From 562ac2f4e4f55b6337570567eaf8f3f0def62d3f Mon Sep 17 00:00:00 2001
From: Mohsin Kazmi <sykazmi@cisco.com>
Date: Wed, 24 May 2023 11:25:39 +0000
Subject: [PATCH] virtio: fix the packet buffering initialization order
Type: fix
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Change-Id: Idada695432d2bfac8808f35f1e8cd16f84d963c6
---
src/vnet/devices/virtio/pci.c | 31 +++++++++++++++++++++----------
src/vnet/devices/virtio/virtio.c | 1 -
2 files changed, 21 insertions(+), 11 deletions(-)
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c
index cb177b3e469..85e6abdbbe5 100644
--- a/src/vnet/devices/virtio/pci.c
+++ b/src/vnet/devices/virtio/pci.c
@@ -1498,9 +1498,17 @@ virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
"error encountered during packet buffering init");
goto error;
}
+ /*
+ * packet buffering flag needs to be set 1 before calling the
+ * virtio_pre_input_node_enable but after the successful initialization
+ * of buffering queues above.
+ * Packet buffering flag set to 0 if there will be any error during
+ * buffering initialization.
+ */
+ vif->packet_buffering = 1;
+ virtio_pre_input_node_enable (vm, vif);
}
- virtio_pre_input_node_enable (vm, vif);
virtio_vring_set_rx_queues (vm, vif);
virtio_vring_set_tx_queues (vm, vif);
@@ -1542,17 +1550,19 @@ virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
vlib_pci_intr_disable (vm, vif->pci_dev_handle);
- for (i = 0; i < vif->max_queue_pairs; i++)
+ if (vif->virtio_pci_func)
{
- vif->virtio_pci_func->del_queue (vm, vif, RX_QUEUE (i));
- vif->virtio_pci_func->del_queue (vm, vif, TX_QUEUE (i));
- }
+ for (i = 0; i < vif->max_queue_pairs; i++)
+ {
+ vif->virtio_pci_func->del_queue (vm, vif, RX_QUEUE (i));
+ vif->virtio_pci_func->del_queue (vm, vif, TX_QUEUE (i));
+ }
- if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
- vif->virtio_pci_func->del_queue (vm, vif, vif->max_queue_pairs * 2);
+ if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
+ vif->virtio_pci_func->del_queue (vm, vif, vif->max_queue_pairs * 2);
- if (vif->virtio_pci_func)
- vif->virtio_pci_func->device_reset (vm, vif);
+ vif->virtio_pci_func->device_reset (vm, vif);
+ }
if (vif->hw_if_index)
{
@@ -1573,7 +1583,8 @@ virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
vlib_physmem_free (vm, vring->desc);
}
- virtio_pre_input_node_disable (vm, vif);
+ if (vif->packet_buffering)
+ virtio_pre_input_node_disable (vm, vif);
vec_foreach_index (i, vif->txq_vrings)
{
diff --git a/src/vnet/devices/virtio/virtio.c b/src/vnet/devices/virtio/virtio.c
index 33af8b8c455..2d393656b39 100644
--- a/src/vnet/devices/virtio/virtio.c
+++ b/src/vnet/devices/virtio/virtio.c
@@ -207,7 +207,6 @@ virtio_set_packet_buffering (virtio_if_t * vif, u16 buffering_size)
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
vnet_virtio_vring_t *vring;
clib_error_t *error = 0;
- vif->packet_buffering = 1;
vec_foreach (vring, vif->txq_vrings)
{
--
2.16.6