On Thu, 8 Apr 2010, Oliver Neukum wrote: > Am Mittwoch, 7. April 2010 17:46:17 schrieb Alan Stern: > > Or alternatively, instead of allocating regular memory the routine > > could simply fail. Then the caller would be responsible for checking > > and using regular memory instead of dma-consistent memory. Of course, > > that would put an even larger burden on the caller than just forcing it > > to keep track of what flag to use. > > Then it would be sensible to pass it a filled URB, modify it or return > an error code. That would work, but it doesn't match the way existing drivers use the interface. For example, the audio driver allocates a 16-byte coherent buffer and then uses four bytes from it for each of four different URBs. Alan Stern -- 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
