Scsi - Index of

992 if (transfer_length) {
993 unsigned int pipe = srb->sc_data_direction ==
DMA_FROM_DEVICE ?
994 us->recv_bulk_pipe : us->send_bulk_pipe;
995 result = usb_stor_bulk_transfer_sg(us, pipe,
996 srb->request_buffer, transfer_length,
997 srb->use_sg, &srb->resid);
998 US_DEBUGP("Bulk data transfer result 0x%x\n", result);
999 if (result == USB_STOR_XFER_ERROR)
1000 return USB_STOR_TRANSPORT_ERROR;
1001
1002 /* If the device tried to send back more data than the
1003 * amount requested, the spec requires us to transfer
1004 * the CSW anyway. Since there's no point retrying the
1005 * the command, we'll return fake sense data indicating
1006 * Illegal Request, Invalid Field in CDB.
1007 */
1008 if (result == USB_STOR_XFER_LONG)
1009 fake_sense = 1;
152
1010 }
1011
1012 /* See flow chart on pg 15 of the Bulk Only Transport spec for
1013 * an explanation of how this code works.
1014 */
1015
1016 /* get CSW for device status */
1017 US_DEBUGP("Attempting to get CSW...\n");
1018 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
1019 bcs, US_BULK_CS_WRAP_LEN, &cswlen);
1020
1021 /* Some broken devices add unnecessary zero-length packets to the
1022 * end of their data transfers. Such packets show up as 0-length
1023 * CSWs. If we encounter such a thing, try to read the CSW again.
1024 */
1025 if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
1026 US_DEBUGP("Received 0-length CSW; retrying...\n");
1027 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
1028 bcs, US_BULK_CS_WRAP_LEN, &cswlen);
1029 }
1030
1031 /* did the attempt to read the CSW fail? */
1032 if (result == USB_STOR_XFER_STALLED) {
1033