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: NYin Yin <yin.yin@cs2c.com.cn> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> (cherry picked from commit 1ae2757c) Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
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