Re: Is usb_buffer_alloc a generic URB buffer allocator ? (was Split Bulk Transfers)
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Tuesday 15 May 2007, Laurent Pinchart wrote: > Hi everybody, > > following the discussion about the split bulk transfers, Alan Stern and David > Brownell told me I shouldn't use usb_buffer_alloc as a generic purpose URB > buffer allocated. However, Documentation/usb/dma.txt contradicts this. Should > the documentation be fixed, or can/should usb_buffer_alloc be used to > allocate URB buffers ? I think the doc should be fixed ... avoid using it as a general purpose allocator. We've learned better since that doc was first written. :) It *can* be used to allocate buffers, in cases where the DMA map/unmap overhead of the more typical usage would excessive. So it's not going to vanish. - Dave ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel