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From: Sinan Kaya <>
To: Lukas Wunner <>, Bjorn Helgaas <>
Cc: Mika Westerberg <>,
	Yehezkel Bernat <>,
	Michael Jamet <>,
Subject: Re: Regression (sort of): PCI/portdrv: Turn off PCIe services during shutdown
Date: Fri, 12 Jan 2018 09:26:48 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Lukas,

On 1/12/2018 5:49 AM, Lukas Wunner wrote:
> Hi Sinan,
> I updated to 4.15 this week and noticed a regression (if one may call it
> that, it's more like a very noticeable annoyance) affecting machines
> with Thunderbolt controllers wherein a reboot or shutdown is delayed by
> 8 seconds, caused by

Sorry for that.

I wonder if we can separate remove from shutdown and just disable the IRQs
in shutdown case rather than turning off the slot power etc.

Let me see if I can come up with a quick patch.

> On the one hand, your commit message sounds as though the change merely
> addresses a *potential* issue, so one could argue that if it causes
> *real* issues such as delayed reboots, it's probably not a good idea.
> On the other hand I do see your point since a user might surprise-remove
> a device from a hotplug slot during shutdown, and we clearly wouldn't want
> to act on that.

We are seeing the problem on our platform (QDF2400). It is just sporadic. 
That's why, the commit message was loosely worded.


Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

  parent reply	other threads:[~2018-01-12 14:26 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-12 10:49 Lukas Wunner
2018-01-12 11:03 ` Lukas Wunner
2018-01-12 14:26 ` Sinan Kaya [this message]
2018-01-12 15:12   ` Lukas Wunner
2018-01-12 15:31     ` Sinan Kaya
2018-01-13  7:32       ` Lukas Wunner
2018-01-13 17:58         ` okaya
2018-01-13 19:39           ` Lukas Wunner
2018-01-13 20:49             ` okaya
2018-01-12 16:34 ` Mika Westerberg
2018-01-13  7:14   ` Lukas Wunner

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