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-rw-r--r--hw/usb/hcd-ehci.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 320b7e7..7040659 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2092,18 +2092,22 @@ static void ehci_advance_state(EHCIState *ehci, int async)
break;
case EST_ADVANCEQUEUE:
+ assert(q != NULL);
again = ehci_state_advqueue(q);
break;
case EST_FETCHQTD:
+ assert(q != NULL);
again = ehci_state_fetchqtd(q);
break;
case EST_HORIZONTALQH:
+ assert(q != NULL);
again = ehci_state_horizqh(q);
break;
case EST_EXECUTE:
+ assert(q != NULL);
again = ehci_state_execute(q);
if (async) {
ehci->async_stepdown = 0;