Re: [Intel-wired-lan] [PATCH] e1000e: Make speed detection on hotplugging cable more reliable

From: Paul Menzel
Date: Mon Jul 15 2019 - 04:52:24 EST

Dear Kai-Heng,

Thank you for the patch.

On 7/15/19 10:43 AM, Kai-Heng Feng wrote:
> After hotplugging an 1Gbps ethernet cable with 1Gbps link partner, the
> MII_BMSR may reports 10Mbps, renders the network rather slow.

s/may reports/may report/

> The issue has much lower fail rate after commit 59653e6497d1 ("e1000e:
> Make watchdog use delayed work"), which esssentially introduces some


> delay before running the watchdog task.
> But there's still a chance that the hotplugging event and the queued
> watchdog task gets run at the same time, then the original issue can be
> observed once again.
> So let's use mod_delayed_work() to add a deterministic 1 second delay
> before running watchdog task, after an interrupt.

I am not clear about the effects for the user. Could you elaborate
please? Does the link now come up up to one second later?

> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>

Any bug URL?

> ---
> drivers/net/ethernet/intel/e1000e/netdev.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)

Kind regards,


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