From 0b77995819a596f96c621697643e83624126e668 Mon Sep 17 00:00:00 2001
From: Li Feng <fengli@smartx.com>
Date: Mon, 23 Mar 2020 13:29:24 +0800
Subject: [PATCH 13/14] fix vhost_user_blk_watch crash

the G_IO_HUP is watched in tcp_chr_connect, and the callback
vhost_user_blk_watch is not needed, because tcp_chr_hup is registered as
callback. And it will close the tcp link.

Signed-off-by: Li Feng <fengli@smartx.com>
Message-Id: <20200323052924.29286-1-fengli@smartx.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Peng Liang <liangpeng10@huawei.com>
---
 hw/block/vhost-user-blk.c          | 19 -------------------
 include/hw/virtio/vhost-user-blk.h |  1 -
 2 files changed, 20 deletions(-)

diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index 85bc4017e7e9..dc66f8a5febd 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -346,18 +346,6 @@ static void vhost_user_blk_disconnect(DeviceState *dev)
     vhost_dev_cleanup(&s->dev);
 }
 
-static gboolean vhost_user_blk_watch(GIOChannel *chan, GIOCondition cond,
-                                     void *opaque)
-{
-    DeviceState *dev = opaque;
-    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
-    VHostUserBlk *s = VHOST_USER_BLK(vdev);
-
-    qemu_chr_fe_disconnect(&s->chardev);
-
-    return true;
-}
-
 static void vhost_user_blk_event(void *opaque, int event)
 {
     DeviceState *dev = opaque;
@@ -370,15 +358,9 @@ static void vhost_user_blk_event(void *opaque, int event)
             qemu_chr_fe_disconnect(&s->chardev);
             return;
         }
-        s->watch = qemu_chr_fe_add_watch(&s->chardev, G_IO_HUP,
-                                         vhost_user_blk_watch, dev);
         break;
     case CHR_EVENT_CLOSED:
         vhost_user_blk_disconnect(dev);
-        if (s->watch) {
-            g_source_remove(s->watch);
-            s->watch = 0;
-        }
         break;
     }
 }
@@ -419,7 +401,6 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
 
     s->inflight = g_new0(struct vhost_inflight, 1);
     s->vqs = g_new(struct vhost_virtqueue, s->num_queues);
-    s->watch = 0;
     s->connected = false;
 
     qemu_chr_fe_set_handlers(&s->chardev,  NULL, NULL, vhost_user_blk_event,
diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h
index 8dbf11c6f071..ad9b742a644c 100644
--- a/include/hw/virtio/vhost-user-blk.h
+++ b/include/hw/virtio/vhost-user-blk.h
@@ -38,7 +38,6 @@ typedef struct VHostUserBlk {
     struct vhost_inflight *inflight;
     VhostUserState vhost_user;
     struct vhost_virtqueue *vqs;
-    guint watch;
     bool connected;
 } VHostUserBlk;
 
-- 
2.26.2