Am Donnerstag, den 30.03.2017, 01:15 +0300 schrieb Laurent Pinchart: > > + may also override PAD bytes at the end of the ``transfer_buffer``, up to > > the > > + size of the CPU word. > > "May" is quite weak here. If some host controller drivers require buffers to > be aligned, then it's an API requirement, and all buffers must be aligned. I'm > not even sure I would mention that some host drivers require it, I think we > should just state that the API requires buffers to be aligned. That effectively changes the API. Many network drivers are written with the assumption that any contiguous buffer is valid. In fact you could argue that those drivers are buggy and must use bounce buffers in those cases. So we need to include the full story here. Regards Oliver
