tdm: the return value from read() should be checked

Change-Id: I53526cb576f16eca858a900394f77d6af70544db

diff --git a/src/backend/tdm/tdm_buffer_queue.c b/src/backend/tdm/tdm_buffer_queue.c
index 40e6353..6f0e497 100644 (file)
--- a/src/backend/tdm/tdm_buffer_queue.c
+++ b/src/backend/tdm/tdm_buffer_queue.c
@@ -300,9 +300,10 @@ buffer_queue_handle_acquirable_efd(int fd, uint32_t mask, void *data)
 {
     struct ds_tdm_buffer_queue *queue = data;
     uint64_t acquirable_event;
+    int len;
 
-    if (read(fd, &acquirable_event, sizeof(acquirable_event)) < 0 &&
-            errno != EAGAIN)
+    len = read(fd, &acquirable_event, sizeof(acquirable_event));
+    if (len < 0 && errno != EAGAIN)
         return -1;
 
     wl_signal_emit(&queue->events.acquirable, queue);