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

  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.

Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
---
 drivers/net/virtio/virtio_ethdev.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
  

On Tue, Jan 05, 2016 at 09:07:42AM +0800, Jianfeng Tan wrote:
> 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.
> 
> Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>

Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>

BTW, if I'm not mistaken, it's an issue reported from Pavel. If so,
you should add following above your Signed-off-by.

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

Note that if you send v2, you can carry my ACK, as you just do
trivial changes.

	--yliu
  

Hello!

 I tried to apply your patch to master and got compile errors. See inline.

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Jianfeng Tan
> Sent: Tuesday, January 05, 2016 4:08 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] pmd/virtio: fix cannot start virtio dev after stop
> 
> 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.
> 
> Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
> ---
>  drivers/net/virtio/virtio_ethdev.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index d928339..07fe271 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(eth_dev);
> +

 'dev', but not 'eth_dev' here.

>  	/* 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;
> @@ -1615,6 +1616,8 @@ virtio_dev_stop(struct rte_eth_dev *dev)
> 
>  	PMD_INIT_LOG(DEBUG, "stop");
> 
> +	hw->started = 0;
> +

 'hw' is not declared in this function, you have to add it.

>  	if (dev->data->dev_conf.intr_conf.lsc)
>  		rte_intr_disable(&dev->pci_dev->intr_handle);
> 
> --
> 2.1.4

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