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xhci: check device is not NULL before calling usb_ep_get() 

Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Message-id: 1549460216-25808-4-git-send-email-liam.merwick@oracle.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Liam Merwick 2019-02-06 13:36:50 +00:00 committed by Gerd Hoffmann
parent 92cf34279c
commit 7cb513aa34
1 changed files with 2 additions and 2 deletions
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4
hw/usb/hcd-xhci.c
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@ -3276,10 +3276,10 @@ static USBEndpoint *xhci_epid_to_usbep(XHCIEPContext *epctx)
return NULL;
}
uport = epctx->xhci->slots[epctx->slotid - 1].uport;
token = (epctx->epid & 1) ? USB_TOKEN_IN : USB_TOKEN_OUT;
if (!uport) {
if (!uport || !uport->dev) {
return NULL;
}
token = (epctx->epid & 1) ? USB_TOKEN_IN : USB_TOKEN_OUT;
return usb_ep_get(uport->dev, token, epctx->epid >> 1);
}