fix workqueue

src/core/lib/iomgr/ev_epollex_linux.c

@@ -278,9 +278,9 @@ static grpc_fd *fd_create(int fd, const char *name) {
   GRPC_LOG_IF_ERROR("fd_create",
                     grpc_wakeup_fd_init(&new_fd->workqueue_wakeup_fd));
   new_fd->workqueue_scheduler.vtable = &workqueue_scheduler_vtable;
-  new_fd->workqueue_read_mu = GPR_SPINLOCK_INIT;
+  new_fd->workqueue_read_mu = GPR_SPINLOCK_INITIALIZER;
   gpr_mpscq_init(&new_fd->workqueue_items);
-  gpr_atm_no_barrier_store(&new_fd->workqueue_item_count);
+  gpr_atm_no_barrier_store(&new_fd->workqueue_item_count, 0);
 
   new_fd->freelist_next = NULL;
   new_fd->on_done_closure = NULL;
@@ -414,14 +414,14 @@ static void workqueue_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
   GPR_TIMER_BEGIN("workqueue.enqueue", 0);
   grpc_fd *fd = (grpc_fd *)(((char *)closure->scheduler) -
                             offsetof(grpc_fd, workqueue_scheduler));
-  REF_BY(fd, 2);
+  REF_BY(fd, 2, "workqueue_enqueue");
   gpr_atm last = gpr_atm_no_barrier_fetch_add(&fd->workqueue_item_count, 1);
   closure->error_data.error = error;
   gpr_mpscq_push(&fd->workqueue_items, &closure->next_data.atm_next);
   if (last == 0) {
     workqueue_wakeup(fd);
   }
-  UNREF_BY(fd, 2);
+  UNREF_BY(fd, 2, "workqueue_enqueue");
 }
 
 static void fd_invoke_workqueue(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
@@ -430,15 +430,14 @@ static void fd_invoke_workqueue(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mpscq_node *n = gpr_mpscq_pop(&fd->workqueue_items);
   gpr_spinlock_unlock(&fd->workqueue_read_mu);
   if (n != NULL) {
-    if (gpr_atm_full_fetch_add(&pi->workqueue_item_count, -1) > 1) {
+    if (gpr_atm_full_fetch_add(&fd->workqueue_item_count, -1) > 1) {
       workqueue_wakeup(fd);
     }
     grpc_closure *c = (grpc_closure *)n;
     grpc_error *error = c->error_data.error;
     c->cb(exec_ctx, c->cb_arg, error);
     GRPC_ERROR_UNREF(error);
-    return true;
-  } else if (gpr_atm_no_barrier_load(&pi->workqueue_item_count) > 0) {
+  } else if (gpr_atm_no_barrier_load(&fd->workqueue_item_count) > 0) {
     /* n == NULL might mean there's work but it's not available to be popped
      * yet - try to ensure another workqueue wakes up to check shortly if so
      */