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| author | yinyin <yin.yin@cs2c.com.cn> | 2013-08-22 14:47:16 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2013-08-25 12:52:33 +0300 |
| commit | 1ae2757c6c4525c9b42f408c86818f843bad7418 (patch) | |
| tree | aaf13092d5ba2016067e4423dfe93ee8b0038b38 /hw/virtio | |
| parent | 1e0995561959645e218bb5e4afb6ad3d47b33396 (diff) | |
| download | qemu-1ae2757c6c4525c9b42f408c86818f843bad7418.tar.gz | |
virtio: virtqueue_get_avail_bytes: fix desc_pa when loop over the indirect descriptor table
virtqueue_get_avail_bytes: when found a indirect desc, we need loop over it.
/* loop over the indirect descriptor table */
indirect = 1;
max = vring_desc_len(desc_pa, i) / sizeof(VRingDesc);
num_bufs = i = 0;
desc_pa = vring_desc_addr(desc_pa, i);
But, It init i to 0, then use i to update desc_pa. so we will always get:
desc_pa = vring_desc_addr(desc_pa, 0);
the last two line should swap.
Cc: qemu-stable@nongnu.org
Signed-off-by: Yin Yin <yin.yin@cs2c.com.cn>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/virtio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index f03c45dff5..2f1e73bc75 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -377,8 +377,8 @@ void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, /* loop over the indirect descriptor table */ indirect = 1; max = vring_desc_len(desc_pa, i) / sizeof(VRingDesc); - num_bufs = i = 0; desc_pa = vring_desc_addr(desc_pa, i); + num_bufs = i = 0; } do { |