pci.c: Add opaque argument to pci_for_each_device.

The purpose is to have a more generic pci_for_each_device by passing an extra
argument to the function called on every device.

This patch will be used in a next patch.
Signed-off-by: NAnthony PERARD <anthony.perard@citrix.com>
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

hw/pci.c

@@ -1144,7 +1144,9 @@ static const pci_class_desc pci_class_descriptions[] =
 };
 
 static void pci_for_each_device_under_bus(PCIBus *bus,
-                                          void (*fn)(PCIBus *b, PCIDevice *d))
+                                          void (*fn)(PCIBus *b, PCIDevice *d,
+                                                     void *opaque),
+                                          void *opaque)
 {
     PCIDevice *d;
     int devfn;
@@ -1152,18 +1154,19 @@ static void pci_for_each_device_under_bus(PCIBus *bus,
     for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
         d = bus->devices[devfn];
         if (d) {
-            fn(bus, d);
+            fn(bus, d, opaque);
         }
     }
 }
 
 void pci_for_each_device(PCIBus *bus, int bus_num,
-                         void (*fn)(PCIBus *b, PCIDevice *d))
+                         void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
+                         void *opaque)
 {
     bus = pci_find_bus_nr(bus, bus_num);
 
     if (bus) {
-        pci_for_each_device_under_bus(bus, fn);
+        pci_for_each_device_under_bus(bus, fn, opaque);
     }
 }
 

hw/pci.h

@@ -312,7 +312,9 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
 PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
                                const char *default_devaddr);
 int pci_bus_num(PCIBus *s);
-void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d));
+void pci_for_each_device(PCIBus *bus, int bus_num,
+                         void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
+                         void *opaque);
 PCIBus *pci_find_root_bus(int domain);
 int pci_find_domain(const PCIBus *bus);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);

hw/xen_platform.c

@@ -83,7 +83,7 @@ static void log_writeb(PCIXenPlatformState *s, char val)
 #define UNPLUG_ALL_NICS 2
 #define UNPLUG_AUX_IDE_DISKS 4
 
-static void unplug_nic(PCIBus *b, PCIDevice *d)
+static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
 {
     if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
             PCI_CLASS_NETWORK_ETHERNET) {
@@ -96,10 +96,10 @@ static void unplug_nic(PCIBus *b, PCIDevice *d)
 
 static void pci_unplug_nics(PCIBus *bus)
 {
-    pci_for_each_device(bus, 0, unplug_nic);
+    pci_for_each_device(bus, 0, unplug_nic, NULL);
 }
 
-static void unplug_disks(PCIBus *b, PCIDevice *d)
+static void unplug_disks(PCIBus *b, PCIDevice *d, void *o)
 {
     if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
             PCI_CLASS_STORAGE_IDE) {
@@ -109,7 +109,7 @@ static void unplug_disks(PCIBus *b, PCIDevice *d)
 
 static void pci_unplug_disks(PCIBus *bus)
 {
-    pci_for_each_device(bus, 0, unplug_disks);
+    pci_for_each_device(bus, 0, unplug_disks, NULL);
 }
 
 static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val)