diff options
| author |   Mohsin Kazmi <sykazmi@cisco.com> | 2020-02-27 11:49:21 +0100 |
|---|---|---|
| committer | Mohsin Kazmi <sykazmi@cisco.com> | 2020-03-27 09:39:58 +0000 |
| commit | 4f81e6ffe1a89ef4ca6789966ea8ab986a40ce8f (patch) | |
| tree | 63a006b9c51ab20d21bc8e8a99a24f8fce6d13db /src/vnet/devices/virtio/virtio.c | |
| parent | 0dfc3af13bd931830ea97f966957230744324cac (diff) | |
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 <sykazmi@cisco.com>
(cherry picked from commit 7f6d145accc6e63b150ab4efc282f19cbe996b57)
Diffstat (limited to 'src/vnet/devices/virtio/virtio.c')
| -rw-r--r-- | src/vnet/devices/virtio/virtio.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio.c b/src/vnet/devices/virtio/virtio.c index c0c163fc850..0f5e441df64 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); |