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From: <pannengyuan@huawei.com>
To: <mst@redhat.com>
Cc: liyiting@huawei.com, kuhn.chenqun@huawei.com,
	Pan Nengyuan <pannengyuan@huawei.com>,
	qemu-devel@nongnu.org, zhang.zhanghailiang@huawei.com
Subject: [PATCH v2 1/3] virtio: add ability to delete vq through a pointer
Date: Wed, 4 Dec 2019 15:31:54 +0800
Message-ID: <1575444716-17632-1-git-send-email-pannengyuan@huawei.com> (raw)

From: Pan Nengyuan <pannengyuan@huawei.com>

Devices tend to maintain vq pointers, allow deleting them trough a vq pointer.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
---
Changes v2 to v1:
- add a new function virtio_delete_queue to cleanup vq through a vq pointer
---
 hw/virtio/virtio.c         | 16 +++++++++++-----
 include/hw/virtio/virtio.h |  2 ++
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 04716b5..6de3cfd 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2330,17 +2330,23 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
     return &vdev->vq[i];
 }
 
+void virtio_delete_queue(VirtQueue *vq)
+{
+    vq->vring.num = 0;
+    vq->vring.num_default = 0;
+    vq->handle_output = NULL;
+    vq->handle_aio_output = NULL;
+    g_free(vq->used_elems);
+    vq->used_elems = NULL;
+}
+
 void virtio_del_queue(VirtIODevice *vdev, int n)
 {
     if (n < 0 || n >= VIRTIO_QUEUE_MAX) {
         abort();
     }
 
-    vdev->vq[n].vring.num = 0;
-    vdev->vq[n].vring.num_default = 0;
-    vdev->vq[n].handle_output = NULL;
-    vdev->vq[n].handle_aio_output = NULL;
-    g_free(vdev->vq[n].used_elems);
+    virtio_delete_queue(&vdev->vq[n]);
 }
 
 static void virtio_set_isr(VirtIODevice *vdev, int value)
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index c32a815..e18756d 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -183,6 +183,8 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
 
 void virtio_del_queue(VirtIODevice *vdev, int n);
 
+void virtio_delete_queue(VirtQueue *vq);
+
 void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
                     unsigned int len);
 void virtqueue_flush(VirtQueue *vq, unsigned int count);
-- 
2.7.2.windows.1




             reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04  7:31 pannengyuan [this message]
2019-12-04  7:31 ` [PATCH v2 2/3] virtio-balloon: fix memory leak while attach virtio-balloon device pannengyuan
2019-12-04 10:16   ` Laurent Vivier
2019-12-04  7:31 ` [PATCH v2 3/3] virtio-serial-bus: fix memory leak while attach virtio-serial-bus pannengyuan
2019-12-04 10:17   ` Laurent Vivier
2019-12-04 14:41   ` Eric Blake
2019-12-09 16:51   ` Michael S. Tsirkin
2019-12-04  8:33 ` [PATCH v2 1/3] virtio: add ability to delete vq through a pointer Pankaj Gupta
2019-12-05  2:30   ` Pan Nengyuan
2019-12-05  4:51     ` Pankaj Gupta
2019-12-09 15:58   ` Michael S. Tsirkin
2019-12-04  9:40 ` Laurent Vivier
2019-12-04 14:40 ` Eric Blake
2019-12-05  2:35   ` Pan Nengyuan
2019-12-05 16:45 ` Amit Shah
2019-12-06  2:17   ` Pan Nengyuan
2019-12-06  8:56     ` Amit Shah
2019-12-06  9:00       ` Pan Nengyuan
2019-12-09 16:43 ` Michael S. Tsirkin
2019-12-09 16:58   ` Michael S. Tsirkin
2019-12-10  2:08     ` Pan Nengyuan

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