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

[Kai-Heng Feng]

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
> >>
>