Re: [PATCH 2/7] usb: xhci: Check endpoint is valid before dereferencing it

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By the way, i used this patch on linux kernel has been a year,
https://lore.kernel.org/all/6908aa69-469b-8f92-8e19-60685f524f9c@xxxxxxxxxxxx/

2023-02-24 23:58 GMT+08:00, youling 257 <youling257@xxxxxxxxx>:
> February 17, when i used linux 6.2-rc8, happen "Abort failed to stop
> command ring: -110", google search history February 17 search "Abort
> failed to stop command ring: -110" and "Usbreset No such device
> found".
>
> Date: Fri, 17 Feb 2023 23:59:29 +0800
> Subject: [PATCH] Revert "usb: xhci: Check endpoint is valid before
> dereferencing it"
> This reverts commit e8fb5bc76eb86437ab87002d4a36d6da02165654.
>
> a week never see usb not work.
> may be revert it fix my problem.
>
> 2023-02-24 18:29 GMT+08:00, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>:
>> On 23.2.2023 18.26, youling257 wrote:
>>> I used type-c 20Gbps USB3.2 GEN2x2 PCIe Expansion Card, may be this
>>> patch
>>> cause USB3.2 GEN2x2 PCIe Expansion Card not work.
>>>
>>> [    0.285088] xhci_hcd 0000:09:00.0: hcc params 0x0200ef80 hci version
>>> 0x110 quirks 0x0000000000800010
>>> [    0.285334] usb usb7: We don't know the algorithms for LPM for this
>>> host, disabling LPM.
>>> [    0.285347] xhci_hcd 0000:09:00.0: xHCI Host Controller
>>> [    0.285407] hub 7-0:1.0: USB hub found
>>> [    0.285415] hub 7-0:1.0: 4 ports detected
>>> [    0.285783] xhci_hcd 0000:09:00.0: new USB bus registered, assigned
>>> bus
>>> number 8
>>> [    0.285787] xhci_hcd 0000:09:00.0: Host supports USB 3.2 Enhanced
>>> SuperSpeed
>>> [    0.285889] hub 4-0:1.0: USB hub found
>>> [    0.285901] hub 4-0:1.0: 1 port detected
>>> [    0.285988] usb usb8: We don't know the algorithms for LPM for this
>>> host, disabling LPM.
>>> [ 3277.156054] xhci_hcd 0000:09:00.0: Abort failed to stop command ring:
>>> -110
>>> [ 3277.156091] xhci_hcd 0000:09:00.0: xHCI host controller not
>>> responding,
>>> assume dead
>>> [ 3277.156103] xhci_hcd 0000:09:00.0: HC died; cleaning up
>>>
>>> may be this patch cause "xhci_hcd 0000:09:00.0: HC died; cleaning up"
>>> problem.
>>
>> Unlikely, this patch only touches code called after HC already died.
>>
>> Does reverting this patch fix the issue?
>>
>> Thanks
>> Mathias
>>
>



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