> -----Original Message----- > From: Sarah Sharp [mailto:sarah.a.sharp@xxxxxxxxxxxxxxx] > Sent: Saturday, April 03, 2010 3:34 AM > To: Greg KH > Cc: linux-usb@xxxxxxxxxxxxxxx; usb-storage@xxxxxxxxxxxxxxxxxxxxxxxx; > Hrant Dalalyan; Alan Stern; Paul Zimmerman; Ashot Madatyan > Subject: [PATCH 2/5] 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. Is this kind of patch planned to be done for scatter-gather requests? Now usb_sg_request structure has no stream_id field like urb structure. Also, there is no way to pass the stream_id field for the selected scatter-gather request using the usb_sg_init function. The only way to pass the stream_id field for each urb located in scatter-gather request is loop over the urb list of the scatter-gather request and set that field manually, which I think is not the best way. So, please provide your feedback. > > Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx> > --- > include/linux/usb.h | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/include/linux/usb.h b/include/linux/usb.h > index ce1323c..b6a1fb6 100644 > --- a/include/linux/usb.h > +++ b/include/linux/usb.h > @@ -1189,6 +1189,7 @@ 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 */ > -- > 1.6.3.3 Thanks, Hrant. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
