dev: Correctly clear interrupts in VirtIO PCI

Correctly clear the PCI interrupt belonging to a VirtIO device when the ISR register is read.
2015-02-03 14:25:47 -05:00
parent b34b55b597
commit 851b29ad20
1 changed files with 5 additions and 2 deletions
--- a/src/dev/virtio/pci.cc
+++ b/src/dev/virtio/pci.cc
@@ -123,8 +123,11 @@ PciVirtIO::read(PacketPtr pkt)
      case OFF_ISR_STATUS: {
          DPRINTF(VIOPci, "   ISR_STATUS\n");
          assert(size == sizeof(uint8_t));
-          uint8_t isr_status(interruptDeliveryPending ? 1 : 0);
-          interruptDeliveryPending = false;
+          const uint8_t isr_status(interruptDeliveryPending ? 1 : 0);
+          if (interruptDeliveryPending) {
+              interruptDeliveryPending = false;
+              intrClear();
+          }
          pkt->set<uint8_t>(isr_status);
      } break;