From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxx>
CC: Matthew Dharm <mdharm-usb@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/storage/transport.c | 61 ++++++---------------------------------
drivers/usb/storage/transport.h | 2 -
drivers/usb/storage/usb.c | 2 +-
3 files changed, 10 insertions(+), 55 deletions(-)
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index f584e72..9cc30af 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -756,10 +756,10 @@ void usb_stor_stop_transport(struct us_data *us)
}
/*
- * Control/Bulk/Interrupt transport
+ * Control/Bulk and Control/Bulk/Interrupt transport
*/
-int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
+int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us)
{
unsigned int transfer_length = scsi_bufflen(srb);
unsigned int pipe = 0;
@@ -801,6 +801,13 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
}
/* STATUS STAGE */
+
+ /* NOTE: CB does not have a status stage. Silly, I know. So
+ * we have to catch this at a higher level.
+ */
+ if (us->protocol != US_PR_CBI)
+ return USB_STOR_TRANSPORT_GOOD;
+
result = usb_stor_intr_transfer(us, us->iobuf, 2);
US_DEBUGP("Got interrupt data (0x%x, 0x%x)\n",
us->iobuf[0], us->iobuf[1]);
@@ -855,56 +862,6 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us)
}
/*
- * Control/Bulk transport
- */
-int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us)
-{
- unsigned int transfer_length = scsi_bufflen(srb);
- int result;
-
- /* COMMAND STAGE */
- /* let's send the command via the control pipe */
- result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
- US_CBI_ADSC,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
- us->ifnum, srb->cmnd, srb->cmd_len);
-
- /* check the return code for the command */
- US_DEBUGP("Call to usb_stor_ctrl_transfer() returned %d\n", result);
-
- /* if we stalled the command, it means command failed */
- if (result == USB_STOR_XFER_STALLED) {
- return USB_STOR_TRANSPORT_FAILED;
- }
-
- /* Uh oh... serious problem here */
- if (result != USB_STOR_XFER_GOOD) {
- return USB_STOR_TRANSPORT_ERROR;
- }
-
- /* DATA STAGE */
- /* transfer the data payload for this command, if one exists*/
- if (transfer_length) {
- unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ?
- us->recv_bulk_pipe : us->send_bulk_pipe;
- result = usb_stor_bulk_srb(us, pipe, srb);
- US_DEBUGP("CB data stage result is 0x%x\n", result);
-
- /* if we stalled the data transfer it means command failed */
- if (result == USB_STOR_XFER_STALLED)
- return USB_STOR_TRANSPORT_FAILED;
- if (result > USB_STOR_XFER_STALLED)
- return USB_STOR_TRANSPORT_ERROR;
- }
-
- /* STATUS STAGE */
- /* NOTE: CB does not have a status stage. Silly, I know. So
- * we have to catch this at a higher level.
- */
- return USB_STOR_TRANSPORT_GOOD;
-}
-
-/*
* Bulk only transport
*/
diff --git a/drivers/usb/storage/transport.h b/drivers/usb/storage/transport.h
index e70b881..242ff5e 100644
--- a/drivers/usb/storage/transport.h
+++ b/drivers/usb/storage/transport.h
@@ -113,8 +113,6 @@ struct bulk_cs_wrap {
#define US_CBI_ADSC 0
-extern int usb_stor_CBI_transport(struct scsi_cmnd *, struct us_data*);
-
extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
extern int usb_stor_CB_reset(struct us_data*);
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 099e07c..cdd009f 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -591,7 +591,7 @@ static int get_transport(struct us_data *us)
case US_PR_CBI:
us->transport_name = "Control/Bulk/Interrupt";
- us->transport = usb_stor_CBI_transport;
+ us->transport = usb_stor_CB_transport;
us->transport_reset = usb_stor_CB_reset;
us->max_lun = 7;
break;
--
1.6.0.4
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