From: David Miller <davem@davemloft.net>
To: rjw@rjwysocki.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, linux-pci@vger.kernel.org,
bhelgaas@google.com, nsujir@broadcom.com, mchan@broadcom.com
Subject: Re: [PATCH] PCI / tg3: Give up chip reset and carrier loss handling if PCI device is not present
Date: Mon, 02 Dec 2013 16:02:19 -0500 (EST) [thread overview]
Message-ID: <20131202.160219.837472723344445995.davem@davemloft.net> (raw)
In-Reply-To: <7807315.7cU9KldDtM@vostro.rjw.lan>
From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Date: Sun, 01 Dec 2013 02:34:37 +0100
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> Modify tg3_chip_reset() and tg3_close() to check if the PCI network
> adapter device is accessible at all in order to skip poking it or
> trying to handle a carrier loss in vain when that's not the case.
> Introduce a special PCI helper function pci_device_is_present()
> for this purpose.
>
> Of course, this uncovers the lack of the appropriate RTNL locking
> in tg3_suspend() and tg3_resume(), so add that locking in there
> too.
>
> These changes prevent tg3 from burning a CPU at 100% load level for
> solid several seconds after the Thunderbolt link is disconnected from
> a Matrox DS1 docking station.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Applied, thanks everyone.
prev parent reply other threads:[~2013-12-02 21:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-01 1:34 [PATCH] PCI / tg3: Give up chip reset and carrier loss handling if PCI device is not present Rafael J. Wysocki
2013-12-01 20:39 ` Michael Chan
2013-12-02 1:18 ` Rafael J. Wysocki
2013-12-02 18:48 ` David Miller
2013-12-02 18:54 ` Michael Chan
2013-12-02 21:02 ` David Miller [this message]
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