From: Ivaylo Dimitrov <ivo.g.dimitrov.75-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
Cc: Alan Stern
<stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>,
Felipe Balbi <balbi-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Robert Baldyga
<r.baldyga-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Andrzej Pietrasiewicz
<andrzej.p-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Michal Nazarewicz
<mina86-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
Subject: Re: USB gadgets with configfs hang reboot
Date: Tue, 26 Apr 2016 21:13:02 +0300 [thread overview]
Message-ID: <571FAFAE.3080908@gmail.com> (raw)
In-Reply-To: <20160426164918.GA5995-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
On 26.04.2016 19:49, Tony Lindgren wrote:
> * Ivaylo Dimitrov <ivo.g.dimitrov.75-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> [160426 09:46]:
>>
>>
>> On 26.04.2016 18:03, Alan Stern wrote:
>>> On Tue, 26 Apr 2016, Felipe Balbi wrote:
>>>
>>>>> Is there a reason why a process (pnatd in this particular case) doesn't
>>>>> get killed on reboot?
>>>>
>>>> there might be, and that's probably the bug we're trying to figure
>>>> out. But so far, no idea.
>>>
>>> One possible reason is that the process is in an uninterruptible wait
>>> inside the kernel, waiting for something that isn't going to happen.
>>
>> The process waits in poll(&fds, 1u, -1), where fds contains only the fd of
>> /dev/ttyGS2. Nothing suspicious I can see here.
>
> I think the easy way to reproduce this is to start getty or minicom
> on /dev/ttyG* and disconnect the USB cable.
>
At least here, it is not needed to have USB cable connected, as soon as
/dev/ttyG* is open()-ed, it is not possible to reboot/powerdown the device.
Ivo
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next prev parent reply other threads:[~2016-04-26 18:13 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 22:48 USB gadgets with configfs hang reboot Tony Lindgren
[not found] ` <20160115224839.GA19432-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-01-16 0:09 ` Tony Lindgren
2016-01-16 10:40 ` Ivaylo Dimitrov
[not found] ` <569A1E32.1020502-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-01-18 16:16 ` Tony Lindgren
2016-03-23 18:24 ` Ivaylo Dimitrov
[not found] ` <56F2DF79.6010903-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-24 6:50 ` Felipe Balbi
[not found] ` <87fuvgxtc3.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-03-24 7:03 ` Ivaylo Dimitrov
[not found] ` <56F3914B.4010206-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-24 7:11 ` Felipe Balbi
[not found] ` <87a8loxsdm.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-03-24 18:46 ` Ivaylo Dimitrov
[not found] ` <56F4361C.9040907-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-30 10:22 ` Felipe Balbi
[not found] ` <877fgkqn8c.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-03-30 13:29 ` Ivaylo Dimitrov
[not found] ` <56FBD4BF.6090905-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-30 13:38 ` Felipe Balbi
[not found] ` <87h9fohyr1.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-03-30 14:01 ` Ivaylo Dimitrov
[not found] ` <56FBDC51.9020602-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-30 14:33 ` Pali Rohár
2016-03-30 18:50 ` Ivaylo Dimitrov
[not found] ` <56FC1FD8.6090003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-30 18:54 ` Ivaylo Dimitrov
2016-03-30 19:25 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1603301509180.2194-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-03-30 19:41 ` Tony Lindgren
2016-03-31 16:32 ` Ivaylo Dimitrov
[not found] ` <56FD512C.2070108-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-31 17:00 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1603311255560.1516-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-04-01 17:02 ` Michal Nazarewicz
[not found] ` <xa1tmvpdz2h4.fsf-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
2016-04-01 19:18 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1604011452580.1957-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-04-01 22:16 ` Michal Nazarewicz
[not found] ` <xa1tbn5tynyp.fsf-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
2016-04-02 14:55 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1604021031030.19366-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-04-04 12:57 ` Michal Nazarewicz
[not found] ` <xa1ty48tilai.fsf-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
2016-04-04 15:04 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1604041038510.1704-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-04-04 18:18 ` Michal Nazarewicz
[not found] ` <xa1ttwjhi6fo.fsf-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
2016-04-04 19:37 ` Alan Stern
2016-04-04 16:18 ` Ivaylo Dimitrov
[not found] ` <570293E8.2060406-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-04 18:48 ` Michal Nazarewicz
2016-04-05 15:18 ` Michal Nazarewicz
2016-04-04 4:45 ` Felipe Balbi
2016-04-04 4:41 ` Felipe Balbi
2016-04-08 20:13 ` Ivaylo Dimitrov
[not found] ` <57081105.2050206-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-18 7:02 ` Ivaylo Dimitrov
[not found] ` <571486A1.2060006-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-05-06 12:32 ` Pali Rohár
2016-04-18 7:55 ` Felipe Balbi
[not found] ` <87oa97gxkw.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-04-25 19:00 ` Ivaylo Dimitrov
[not found] ` <571E6943.30305-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-26 6:22 ` Felipe Balbi
[not found] ` <87a8kgrisz.fsf-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-04-26 15:03 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1604261102000.2038-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-04-26 16:44 ` Ivaylo Dimitrov
[not found] ` <571F9AD4.8010900-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-26 16:49 ` Tony Lindgren
[not found] ` <20160426164918.GA5995-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-04-26 18:13 ` Ivaylo Dimitrov [this message]
2016-01-22 10:35 ` Andrzej Pietrasiewicz
[not found] ` <56A205E4.6050305-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2016-01-22 18:28 ` Tony Lindgren
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