* NOTE: CB does not have a status stage. Silly, I know. So
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* we have to catch this at a higher level.
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*/
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if (us->protocol != US_PR_CBI)
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return USB_STOR_TRANSPORT_GOOD;
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result = usb_stor_intr_transfer(us, us->iobuf, 2);
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result = usb_stor_intr_transfer(us, us->iobuf, 2);
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US_DEBUGP("Got interrupt data (0x%x, 0x%x)\n",
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US_DEBUGP("Got interrupt data (0x%x, 0x%x)\n",
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us->iobuf[0], us->iobuf[1]);
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us->iobuf[0], us->iobuf[1]);
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@ -854,56 +861,6 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
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return USB_STOR_TRANSPORT_FAILED;
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return USB_STOR_TRANSPORT_FAILED;
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}
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}
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/*
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* Control/Bulk transport
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*/
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int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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unsigned int transfer_length = scsi_bufflen(srb);
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int result;
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/* COMMAND STAGE */
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/* let's send the command via the control pipe */
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result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
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US_CBI_ADSC,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
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us->ifnum, srb->cmnd, srb->cmd_len);
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/* check the return code for the command */
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US_DEBUGP("Call to usb_stor_ctrl_transfer() returned %d\n", result);
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/* if we stalled the command, it means command failed */
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if (result == USB_STOR_XFER_STALLED) {
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return USB_STOR_TRANSPORT_FAILED;
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}
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/* Uh oh... serious problem here */
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if (result != USB_STOR_XFER_GOOD) {
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return USB_STOR_TRANSPORT_ERROR;
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}
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/* DATA STAGE */
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/* transfer the data payload for this command, if one exists*/
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if (transfer_length) {
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unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ?
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us->recv_bulk_pipe : us->send_bulk_pipe;
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result = usb_stor_bulk_srb(us, pipe, srb);
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US_DEBUGP("CB data stage result is 0x%x\n", result);
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/* if we stalled the data transfer it means command failed */
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if (result == USB_STOR_XFER_STALLED)
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return USB_STOR_TRANSPORT_FAILED;
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if (result > USB_STOR_XFER_STALLED)
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return USB_STOR_TRANSPORT_ERROR;
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}
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/* STATUS STAGE */
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/* NOTE: CB does not have a status stage. Silly, I know. So
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* we have to catch this at a higher level.
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*/
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return USB_STOR_TRANSPORT_GOOD;
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}
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/*
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/*
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* Bulk only transport
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* Bulk only transport
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*/
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*/
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@ -113,8 +113,6 @@ struct bulk_cs_wrap {
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#define US_CBI_ADSC 0
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#define US_CBI_ADSC 0
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extern int usb_stor_CBI_transport(struct scsi_cmnd *, struct us_data*);
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extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
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extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
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extern int usb_stor_CB_reset(struct us_data*);
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extern int usb_stor_CB_reset(struct us_data*);
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@ -591,7 +591,7 @@ static int get_transport(struct us_data *us)
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case US_PR_CBI:
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case US_PR_CBI:
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us->transport_name = "Control/Bulk/Interrupt";
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us->transport_name = "Control/Bulk/Interrupt";
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us->transport = usb_stor_CBI_transport;
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us->transport = usb_stor_CB_transport;
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us->transport_reset = usb_stor_CB_reset;
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us->transport_reset = usb_stor_CB_reset;
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us->max_lun = 7;
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us->max_lun = 7;
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break;
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break;
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