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authorMohsin Kazmi <sykazmi@cisco.com>2020-02-27 11:49:21 +0100
committerDamjan Marion <dmarion@me.com>2020-03-21 11:36:04 +0000
commit7f6d145accc6e63b150ab4efc282f19cbe996b57 (patch)
treef42aabeff91bea82bea911f3c651b5d3075833fd /src/vnet/devices/virtio/virtio.c
parent76c6159d83c2dfe29f84dc4b05d399cdbbdf2878 (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>
Diffstat (limited to 'src/vnet/devices/virtio/virtio.c')
-rw-r--r--src/vnet/devices/virtio/virtio.c5
1 files changed, 5 insertions, 0 deletions
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);