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usb-ehci: sanity-check iso xfers 

This patch adds a sanity check to itd processing to make sure the
endpoint addressed by the guest is actually an iso endpoint.  Also
verify that usb drivers don't return USB_RET_ASYNC which is illegal for
iso xfers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
master
Gerd Hoffmann 2012-02-27 11:23:08 +01:00
parent 808aeb98ff
commit aa0568ff25
1 changed files with 10 additions and 6 deletions
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16
hw/usb-ehci.c
View File

@ -1459,12 +1459,16 @@ static int ehci_process_itd(EHCIState *ehci,
dev = ehci_find_device(ehci, devaddr);
ep = usb_ep_get(dev, pid, endp);
usb_packet_setup(&ehci->ipacket, pid, ep);
usb_packet_map(&ehci->ipacket, &ehci->isgl);
ret = usb_handle_packet(dev, &ehci->ipacket);
usb_packet_unmap(&ehci->ipacket);
if (ep->type == USB_ENDPOINT_XFER_ISOC) {
usb_packet_setup(&ehci->ipacket, pid, ep);
usb_packet_map(&ehci->ipacket, &ehci->isgl);
ret = usb_handle_packet(dev, &ehci->ipacket);
assert(ret != USB_RET_ASYNC);
usb_packet_unmap(&ehci->ipacket);
} else {
DPRINTF("ISOCH: attempt to addess non-iso endpoint\n");
ret = USB_RET_NAK;
}
qemu_sglist_destroy(&ehci->isgl);
#if 0