[dpdk-stable] [dpdk-dev] [PATCH v2] net/e1000: fix link status update

[Ye Xiaolong]

On 11/18, Cui, LunyuanX wrote:
>Hi, Xiaolong
>
>> -----Original Message-----
>> From: Ye, Xiaolong
>> Sent: Monday, November 18, 2019 11:07 AM
>> To: Cui, LunyuanX <lunyuanx.cui at intel.com>
>> Cc: dev at dpdk.org; Lu, Wenzhuo <wenzhuo.lu at intel.com>;
>> stable at dpdk.org
>> Subject: Re: [dpdk-dev] [PATCH v2] net/e1000: fix link status update
>> 
>> On 11/15, Lunyuan Cui wrote:
>> >Unassigned variable should not be used as judgment, and there is no
>> >need to update link status according to old link status.
>> >This patch fix the issue.
>> >
>> >Fixes: 80ba61115e77 ("net/e1000: use link status helper functions")
>> >Cc: stable at dpdk.org
>> >
>> >Signed-off-by: Lunyuan Cui <lunyuanx.cui at intel.com>
>> >---
>> > drivers/net/e1000/em_ethdev.c | 4 ++--
>> > 1 file changed, 2 insertions(+), 2 deletions(-)
>> >
>> >diff --git a/drivers/net/e1000/em_ethdev.c
>> >b/drivers/net/e1000/em_ethdev.c index 9a88b50b2..7959ee4e9 100644
>> >--- a/drivers/net/e1000/em_ethdev.c
>> >+++ b/drivers/net/e1000/em_ethdev.c
>> >@@ -1157,7 +1157,7 @@ eth_em_link_update(struct rte_eth_dev *dev,
>> int wait_to_complete)
>> > 	memset(&link, 0, sizeof(link));
>> >
>> > 	/* Now we check if a transition has happened */
>> >-	if (link_check && (link.link_status == ETH_LINK_DOWN)) {
>> >+	if (link_check) {
>> > 		uint16_t duplex, speed;
>> > 		hw->mac.ops.get_link_up_info(hw, &speed, &duplex);
>> > 		link.link_duplex = (duplex == FULL_DUPLEX) ?
>> >@@ -1167,7 +1167,7 @@ eth_em_link_update(struct rte_eth_dev *dev,
>> int wait_to_complete)
>> > 		link.link_status = ETH_LINK_UP;
>> > 		link.link_autoneg = !(dev->data->dev_conf.link_speeds &
>> > 				ETH_LINK_SPEED_FIXED);
>> >-	} else if (!link_check && (link.link_status == ETH_LINK_UP)) {
>> >+	} else {
>> > 		link.link_speed = ETH_SPEED_NUM_NONE;
>> > 		link.link_duplex = ETH_LINK_HALF_DUPLEX;
>> > 		link.link_status = ETH_LINK_DOWN;
>> 
>> I am a little confused about the variable link_check, is it used to indicate
>> whether there is link status change or link status up?
>
>The variable link_check is used to indicate link status up.
>When link_check is true, link status is up.
>When link_check is false, link status is down.

Then the link_check seems a bad name, could you help submit a patch to rename it?

@whenzhuo, could you help review/ack this change?

Thanks,
Xiaolong
>
>Thanks,
>Lunyuan
>