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From:   Loic Poulain <loic.poulain@linaro.org>
Date:   Thu, 13 Apr 2023 19:12:20 +0200
Message-ID: <CAMZdPi98JvDdOAS9Ft6udkxZTMW57yQ4mqXMTsa1ySc4UZYqvQ@mail.gmail.com>
Subject: Re: Re: [PATCH net] wwan: core: add print for wwan port attach/disconnect
To:     Slark Xiao <slark_xiao@163.com>
Cc:     ryazanov.s.a@gmail.com, johannes@sipsolutions.net,
        davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
        pabeni@redhat.com, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
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On Thu, 13 Apr 2023 at 09:26, Slark Xiao <slark_xiao@163.com> wrote:
>
> At 2023-04-13 15:07:21, "Loic Poulain" <loic.poulain@linaro.org> wrote:
> >On Wed, 12 Apr 2023 at 13:45, Slark Xiao <slark_xiao@163.com> wrote:
> >>
> >> Refer to USB serial device or net device, there is notice to
> >> let end user know the status of device, like attached or
> >> disconnected. Add attach/disconnect print for wwan device as
> >> well. This change works for MHI device and USB device.
> >
> >This change works for wwan port devices, whatever the bus is.
> >
> Sure. Since wwan support USB device as well after integrating
> WWAN framework into cdc-wdm.
> >>
> >> Signed-off-by: Slark Xiao <slark_xiao@163.com>
> >> ---
> >>  drivers/net/wwan/wwan_core.c | 5 +++++
> >>  1 file changed, 5 insertions(+)
> >>
> >> diff --git a/drivers/net/wwan/wwan_core.c b/drivers/net/wwan/wwan_core.c
> >> index 2e1c01cf00a9..d3ac6c5b0b26 100644
> >> --- a/drivers/net/wwan/wwan_core.c
> >> +++ b/drivers/net/wwan/wwan_core.c
> >> @@ -492,6 +492,8 @@ struct wwan_port *wwan_create_port(struct device *parent,
> >>         if (err)
> >>                 goto error_put_device;
> >>
> >> +       dev_info(&wwandev->dev, "%s converter now attached to %s\n",
> >> +                wwan_port_dev_type.name, port->dev.kobj.name);
> >
> >You should use `dev_name()` instead of direct reference to kobj.
> >
> Will update this in v2.
> >Why 'converter' ? If you really want to print, it should be something like:
> >wwan0: wwan0at1 port attached
> This refer to USB device attached info:
>   696.444511] usb 2-3: GSM modem (1-port) converter now attached to ttyUSB0
> [  696.444877] usb 2-3: GSM modem (1-port) converter now attached to ttyUSB1
> [  696.445065] usb 2-3: GSM modem (1-port) converter now attached to ttyUSB2
> currently, we will print it as below with above patch:
> [  233.192123] wwan wwan0: wwan_port converter now attached to wwan0mbim0
> [  694.530781] wwan wwan0: wwan_port converter now disconnected from wwan0mbim0

Ok, but we don't have to mimic USB, and it's not a converter, keep
that simple (e.g. 'port %s attached').

Regards,
Loic