ide: Register vm change state handler once only

We register the vm change state handler in a PCI BAR map() function.
This function can be called multiple times throughout the lifetime of a
PCI IDE device.  This results in duplicate vm change state handlers
being register, none of which are ever unregistered.

Instead, register the vm change state handler in the device's init
function once and for all.

piix tested, cmd646 and via not tested.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

3 files changed, 58 insertions, 28 deletions

diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c
index e191ee6c5f..89ba83629b 100644
--- a/hw/ide/cmd646.c
+++ b/hw/ide/cmd646.c
@@ -167,10 +167,6 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num,
 
     for(i = 0;i < 2; i++) {
         BMDMAState *bm = &d->bmdma[i];
-        bmdma_init(&d->bus[i], bm);
-        bm->bus = d->bus+i;
-        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
-                                         &bm->dma);
 
         if (i == 0) {
             register_ioport_write(addr, 4, 1, bmdma_writeb_0, d);
@@ -228,6 +224,7 @@ static int pci_cmd646_ide_initfn(PCIDevice *dev)
     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
     uint8_t *pci_conf = d->dev.config;
     qemu_irq *irq;
+    int i;
 
     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_CMD);
     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_CMD_646);
@@ -253,10 +250,15 @@ static int pci_cmd646_ide_initfn(PCIDevice *dev)
     pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1
 
     irq = qemu_allocate_irqs(cmd646_set_irq, d, 2);
-    ide_bus_new(&d->bus[0], &d->dev.qdev, 0);
-    ide_bus_new(&d->bus[1], &d->dev.qdev, 1);
-    ide_init2(&d->bus[0], irq[0]);
-    ide_init2(&d->bus[1], irq[1]);
+    for (i = 0; i < 2; i++) {
+        ide_bus_new(&d->bus[i], &d->dev.qdev, i);
+        ide_init2(&d->bus[i], irq[i]);
+
+        bmdma_init(&d->bus[i], &d->bmdma[i]);
+        bm->bus = &d->bus[i];
+        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
+                                         &d->bmdma[i]->dma);
+    }
 
     vmstate_register(&dev->qdev, 0, &vmstate_ide_pci, d);
     qemu_register_reset(cmd646_reset, d);
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index a6b5d92820..1cad9066a0 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -76,10 +76,6 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num,
 
     for(i = 0;i < 2; i++) {
         BMDMAState *bm = &d->bmdma[i];
-        bmdma_init(&d->bus[i], bm);
-        bm->bus = d->bus+i;
-        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
-                                         &bm->dma);
 
         register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm);
 
@@ -112,6 +108,29 @@ static void piix3_reset(void *opaque)
     pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
 }
 
+static void pci_piix_init_ports(PCIIDEState *d) {
+    int i;
+    struct {
+        int iobase;
+        int iobase2;
+        int isairq;
+    } port_info[] = {
+        {0x1f0, 0x3f6, 14},
+        {0x170, 0x376, 15},
+    };
+
+    for (i = 0; i < 2; i++) {
+        ide_bus_new(&d->bus[i], &d->dev.qdev, i);
+        ide_init_ioport(&d->bus[i], port_info[i].iobase, port_info[i].iobase2);
+        ide_init2(&d->bus[i], isa_reserve_irq(port_info[i].isairq));
+
+        bmdma_init(&d->bus[i], &d->bmdma[i]);
+        d->bmdma[i].bus = &d->bus[i];
+        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
+                                         &d->bmdma[i].dma);
+    }
+}
+
 static int pci_piix_ide_initfn(PCIIDEState *d)
 {
     uint8_t *pci_conf = d->dev.config;
@@ -125,13 +144,8 @@ static int pci_piix_ide_initfn(PCIIDEState *d)
 
     vmstate_register(&d->dev.qdev, 0, &vmstate_ide_pci, d);
 
-    ide_bus_new(&d->bus[0], &d->dev.qdev, 0);
-    ide_bus_new(&d->bus[1], &d->dev.qdev, 1);
-    ide_init_ioport(&d->bus[0], 0x1f0, 0x3f6);
-    ide_init_ioport(&d->bus[1], 0x170, 0x376);
+    pci_piix_init_ports(d);
 
-    ide_init2(&d->bus[0], isa_reserve_irq(14));
-    ide_init2(&d->bus[1], isa_reserve_irq(15));
     return 0;
 }
 
diff --git a/hw/ide/via.c b/hw/ide/via.c
index 2603110ced..5b70bd2578 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -78,10 +78,6 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num,
 
     for(i = 0;i < 2; i++) {
         BMDMAState *bm = &d->bmdma[i];
-        bmdma_init(&d->bus[i], bm);
-        bm->bus = d->bus+i;
-        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
-                                         &bm->dma);
 
         register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm);
 
@@ -135,6 +131,29 @@ static void via_reset(void *opaque)
     pci_set_long(pci_conf + 0xc0, 0x00020001);
 }
 
+static void vt82c686b_init_ports(PCIIDEState *d) {
+    int i;
+    struct {
+        int iobase;
+        int iobase2;
+        int isairq;
+    } port_info[] = {
+        {0x1f0, 0x3f6, 14},
+        {0x170, 0x376, 15},
+    };
+
+    for (i = 0; i < 2; i++) {
+        ide_bus_new(&d->bus[i], &d->dev.qdev, i);
+        ide_init_ioport(&d->bus[i], port_info[i].iobase, port_info[i].iobase2);
+        ide_init2(&d->bus[i], isa_reserve_irq(port_info[i].isairq));
+
+        bmdma_init(&d->bus[i], &d->bmdma[i]);
+        d->bmdma[i].bus = &d->bus[i];
+        qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
+                                         &d->bmdma[i]->dma);
+    }
+}
+
 /* via ide func */
 static int vt82c686b_ide_initfn(PCIDevice *dev)
 {
@@ -154,12 +173,7 @@ static int vt82c686b_ide_initfn(PCIDevice *dev)
 
     vmstate_register(&dev->qdev, 0, &vmstate_ide_pci, d);
 
-    ide_bus_new(&d->bus[0], &d->dev.qdev, 0);
-    ide_bus_new(&d->bus[1], &d->dev.qdev, 1);
-    ide_init2(&d->bus[0], isa_reserve_irq(14));
-    ide_init2(&d->bus[1], isa_reserve_irq(15));
-    ide_init_ioport(&d->bus[0], 0x1f0, 0x3f6);
-    ide_init_ioport(&d->bus[1], 0x170, 0x376);
+    vt82c686b_init_ports(d);
 
     return 0;
 }