From 7f6d145accc6e63b150ab4efc282f19cbe996b57 Mon Sep 17 00:00:00 2001 From: Mohsin Kazmi Date: Thu, 27 Feb 2020 11:49:21 +0100 Subject: virtio: fix the out of order descriptors in tx Type: fix Some vhost-backends give used descriptors back in out-of-order. This patch fixes the native virtio to handle out-of-order descriptors. Change-Id: I57323303349f6a385e412ee22772ab979ae8edbf Signed-off-by: Mohsin Kazmi --- src/vnet/devices/virtio/virtio.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/vnet/devices/virtio/virtio.c') diff --git a/src/vnet/devices/virtio/virtio.c b/src/vnet/devices/virtio/virtio.c index 2b353a6a53d..d78c9114e5c 100644 --- a/src/vnet/devices/virtio/virtio.c +++ b/src/vnet/devices/virtio/virtio.c @@ -113,6 +113,11 @@ virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz) ASSERT (vring->buffers == 0); vec_validate_aligned (vring->buffers, sz, CLIB_CACHE_LINE_BYTES); + if (idx & 1) + { + clib_memset_u32 (vring->buffers, ~0, sz); + } + vring->size = sz; vring->call_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); vring->kick_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); -- cgit 1.2.3-korg