Am Donnerstag, 8. April 2010 18:59:38 schrieb Alan Stern: > 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. That will not work with any fallback that does not yield a coherent buffer. Regards Oliver _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
