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SubjectRe: [PATCH v1] usb: handle warm-reset port requests on hub_init
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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@loongson.cn> 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@loongson.cn> 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@loongson.cn>
>>>> ---
>>>> 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
>>>>
>>

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