Set tv work start time for bxf driver.
diff --git a/driver-bitfury.c b/driver-bitfury.c
index 8af616d..f171120 100644
--- a/driver-bitfury.c
+++ b/driver-bitfury.c
@@ -718,6 +718,7 @@ static void bxf_update_work(struct cgpu_info *bitfury, struct bitfury_info *info
work->subid = ++info->work_id;
mutex_unlock(&info->lock);
+ cgtime(&work->tv_work_start);
bxf_send_work(bitfury, work);
}