[Qemu-devel] [PATCH] vhost-user-scsi: Call virtio_scsi_common_unrealize() when device realize failed

[Paolo Bonzini <pbonzini@redhat.com>]

From: Xie Yongji <xieyongji@baidu.com>

This avoids memory leak when device hotplug is failed.

Signed-off-by: Xie Yongji <xieyongji@baidu.com>
Message-Id: <20190717004606.12444-2-xieyongji@baidu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/vhost-user-scsi.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c
index a0b69fbc0f..665939df19 100644
--- a/hw/scsi/vhost-user-scsi.c
+++ b/hw/scsi/vhost-user-scsi.c
@@ -87,7 +87,7 @@ static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
     }
 
     if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
-        return;
+        goto free_virtio;
     }
 
     vsc->dev.nvqs = 2 + vs->conf.num_queues;
@@ -101,15 +101,23 @@ static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
     if (ret < 0) {
         error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
                    strerror(-ret));
-        vhost_user_cleanup(&s->vhost_user);
-        g_free(vqs);
-        return;
+        goto free_vhost;
     }
 
     /* Channel and lun both are 0 for bootable vhost-user-scsi disk */
     vsc->channel = 0;
     vsc->lun = 0;
     vsc->target = vs->conf.boot_tpgt;
+
+    return;
+
+free_vhost:
+    vhost_user_cleanup(&s->vhost_user);
+    g_free(vqs);
+free_virtio:
+    err = NULL;
+    virtio_scsi_common_unrealize(dev, &err);
+    error_propagate(errp, err);
 }
 
 static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
-- 
2.21.0