[Qemu-devel] [PATCH 2/5] igd-passthrough-i440FX: convert to realize()

[Cao jin]

Signed-off-by: Cao jin <caoj.f...@cn.fujitsu.com>
---
 hw/pci-host/piix.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 715208b..e3840f0 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -761,7 +761,7 @@ static const IGDHostInfo igd_host_bridge_infos[] = {
     {0xa8, 4},  /* SNB: base of GTT stolen memory */
 };
 
-static int host_pci_config_read(int pos, int len, uint32_t val)
+static int host_pci_config_read(int pos, int len, uint32_t val, Error **errp)
 {
     char path[PATH_MAX];
     int config_fd;
@@ -772,15 +772,18 @@ static int host_pci_config_read(int pos, int len, 
uint32_t val)
     int ret = 0;
 
     if (rc >= size || rc < 0) {
+        error_setg(errp, "No such device");
         return -ENODEV;
     }
 
     config_fd = open(path, O_RDWR);
     if (config_fd < 0) {
+        error_setg(errp, "No such device");
         return -ENODEV;
     }
 
     if (lseek(config_fd, pos, SEEK_SET) != pos) {
+        error_setg(errp, "lseek err: %s", strerror(errno));
         ret = -errno;
         goto out;
     }
@@ -789,13 +792,14 @@ static int host_pci_config_read(int pos, int len, 
uint32_t val)
     } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
     if (rc != len) {
         ret = -errno;
+        error_setg(errp, "read err: %s", strerror(errno));
     }
 out:
     close(config_fd);
     return ret;
 }
 
-static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
+static void igd_pt_i440fx_realize(struct PCIDevice *pci_dev, Error **errp)
 {
     uint32_t val = 0;
     int rc, i, num;
@@ -805,14 +809,12 @@ static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
     for (i = 0; i < num; i++) {
         pos = igd_host_bridge_infos[i].offset;
         len = igd_host_bridge_infos[i].len;
-        rc = host_pci_config_read(pos, len, val);
+        rc = host_pci_config_read(pos, len, val, errp);
         if (rc) {
-            return -ENODEV;
+            return;
         }
         pci_default_write_config(pci_dev, pos, val, len);
     }
-
-    return 0;
 }
 
 static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
@@ -820,7 +822,7 @@ static void igd_passthrough_i440fx_class_init(ObjectClass 
*klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
-    k->init = igd_pt_i440fx_initfn;
+    k->realize = igd_pt_i440fx_realize;
     dc->desc = "IGD Passthrough Host bridge";
 }
 
-- 
2.1.0