linux-kernel - Re: [PATCH] net: usb: ax88179_178a: fix link status when link is set to down/up

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Date: Tue, 28 May 2024 11:18:30 +0200
From: Jose Ignacio Tornos Martinez <jtornosm@...hat.com>
To: yongqin.liu@...aro.org
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	inventor500@...aldi.net,
	jtornosm@...hat.com,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	stable@...r.kernel.org
Subject: Re: [PATCH] net: usb: ax88179_178a: fix link status when link is set to down/up

Hello Yongqin,

> When I tried the down and up operations manually from the command line,
> it worked.
> But it only worked after I ran the down and up operations after the boot.
> It fails to work by default after the boot for both the fresh deployment,
> and for the later reboot
Ok, so it works as well for you after the initialization.

> One thing I noticed is that the following message was printed twice
>     "ax88179_178a 2-3:1.0 eth0: ax88179 - Link status is: 1"
> after I ran the up operation,
>
> Is that expected?
> 
> For details, please check the log here:
> https://gist.github.com/liuyq/be8f5305d538067a344001f1d35f677b
That is another thing that I am analyzing, to clean those spurious.
But they are appearing in my case too, and I am not modifying anything at
boot time.

> The scripts are simple, here are the two scripts for Android build:
>    https://android.googlesource.com/device/linaro/dragonboard/+/refs/heads/main/shared/utils/ethaddr/ethaddr.rc
>    https://android.googlesource.com/device/linaro/dragonboard/+/refs/heads/main/shared/utils/ethaddr/set_ethaddr.sh
>
> Is the one to run the down/change mac/up operations script.
>
> Not sure why the up in the script does not work, but works when run manually.
Ok, I am not working with Android but it doesn't seem spscial, the only
doubt is when the script is executed, if the driver initialization is
complete, ...
Anyway, I will try to reproduce here and analyze it.

Best regards
José Ignacio