Re: [dpdk-dev] [PATCH v3 1/2] net/i40e: fix VFIO interrupt mapping in VF

["Wu, Jingjing" <jingjing.wu@intel.com>]

> -----Original Message-----
> From: Dai, Wei
> Sent: Friday, November 3, 2017 4:47 PM
> To: Wu, Jingjing <jingjing.wu@intel.com>; Xing, Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org; Dai, Wei <wei.dai@intel.com>; stable@dpdk.org
> Subject: [PATCH v3 1/2] net/i40e: fix VFIO interrupt mapping in VF
> 
> When a VF port is bound to VFIO-PIC, only miscellaneous interrupt
> is mapped to VFIO vector 0 in i40evf_dev_init( ).
> In i40evf_dev_interrupt_handle( ) and i40evf_dev_rx_queue_intr_enable( ),
> if previous VFIO interrupt mapping set in i40evf_dev_init( ) is not
> cleared, it will fail when PMD tries to map Rx queue interrupt to other
> VFIO vectors by calling rte_intr_enable( ).
> This patch clears the VFIO interrupt mappings before setting both
> miscellaneous and Rx queue interrupt mappings again to avoid failure.
> And remove the calling of rte_intr_enable( ) in
> i40evf_dev_interrupt_handler( ) as there is no need to map VFIO interrupt
> in this function repeatedly.
> 
> Fixes: 4b90a3ff26c5 ("i40evf: support Rx interrupt")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wei Dai <wei.dai@intel.com>

Acked-by: Jingjing Wu <jingjing.wu@intel.com>