USB: Add stream ID field to struct urb.

Bulk endpoint streams were added in the USB 3.0 specification.  Streams
allow a device driver to overload a bulk endpoint so that multiple
transfers can be queued at once.

Add a new field, stream_id, to struct urb so that USB 3.0 drivers can
specify which stream they want the URB to be queued to.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/usb.h b/include/linux/usb.h
index e32a849..191af49 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1196,6 +1196,7 @@ struct urb {
        struct usb_device *dev;         /* (in) pointer to associated device */
        struct usb_host_endpoint *ep;   /* (internal) pointer to endpoint */
        unsigned int pipe;              /* (in) pipe information */
+       unsigned int stream_id;         /* (in) stream ID */
        int status;                     /* (return) non-ISO status */
        unsigned int transfer_flags;    /* (in) URB_SHORT_NOT_OK | ...*/
        void *transfer_buffer;          /* (in) associated data buffer */