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Message-ID: <CANEJEGuVPfdteBfY_LyQ+D=t4HGHLvDut-Vj2xFjRM4e8kgh=Q@mail.gmail.com>
Date: Sat, 10 Feb 2024 10:20:39 -0800
From: Grant Grundler <grundler@...gle.com>
To: Christian Hewitt <christianshewitt@...il.com>
Cc: "David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Grant Grundler <grundler@...omium.org>, linux-usb@...r.kernel.org, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] net: asix: add 0b95:1790 to AX88179A device list

On Mon, Feb 5, 2024 at 2:40 AM Christian Hewitt
<christianshewitt@...il.com> wrote:
>
> Add a generic AX88179A entry for the 0b95:1790 device id:
>
> kernel: usb 2-1: New USB device found, idVendor=0b95, idProduct=1790, bcdDevice= 2.00
> kernel: usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> kernel: usb 2-1: Product: AX88179A
> kernel: usb 2-1: Manufacturer: ASIX
> kernel: usb 2-1: SerialNumber: 00D24DC0
> kernel: asix 2-1:1.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -32
> kernel: asix: probe of 2-1:1.0 failed with error -32
> kernel: ax88179_178a 2-1:1.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0040: -32
> kernel: ax88179_178a 2-1:1.0 eth1: register 'ax88179_178a' at usb-0000:01:00.0-1, ASIX AX88179 USB 3.0 Gigabit Ethernet, 20:7b:d2:d2:4d:c0
>
> Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
> ---
> The change is tested by a LibreELEC (distro) user who reports the NIC to be working
> fine (and logs support this) but the "Failed to read reg index 0x0000: -32" errors
> suggest ax88178_info might not be the correct choice. I'm not a serious coder so I
> need to "ask the audience" for suggestions on what more might be needed?
>
>  drivers/net/usb/asix_devices.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
> index f7cff58fe044..9a7b1136cd98 100644
> --- a/drivers/net/usb/asix_devices.c
> +++ b/drivers/net/usb/asix_devices.c
> @@ -1506,6 +1506,10 @@ static const struct usb_device_id        products [] = {
>         // ASIX AX88178 10/100/1000
>         USB_DEVICE (0x0b95, 0x1780),
>         .driver_info = (unsigned long) &ax88178_info,
> +}, {
> +       // ASIX AX88179A 10/100/1000
> +       USB_DEVICE(0x0b95, 0x1790),
> +       .driver_info = (unsigned long)&ax88178_info,
>  }, {

Hi Christian!
Seems like there are two problems here:
1) The USB output is telling you this device is a AX88179A : the
changes most likely should be in ax88179_178a.c using the
ax881798_info:
   https://elixir.bootlin.com/linux/latest/source/drivers/net/usb/ax88179_178a.c#L1690

2) What Andrew Lunn said. I'll add the asix driver should not be
probing (or claiming) this device - or at least be quiet about it when
it does.

Thanks for looking into this!

cheers,
grant

>         // Logitec LAN-GTJ/U2A
>         USB_DEVICE (0x0789, 0x0160),
> --
> 2.34.1
>

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