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-rw-r--r--hw/usb-ehci.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c
index cdd5aae1e9..3eea94d09e 100644
--- a/hw/usb-ehci.c
+++ b/hw/usb-ehci.c
@@ -2046,6 +2046,7 @@ static void ehci_advance_state(EHCIState *ehci,
             break;
 
         case EST_WRITEBACK:
+            assert(q != NULL);
             again = ehci_state_writeback(q, async);
             break;