Re: [dpdk-dev] [PATCH] i40e: fix of PF interrupt handling

["Chen, Jing D" <jing.d.chen@intel.com>]

> -----Original Message-----
> From: Zhang, Helin
> Sent: Tuesday, November 04, 2014 4:08 PM
> To: dev@dpdk.org
> Cc: Cao, Waterman; Cao, Min; Xu, HuilongX; Chen, Jing D; Zhang, Helin
> Subject: [PATCH] i40e: fix of PF interrupt handling
> 
> 'PFINT_ICR0_ENA' shouldn't be cleared in user space ISR,
> otherwise adminq interrupts might be missed during
> co-working with VF initialization.
> 
> Signed-off-by: Helin Zhang <helin.zhang@intel.com>
> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c
> b/lib/librte_pmd_i40e/i40e_ethdev.c
> index 661d146..ea10c26 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -3574,7 +3574,6 @@ i40e_dev_interrupt_delayed_handler(void *param)
>  	i40e_dev_link_update(dev, 0);
>  	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
> 
> -	I40E_WRITE_REG(hw, I40E_PFINT_ICR0_ENA,
> I40E_PFINT_ICR0_ENA_MASK);
>  	i40e_pf_enable_irq0(hw);
>  	rte_intr_enable(&(dev->pci_dev->intr_handle));
>  }
> @@ -3601,7 +3600,6 @@ i40e_dev_interrupt_handler(__rte_unused struct
> rte_intr_handle *handle,
> 
>  	/* Disable interrupt */
>  	i40e_pf_disable_irq0(hw);
> -	I40E_WRITE_REG(hw, I40E_PFINT_ICR0_ENA, 0);
> 
>  	/* read out interrupt causes */
>  	icr0 = I40E_READ_REG(hw, I40E_PFINT_ICR0);
> @@ -3663,7 +3661,6 @@ i40e_dev_interrupt_handler(__rte_unused struct
> rte_intr_handle *handle,
> 
>  done:
>  	/* Enable interrupt */
> -	I40E_WRITE_REG(hw, I40E_PFINT_ICR0_ENA,
> I40E_PFINT_ICR0_ENA_MASK);
>  	i40e_pf_enable_irq0(hw);
>  	rte_intr_enable(&(dev->pci_dev->intr_handle));
>  }
> --
> 1.8.1.4

Acked-by : Jing Chen <jing.d.chen@intel.com>