d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

net/vhost: fix redundant queue state event

Browse Source 
In some situations, when a virtual machine is starting,
vring_state_changed can be called while there was no change in the
queue state. This fix makes sure that there was really a change in the
queue state before calling the callback for EVENT_QUEUE_STATE.

Fixes: ee584e9710 ("vhost: add driver on top of the library")
Cc: stable@dpdk.org

Signed-off-by: Noa Ezra <noae@mellanox.com>
Reviewed-by: Matan Azrad <matan@mellanox.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Noa Ezra 2019-06-20 06:33:03 +00:00 committed by Ferruh Yigit
parent 4e0de8dac8
commit f2f0577eff
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/vhost/rte_eth_vhost.c
View File

@ -853,6 +853,10 @@ vring_state_changed(int vid, uint16_t vring, int enable)
/* won't be NULL */
state = vring_states[eth_dev->data->port_id];
rte_spinlock_lock(&state->lock);
if (state->cur[vring] == enable) {
rte_spinlock_unlock(&state->lock);
return 0;
}
state->cur[vring] = enable;
state->max_vring = RTE_MAX(vring, state->max_vring);
rte_spinlock_unlock(&state->lock);