Merge remote-tracking branch 'remotes/famz/tags/block-pull-request' into staging

Block patches

One fix from Paolo on nvme:// driver.
One fix from Marc-Andre for iothread.

# gpg: Signature made Fri 12 Oct 2018 02:49:42 BST
# gpg:                using RSA key CA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021  AD56 CA35 624C 6A91 71C6

* remotes/famz/tags/block-pull-request:
  nvme: correct locking around completion
  iothread: fix crash with invalid properties
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

block/nvme.c

@@ -489,10 +489,8 @@ static void nvme_handle_event(EventNotifier *n)
     BDRVNVMeState *s = container_of(n, BDRVNVMeState, irq_notifier);
 
     trace_nvme_handle_event(s);
-    aio_context_acquire(s->aio_context);
     event_notifier_test_and_clear(n);
     nvme_poll_queues(s);
-    aio_context_release(s->aio_context);
 }
 
 static bool nvme_add_io_queue(BlockDriverState *bs, Error **errp)

iothread.c

@@ -110,6 +110,7 @@ static void iothread_instance_init(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread->poll_max_ns = IOTHREAD_POLL_MAX_NS_DEFAULT;
+    iothread->thread_id = -1;
 }
 
 static void iothread_instance_finalize(Object *obj)
@@ -117,6 +118,11 @@ static void iothread_instance_finalize(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread_stop(iothread);
+
+    if (iothread->thread_id != -1) {
+        qemu_cond_destroy(&iothread->init_done_cond);
+        qemu_mutex_destroy(&iothread->init_done_lock);
+    }
     /*
      * Before glib2 2.33.10, there is a glib2 bug that GSource context
      * pointer may not be cleared even if the context has already been
@@ -135,8 +141,6 @@ static void iothread_instance_finalize(Object *obj)
         g_main_context_unref(iothread->worker_context);
         iothread->worker_context = NULL;
     }
-    qemu_cond_destroy(&iothread->init_done_cond);
-    qemu_mutex_destroy(&iothread->init_done_lock);
 }
 
 static void iothread_complete(UserCreatable *obj, Error **errp)
@@ -147,7 +151,6 @@ static void iothread_complete(UserCreatable *obj, Error **errp)
 
     iothread->stopping = false;
     iothread->running = true;
-    iothread->thread_id = -1;
     iothread->ctx = aio_context_new(&local_error);
     if (!iothread->ctx) {
         error_propagate(errp, local_error);