On Mon, 7 Nov 2011, Sebastian Andrzej Siewior wrote: > * Alan Stern | 2011-11-04 13:24:58 [-0400]: > > >On Fri, 4 Nov 2011, Sebastian Andrzej Siewior wrote: > > > >> This patch adds sg support to dummy_hcd. It seems that uas is not able > >> to work with a hcd which does not support sg only based transfers. > > > >While I'm not opposed in principle to adding SG support to dummy-hcd, > >it might make more sense in this case to fix the UAS driver. After > >all, there's no rule that UAS devices have to run at SuperSpeed. This > >means that a UAS device could be plugged in under any host controller, > >and the driver ought to be able to handle it. > > ehci supports sg others may not. So fixing uas would mean we should add > something like usb_sg_init() (which seems to handle sgs) into > uas_alloc_data_urb(). So we get better support and miss only the highmem > case. Right. You'd have to figure out the details; I'm not familiar with the code in uas.c. 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
