From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: A question about hotplug and suspend-resume functionallity
Date: Tue, 08 Jul 2014 17:29:57 +0000 [thread overview]
Message-ID: <20140708172957.GA1797@kroah.com> (raw)
In-Reply-To: <1404838924725.18833@galilsoft.com>
On Tue, Jul 08, 2014 at 05:02:57PM +0000, Igor Bezukh wrote:
> Hi,
>
>
> We are testing Intel Gigabit adapter driver (igb) under Fedora 20, kernel 3.14.4 for the following use-case:
>
> (*) Adapter is connected to the PCIE slot
> (*) We put the system under suspend by running pm-suspend from user-space
> (*) Remove the adapter from the PCIE slot
> (*) Wake up the system
>
> Currently, we got kernel panics and the system gets stuck.
Not good, have you sent the kernel panic to the netdev@vger.kernel.org
mailing list and cc:ed the driver authors?
> My questions are -
> 1) in order to support hot-unplugging in igb driver, should I implement the check of device presence in igb_resume
> function?
>
> 2) After the system wakes up, I see in dmesg that the PCI device function igb refuses to change power state and remains in PCI power state D3.
> can I assume that after suspend-resume if the function remains in D3 and refuses to move to D1 then hot-unplug event has occured?
These questions would be best acked on the above list, the developers
there should be able to help you out.
good luck,
greg k-h
prev parent reply other threads:[~2014-07-08 17:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-08 17:02 A question about hotplug and suspend-resume functionallity Igor Bezukh
2014-07-08 17:29 ` Greg KH [this message]
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