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nec-usb-xhci: set the device state to USB_STATE_DEFAULT

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This patch is a rough fix to "hw/usb/core.c:401: usb_handle_packet:
 Assertion `dev->state == 3' failed.". Qemu will crash when a usb3
device redirect to Windows7 VM via nec-usb-xhci.

In extensible-host-controler-interface-usb-xhci.pdf P94(4.6.5
Address Device):
    • If the Block Set Address Request (BSR) flag = ‘1’
        • If the slot is in the Enabled state:
            ...
            • Set the Slot State in the Output Slot Context to Default.

BSR = ‘1’: Enabled state to Default state; BSR = ‘0’: Default state
to Addressed state. Try to call usb_device_reset to set device state
to USB_STATE_DEFAULT in xhci_address_slot wether bsr is zero.

Signed-off-by: Zhang Shuaiyi <zhang_syi@massclouds.com>
Message-id: 1467258640-11921-1-git-send-email-zhang_syi@massclouds.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Zhang Shuaiyi 2016-06-29 23:50:40 -04:00 committed by Gerd Hoffmann
parent f1ef557866
commit a4055d8586
1 changed files with 2 additions and 1 deletions
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3
hw/usb/hcd-xhci.c
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@ -2364,6 +2364,8 @@ static TRBCCode xhci_address_slot(XHCIState *xhci, unsigned int slotid,
slot->uport = uport;
slot->ctx = octx;
/* Make sure device is in USB_STATE_DEFAULT state */
usb_device_reset(dev);
if (bsr) {
slot_ctx[3] = SLOT_DEFAULT << SLOT_STATE_SHIFT;
} else {
@ -2371,7 +2373,6 @@ static TRBCCode xhci_address_slot(XHCIState *xhci, unsigned int slotid,
uint8_t buf[1];
slot_ctx[3] = (SLOT_ADDRESSED << SLOT_STATE_SHIFT) | slotid;
usb_device_reset(dev);
memset(&p, 0, sizeof(p));
usb_packet_addbuf(&p, buf, sizeof(buf));
usb_packet_setup(&p, USB_TOKEN_OUT,