解决89820

Change-Id: I4a0a433200c4f9d165155a1583800bfd9a50248f
diff --git a/mbtk/libmbtk_lib/ril/mbtk_info_api.c b/mbtk/libmbtk_lib/ril/mbtk_info_api.c
index 9fca322..4810742 100755
--- a/mbtk/libmbtk_lib/ril/mbtk_info_api.c
+++ b/mbtk/libmbtk_lib/ril/mbtk_info_api.c
@@ -343,6 +343,11 @@
     }
 
 read_thread_exit:
+    if(epoll_fd >= 0)
+    {
+        close(epoll_fd);
+        epoll_fd = 0;
+    }
     LOGD("info_read thread exit.");
     return NULL;
 }