From a820b575787ac0b6b274b6a89aa6ef9813b4c782 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Fri, 14 Dec 2012 13:10:39 +0100 Subject: [PATCH] xhci: call set-address with dummy usbpacket Due to the way devices are addressed with xhci (done by hardware, not the guest os) there is no packet when invoking the set-address control request. Create a dummy packet in that case to avoid null pointer dereferences. Signed-off-by: Gerd Hoffmann --- hw/usb/hcd-xhci.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index 40542b8d05..9132920932 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -1970,13 +1970,18 @@ static TRBCCode xhci_address_slot(XHCIState *xhci, unsigned int slotid, if (bsr) { slot_ctx[3] = SLOT_DEFAULT << SLOT_STATE_SHIFT; } else { + USBPacket p; slot->devaddr = xhci->devaddr++; slot_ctx[3] = (SLOT_ADDRESSED << SLOT_STATE_SHIFT) | slot->devaddr; DPRINTF("xhci: device address is %d\n", slot->devaddr); usb_device_reset(dev); - usb_device_handle_control(dev, NULL, + usb_packet_setup(&p, USB_TOKEN_OUT, + usb_ep_get(dev, USB_TOKEN_OUT, 0), + 0, false, false); + usb_device_handle_control(dev, &p, DeviceOutRequest | USB_REQ_SET_ADDRESS, slot->devaddr, 0, 0, NULL); + assert(p.status != USB_RET_ASYNC); } res = xhci_enable_ep(xhci, slotid, 1, octx+32, ep0_ctx); -- 2.30.2