diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c index afb16704221c..82769a411974 100644 --- a/drivers/staging/hv/vmbus_drv.c +++ b/drivers/staging/hv/vmbus_drv.c @@ -255,21 +255,31 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) return ret; } +static uuid_le null_guid; + +static inline bool is_null_guid(const __u8 *guid) +{ + if (memcmp(guid, &null_guid, sizeof(uuid_le))) + return false; + return true; +} + /* * vmbus_match - Attempt to match the specified device to the specified driver */ static int vmbus_match(struct device *device, struct device_driver *driver) { - int match = 0; struct hv_driver *drv = drv_to_hv_drv(driver); struct hv_device *hv_dev = device_to_hv_device(device); + const struct hv_vmbus_device_id *id_array = drv->id_table; - /* We found our driver ? */ - if (!uuid_le_cmp(hv_dev->dev_type, drv->dev_type)) - match = 1; + for (; !is_null_guid(id_array->guid); id_array++) + if (!memcmp(&id_array->guid, &hv_dev->dev_type.b, + sizeof(struct hv_vmbus_device_id))) + return 1; - return match; + return 0; } /*