[dpdk-dev] [PATCH] net/virtio: fix fail to configure rxq interrupt
Tan, Jianfeng
jianfeng.tan at intel.com
Wed Jul 19 18:03:52 CEST 2017
On 7/19/2017 4:08 AM, Yuanhan Liu wrote:
> On Wed, Jul 19, 2017 at 11:18:23AM +0800, Jiayu Hu wrote:
>> When use rte_eth_dev_configure() to enable rx queue interrupt for virtio
>> devices, virtio_configure_intr() isn't called to set up the interrupt
>> environment, which causes rx queue interrupt setup failed. This patch is
>> to fix this issue.
> Hmm, how was this supposed to work in the begining when this feature
> was introduced? Jianfeng?
In the v17.05, virtio_configure_intr() will be called by
virtio_dev_configure() if the request feature is changed. That's not
correct.
>
> --yliu
>
>
>> Fixes: 26b683b4f7d0 ("net/virtio: setup Rx queue interrupts")
>> Cc: stable at dpdk.org
>>
>> Signed-off-by: Jiayu Hu <jiayu.hu at intel.com>
>> ---
>> drivers/net/virtio/virtio_ethdev.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
>> index 00a3122..66656ed 100644
>> --- a/drivers/net/virtio/virtio_ethdev.c
>> +++ b/drivers/net/virtio/virtio_ethdev.c
>> @@ -1688,6 +1688,13 @@ virtio_dev_configure(struct rte_eth_dev *dev)
>> return -ENOTSUP;
>> }
>>
>> + if (dev->data->dev_conf.intr_conf.rxq) {
>> + if (virtio_configure_intr(dev) < 0) {
>> + PMD_DRV_LOG(ERR, "failed to configure interrupt");
>> + return -ENOTSUP;
>> + }
>> + }
>> +
Hi Jiayu,
I would expect this will not work for virtio pci devices (QEMU might
crash). Could you double check that?
Thanks,
Jianfeng
>> if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
>> /* Enable vector (0) for Link State Intrerrupt */
>> if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
>> --
>> 2.7.4
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