Re: [PATCH v1] usb: handle warm-reset port requests on hub_init

[yangyinglu]

Hi  Kai-Heng,

I'm sorry that it took so long to reply. I found other ways to fix this 
problem. I don't need to fix this code. Thank you.


在 2023/1/11 下午3:04, Kai-Heng Feng 写道:
> Hi yangyinglu,
>
> On Wed, Jan 11, 2023 at 11:32 AM yangyinglu <yangyinglu@xxxxxxxxxxx> wrote:
> > 在 2023/1/11 上午10:33, Kai-Heng Feng 写道:
> > > Hi yangyinglu,
> > >
> > > On Tue, Jan 10, 2023 at 4:20 PM yangyinglu <yangyinglu@xxxxxxxxxxx> wrote:
> > > > USB-C storage device not detected on USB 3.0 host when
> > > > plugged in after boot, so need to warm-reset port
> > >
> > > Is it possible to enable USB dyndbg, plug a USB 3.0 device, then paste
> > > the relevant dmesg here? Thanks!
> > >
> > > Kai-Heng
> >
> >    hi,
> >       After entering the system, directly plug and unplug the USB flash
> > disk. usb control is  etron Technology Inc.The log is as follows:
> >    [   10.354484] radeon 0000:04:00.0: vgaarb: changed VGA decodes:
> > olddecodes=io+mem,decodes=none:owns=none
> >    [   10.484794] bridge: filtering via arp/ip/ip6tables is no longer
> > available by default. Update your scripts to load br_netfilter if you
> > need this.
> >    [   10.506968] tun: Universal TUN/TAP device driver, 1.6
> >    [   10.514128] virbr0: port 1(virbr0-nic) entered blocking state
> >    [   10.519858] virbr0: port 1(virbr0-nic) entered disabled state
> >    [   10.525646] device virbr0-nic entered promiscuous mode
> >    [   10.666536] virbr0: port 1(virbr0-nic) entered blocking state
> >    [   10.672268] virbr0: port 1(virbr0-nic) entered listening state
> >    [   10.748564] virbr0: port 1(virbr0-nic) entered disabled state
> >
> >    Loongnix GNU/Linux 20 Release 3 loongson-pc ttyS0
> >
> >
> >    loongson-pc login: [  147.701011] usb usb4-port1: Cannot enable. Maybe
> > the USB cable is bad?
> >    [  151.793206] usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
> >    [  151.799726] usb usb4-port1: attempt power cycle
> >    [  157.465465] usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
> >    [  161.557649] usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
> >    [  161.564167] usb usb4-port1: unable to enumerate USB device
> >    [  165.641834] usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
>
> Is it possible to enable USB dyndbg by adding kernel parameter
> "usbcore.dyndbg" so we can see the portsc?
>
> Kai-Heng
>
> > > > Signed-off-by: yangyinglu <yangyinglu@xxxxxxxxxxx>
> > > > ---
> > > >    drivers/usb/core/hub.c | 2 +-
> > > >    1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
> > > > index 77e73fc8d673..bd4496b80c2d 100644
> > > > --- a/drivers/usb/core/hub.c
> > > > +++ b/drivers/usb/core/hub.c
> > > > @@ -1159,7 +1159,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
> > > >                   }
> > > >
> > > >                   /* Make sure a warm-reset request is handled by port_event */
> > > > -               if (type == HUB_RESUME &&
> > > > +               if ((type == HUB_RESUME || type == HUB_INIT2) &&
> > > >                       hub_port_warm_reset_required(hub, port1, portstatus))
> > > >                           set_bit(port1, hub->event_bits);
> > > >
> > > > --
> > > > 2.20.1