Fix fd_orphan in ev_epollsig_linux

src/core/lib/iomgr/ev_epollsig_linux.c

@@ -855,24 +855,12 @@ static int fd_wrapped_fd(grpc_fd *fd) {
 static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                       grpc_closure *on_done, int *release_fd,
                       const char *reason) {
-  bool is_fd_closed = false;
   grpc_error *error = GRPC_ERROR_NONE;
   polling_island *unref_pi = NULL;
 
   gpr_mu_lock(&fd->po.mu);
   fd->on_done_closure = on_done;
 
-  /* If release_fd is not NULL, we should be relinquishing control of the file
-     descriptor fd->fd (but we still own the grpc_fd structure). */
-  if (release_fd != NULL) {
-    *release_fd = fd->fd;
-  } else {
-    close(fd->fd);
-    is_fd_closed = true;
-  }
-
-  fd->orphaned = true;
-
   /* Remove the active status but keep referenced. We want this grpc_fd struct
      to be alive (and not added to freelist) until the end of this function */
   REF_BY(fd, 1, reason);
@@ -887,13 +875,24 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
        before doing this.) */
   if (fd->po.pi != NULL) {
     polling_island *pi_latest = polling_island_lock(fd->po.pi);
-    polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed, &error);
+    polling_island_remove_fd_locked(pi_latest, fd, false /* is_fd_closed */,
+                                    &error);
     gpr_mu_unlock(&pi_latest->mu);
 
     unref_pi = fd->po.pi;
     fd->po.pi = NULL;
   }
 
+  /* If release_fd is not NULL, we should be relinquishing control of the file
+     descriptor fd->fd (but we still own the grpc_fd structure). */
+  if (release_fd != NULL) {
+    *release_fd = fd->fd;
+  } else {
+    close(fd->fd);
+  }
+
+  fd->orphaned = true;
+
   GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error));
 
   gpr_mu_unlock(&fd->po.mu);