[dpdk-dev] [PATCH v2] drivers/i40e: fix link update no wait

[Lu, Wenzhuo]

Hi,


> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Fan Zhang
> Sent: Thursday, March 8, 2018 8:18 PM
> To: dev at dpdk.org
> Cc: Glynn, Michael J <michael.j.glynn at intel.com>; Zhang, Roy Fan
> <roy.fan.zhang at intel.com>; stable at dpdk.org; Zhang, Helin
> <helin.zhang at intel.com>; Liang, Cunming <cunming.liang at intel.com>;
> Chilikin, Andrey <andrey.chilikin at intel.com>
> Subject: [dpdk-dev] [PATCH v2] drivers/i40e: fix link update no wait
> 
> Fixes: 263333bbb7a9 ("i40e: fix link status timeout")
> Cc: cunming.liang at intel.com
> Cc: stable at dpdk.org
> 
> In i40e_dev_link_update() the driver obtains the link status info via admin
> queue command despite of "no_wait" flag. This requires relatively long time
> and may be a problem to some application such as ovs-dpdk
> (https://bugzilla.redhat.com/show_bug.cgi?id=1551761).
> 
> This patch aims to fix the problem by using a different approach of obtaining
> link status for i40e NIC without waiting.
> Instead of getting the link status via admin queue command, this patch
> reads the link status registers to accelerate the procedure.
> 
> Signed-off-by: Fan Zhang <roy.fan.zhang at intel.com>
> Signed-off-by: Andrey Chilikin <andrey.chilikin at intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu at intel.com>