On 05/06/13 10:48, Hans de Goede wrote: > Due to various unfortunate reasons we cannot reliable detect a guest > cancelling a packet as soon as it happens, instead we detect cancels > with some delay. > > When packets are handled async, and we directly pass the guest memory for > the packet to the usb-device as iovec, this means that the usb-device can > write to guest-memory which the guest has already re-used for other purposes > -> not good! > > This patch fixes this by adding an intermediate buffer and writing back not > only the result, but also the data, of async completed packets when scanning > the schedule.
Patch added to usb patch queue, pull req sent. thanks, Gerd
