Call piix3_reset() on system reset.

Also zero pci_irq_levels on reset to avoid stuck irq after reset.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NYaniv Kamay <ykamay@redhat.com>

hw/piix_pci.c

@@ -232,8 +232,9 @@ static void piix3_set_irq(qemu_irq *pic, int irq_num, int level)
     }
 }
 
-static void piix3_reset(PCIDevice *d)
+static void piix3_reset(void *opaque)
 {
+    PCIDevice *d = opaque;
     uint8_t *pci_conf = d->config;
 
     pci_conf[0x04] = 0x07; // master, memory and I/O
@@ -267,6 +268,8 @@ static void piix3_reset(PCIDevice *d)
     pci_conf[0xab] = 0x00;
     pci_conf[0xac] = 0x00;
     pci_conf[0xae] = 0x00;
+
+    memset(pci_irq_levels, 0, sizeof(pci_irq_levels));
 }
 
 static void piix4_reset(PCIDevice *d)
@@ -339,6 +342,7 @@ int piix3_init(PCIBus *bus, int devfn)
         PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
 
     piix3_reset(d);
+    qemu_register_reset(piix3_reset, 0, d);
     return d->devfn;
 }