Fix a race condition when receiving events before unmasking interrupts

2026-07-13 20:23:20 +02:00
parent b2ed85ea0d
commit a01d3ce6e5
1 changed files with 11 additions and 0 deletions
@@ -240,9 +240,20 @@ impl<const N: usize> IrqReactor<N> {
                            warn!("xhci: Received interrupt, but no event was found in the event ring. Ignoring interrupt.")
                        }
                        self.unmask_interrupts();
+
+                        // Process any events received between the NoEvent and unmasking interrupts
+                        loop {
+                            match self.process_one_event(&mut event_ring, &mut event_trb_index) {
+                                EventProcessResult::NoEvent => break,
+                                EventProcessResult::EventRingFull
+                                | EventProcessResult::RegularEvent => {}
+                            }
+                        }
+
                        continue 'trb_loop;
                    }
                    EventProcessResult::EventRingFull => {
+                        // FIXME can this use the RegularEvent path?
                        if self.hci.interrupt_is_pending(0) {
                            warn!("After incrementing the dequeue pointer, the interrupt bit is still pending.")
                        } else {