Ought to be fine, so long as the controller does DMA right, unless the UHCI spec demands otherwise.
Most of the host controllers only demand alignment for their control infrastructure (QH, TD/ED, etc) so far as I've seen. I think the expectation is that device drivers are better off not having to copy transfer buffers to force alighment. - Dave ----- Original Message ----- From: "Johannes Erdfelt" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, November 07, 2001 5:33 PM Subject: Re: [linux-usb-devel] uchi lockup > On Wed, Nov 07, 2001, Matthew Dharm <[EMAIL PROTECTED]> wrote: > > Interesting... off the cuff, does uhci.o have any known problems with > > misaligned buffers? > > None that I know of. > > IIRC, the UHCI spec allows transfers from misaligned buffers. However, > we go through a layer of indirection with the PCI DMA API. I wonder if > it's safe. > > JE > > _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
