linux-kernel - Re: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3 is enabled

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Date:   Wed, 22 Mar 2017 19:51:09 +0200
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Diego Viola <diego.viola@...il.com>
Cc:     mathias.nyman@...el.com, Roger <rogerable@...ltek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Wei WANG <wei_wang@...lsil.com.cn>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux USB List <linux-usb@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>
Subject: Re: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3
 is enabled

On 22.03.2017 00:52, Diego Viola wrote:
> On Tue, Mar 21, 2017 at 12:29 PM, Diego Viola <diego.viola@...il.com> wrote:
>> On Tue, Mar 21, 2017 at 10:04 AM, Diego Viola <diego.viola@...il.com> wrote:
>>> On Mon, Mar 20, 2017 at 8:15 PM, Diego Viola <diego.viola@...il.com> wrote:
>>>> On Mon, Mar 20, 2017 at 3:27 PM, Diego Viola <diego.viola@...il.com> wrote:
>>>>> On Mon, Mar 20, 2017 at 1:32 PM, Mathias Nyman
>>>>> <mathias.nyman@...ux.intel.com> wrote:
>>>>>> On 20.03.2017 17:39, Diego Viola wrote:
>>>>>>>
>>>>>>> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman
>>>>>>> <mathias.nyman@...ux.intel.com> wrote:
>>>>>>>>
>>>>>>>> On 19.03.2017 23:29, Diego Viola wrote:
>>>>>>>>>
>>>>>>>>>> Still a problem with 4.11.0-rc2-ARCH+
>>>>>>>>
>>>>>>>> xhci tracing can be added with:
>>>>>>>>
>>>>>>>> mount -t debugfs none /sys/kernel/debug
>>>>>>>> echo xhci-hcd >> /sys/kernel/debug/tracing/set_event
>
> Here's the log I was able to obtain today, dmesg + ftrace at the time
> of the crash:
>
> https://bugzilla.kernel.org/attachment.cgi?id=255419
>
> USB keyboard and mouse was plugged when I reproduced this.
>
> Please let me know if you need more info.
>

Thanks, I'm looking at the logs and so far the most suspicious looking entry is:

[  257.060941] rtsx_usb-254     0.... 119946155us : xhci_urb_enqueue: ep1out-bulk: urb ffff880105a93300 pipe 3221259520 length 0/12 sgs 0/0 stream 0 flags 00010000
[  257.063601] rtsx_usb-254     0.... 119946162us : xhci_urb_enqueue: ep0out-control: urb ffff880105a93300 pipe 2147484928 length 0/0 sgs 0/0 stream 0 flags 00100000

It enqueues the same URB, without ever giving it back or actually queuing any trbs for
the urb, wel,l it might just fail to enqueue it in the first place.

I need to search for a URB that has been dequeued but never given back in the trace

-Mathias