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Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command

From Mathias Nyman <mathias.nyman@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command
Date 2017-01-02 16:00 +0100
Message-ID <sVcfD-8dX-17@gated-at.bofh.it> (permalink)
References (12 earlier) <sQnbI-2wp-43@gated-at.bofh.it> <sQumR-7fK-1@gated-at.bofh.it> <sQEPf-5GI-9@gated-at.bofh.it> <sQOOD-3SW-55@gated-at.bofh.it> <sSQjf-4Vj-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 27.12.2016 05:07, Baolin Wang wrote:
> Hi,
>
> On 21 December 2016 at 21:00, Mathias Nyman
> <mathias.nyman@linux.intel.com> wrote:
>> On 21.12.2016 04:22, Baolin Wang wrote:
>>>
>>> Hi Mathias,
>>>
>>> On 20 December 2016 at 23:13, Mathias Nyman
>>> <mathias.nyman@linux.intel.com> wrote:
>>>>
>>>> On 20.12.2016 09:30, Baolin Wang wrote:
>>>> ...
>>>>
>>>> Alright, I gathered all current work related to xhci races and timeouts
>>>> and put them into a branch:
>>>>
>>>> git://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git
>>>> timeout_race_fixes
>>>>
>>>> Its based on 4.9
>>>> It includes a few other patches just to avoid conflicts and  make my life
>>>> easier
>>>>
>>>> Interesting patches are:
>>>>
>>>> ee4eb91 xhci: remove unnecessary check for pending timer
>>>> 0cba67d xhci: detect stop endpoint race using pending timer instead of
>>>> counter.
>>>> 4f2535f xhci: Handle command completion and timeout race
>>>> b9d00d7 usb: host: xhci: Fix possible wild pointer when handling abort
>>>> command
>>>> 529a5a0 usb: xhci: fix possible wild pointer
>>>> 4766555 xhci: Fix race related to abort operation
>>>> de834a3 xhci: Use delayed_work instead of timer for command timeout
>>>> 69973b8 Linux 4.9
>>>>
>>>> The fixes for command queue races will go to usb-linus and stable, the
>>>> reworks for stop ep watchdog timer will go to usb-next.
>>>
>>>
>>> How about applying below patch in your 'timeout_race_fixes' branch?
>>> [PATCH] usb: host: xhci: Clean up commands when stop endpoint command is
>>> timeout
>>> https://lkml.org/lkml/2016/12/13/94
>>>
>>
>> usb_hc_died() should eventyally end up calling xhci_mem_cleanup()
>> which will cleanup the command queue. But I need to look into that
>
> usb_hc_died() did not call xhci_mem_cleanup() to clean up command
> queue, it just disconnects all children devices attached on the dying
> hub. I did not find where it will clean up the command queue when
> issuing usb_hc_died(). Also before issuing usb_hc_died() in
> xhci_handle_command_timeout(), we will call
> xhci_cleanup_command_queue(). I think it should same as in
> xhci_stop_endpoint_command_watchdog().
>

You're right, it doesn't call xhci_mem_cleanup.
Need to look at this after getting first series of fixes to usb-linus

-Mathias

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Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-12 17:00 +0100
  Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-13 04:30 +0100
    Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-19 11:40 +0100
      Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-19 12:40 +0100
        Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@intel.com> - 2016-12-19 13:20 +0100
          Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-20 04:30 +0100
          Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-20 05:30 +0100
            Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-20 07:10 +0100
              Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-20 07:50 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-20 07:50 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-20 08:20 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-20 08:40 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-20 16:20 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-21 03:30 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-21 14:10 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2016-12-27 04:10 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2017-01-02 16:00 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Baolin Wang <baolin.wang@linaro.org> - 2017-01-03 07:30 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-21 07:20 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-21 13:50 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> - 2016-12-21 15:40 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-21 16:10 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> - 2016-12-21 16:20 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-22 02:50 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-23 14:00 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-22 02:50 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-21 08:00 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-12-21 14:00 +0100
                Re: [PATCH 2/2] usb: host: xhci: Handle the right timeout command Lu Baolu <baolu.lu@linux.intel.com> - 2016-12-22 02:50 +0100

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