setupapi: Always return device info from SetupDiGetDeviceInterfaceDetail() if requested.

dlls/setupapi/devinst.c

@@ -2702,9 +2702,6 @@ BOOL WINAPI SetupDiGetDeviceInterfaceDetailA(HDEVINFO devinfo, SP_DEVICE_INTERFA
         else
             DeviceInterfaceDetailData->DevicePath[0] = '\0';
 
-        if (device_data && device_data->cbSize == sizeof(SP_DEVINFO_DATA))
-            copy_device_data(device_data, iface->device);
-
         ret = TRUE;
     }
     else
@@ -2713,6 +2710,10 @@ BOOL WINAPI SetupDiGetDeviceInterfaceDetailA(HDEVINFO devinfo, SP_DEVICE_INTERFA
             *RequiredSize = bytesNeeded;
         SetLastError(ERROR_INSUFFICIENT_BUFFER);
     }
+
+    if (device_data && device_data->cbSize == sizeof(SP_DEVINFO_DATA))
+        copy_device_data(device_data, iface->device);
+
     return ret;
 }
 
@@ -2757,9 +2758,6 @@ BOOL WINAPI SetupDiGetDeviceInterfaceDetailW(HDEVINFO devinfo, SP_DEVICE_INTERFA
         else
             DeviceInterfaceDetailData->DevicePath[0] = '\0';
 
-        if (device_data && device_data->cbSize == sizeof(SP_DEVINFO_DATA))
-            copy_device_data(device_data, iface->device);
-
         ret = TRUE;
     }
     else
@@ -2768,6 +2766,10 @@ BOOL WINAPI SetupDiGetDeviceInterfaceDetailW(HDEVINFO devinfo, SP_DEVICE_INTERFA
             *RequiredSize = bytesNeeded;
         SetLastError(ERROR_INSUFFICIENT_BUFFER);
     }
+
+    if (device_data && device_data->cbSize == sizeof(SP_DEVINFO_DATA))
+        copy_device_data(device_data, iface->device);
+
     return ret;
 }
 

dlls/setupapi/tests/devinst.c

@@ -752,6 +752,13 @@ static void test_device_iface_detail(void)
     ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "Got unexpected error %#x.\n", GetLastError());
     ok(size == expectedsize, "Got unexpected size %d.\n", size);
 
+    memset(&device, 0, sizeof(device));
+    device.cbSize = sizeof(device);
+    ret = SetupDiGetDeviceInterfaceDetailW(set, &iface, NULL, 0, &size, &device);
+    ok(!ret, "Expected failure.\n");
+    ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "Got unexpected error %#x.\n", GetLastError());
+    ok(IsEqualGUID(&device.ClassGuid, &guid), "Got unexpected class %s.\n", wine_dbgstr_guid(&device.ClassGuid));
+
     heap_free(detail);
     SetupDiDestroyDeviceInfoList(set);
 }