Re: [dpdk-dev] [PATCH v2] pmd/virtio: fix cannot start virtio dev after stop

[Pavel Fedin <p.fedin@samsung.com>]

 Tested-by: Pavel Fedin <p.fedin@samsung.com>

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia


> -----Original Message-----
> From: Jianfeng Tan [mailto:jianfeng.tan@intel.com]
> Sent: Monday, January 11, 2016 9:16 AM
> To: dev@dpdk.org
> Cc: p.fedin@samsung.com; yuanhan.liu@linux.intel.com; Jianfeng Tan
> Subject: [PATCH v2] pmd/virtio: fix cannot start virtio dev after stop
> 
> v2 changes:
>     - Address compiling error.
>     - Add Reported-by.
> 
> Fix the issue that virtio device cannot be started after stopped.
> 
> The field, hw->started, should be changed by virtio_dev_start/stop instead
> of virtio_dev_close.
> 
> Reported-by: Pavel Fedin <p.fedin@samsung.com>
> Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> 
> ---
>  drivers/net/virtio/virtio_ethdev.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index d928339..5bdd305 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -490,11 +490,13 @@ virtio_dev_close(struct rte_eth_dev *dev)
> 
>  	PMD_INIT_LOG(DEBUG, "virtio_dev_close");
> 
> +	if (hw->started == 1)
> +		virtio_dev_stop(dev);
> +
>  	/* reset the NIC */
>  	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
>  		vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
>  	vtpci_reset(hw);
> -	hw->started = 0;
>  	virtio_dev_free_mbufs(dev);
>  	virtio_free_queues(dev);
>  }
> @@ -1408,10 +1410,9 @@ eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
>  	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
>  		return -EPERM;
> 
> -	if (hw->started == 1) {
> -		virtio_dev_stop(eth_dev);
> -		virtio_dev_close(eth_dev);
> -	}
> +	/* Close it anyway since there's no way to know if closed */
> +	virtio_dev_close(eth_dev);
> +
>  	pci_dev = eth_dev->pci_dev;
> 
>  	eth_dev->dev_ops = NULL;
> @@ -1612,9 +1613,12 @@ static void
>  virtio_dev_stop(struct rte_eth_dev *dev)
>  {
>  	struct rte_eth_link link;
> +	struct virtio_hw *hw = dev->data->dev_private;
> 
>  	PMD_INIT_LOG(DEBUG, "stop");
> 
> +	hw->started = 0;
> +
>  	if (dev->data->dev_conf.intr_conf.lsc)
>  		rte_intr_disable(&dev->pci_dev->intr_handle);
> 
> --
> 2.1.4