From: Sinan Kaya <okaya@kernel.org>
To: Thierry Reding <treding@nvidia.com>, Vidya Sagar <vidyas@nvidia.com>
Cc: bhelgaas@google.com, lorenzo.pieralisi@arm.com,
jonathanh@nvidia.com, linux-tegra@vger.kernel.org,
linux-pci@vger.kernel.org, kthota@nvidia.com,
mmaddireddy@nvidia.com, sagar.tv@gmail.com
Subject: Re: [PATCH] PCI: Add CRS timeout for pci_device_is_present()
Date: Mon, 14 Oct 2019 13:21:31 -0700 [thread overview]
Message-ID: <ce411d27-5b92-8dae-fccd-73c63aa30f1c@kernel.org> (raw)
In-Reply-To: <20191014082023.GA232162@ulmo>
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On 10/14/2019 1:20 AM, Thierry Reding wrote:
> I think this makes sense, so:
>
> Reviewed-by: Thierry Reding <treding@nvidia.com>
>
> However, it looks like Sinan has researched this extensively in the past
> and gave a presentation on this at Plumbers in 2017:
>
> https://blog.linuxplumbersconf.org/2017/ocw/system/presentations/4732/original/crs.pdf
>
> Adding Sinan to see if he has any concerns about this, since resume time
> is explicitly mentioned in the above slides.
Thanks for including me. Let me catch up here.
pci_dev_wait() is supposed to handle this case via pci_pm_reset().
/**
* pci_pm_reset - Put device into PCI_D3 and back into PCI_D0.
* @dev: Device to reset.
* @probe: If set, only check if the device can be reset this way.
*/
Do you know if your execution path hits this function? We might have
missed a use case.
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next prev parent reply other threads:[~2019-10-14 20:21 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-05 18:21 [PATCH] PCI: Add CRS timeout for pci_device_is_present() Vidya Sagar
2019-10-14 8:20 ` Thierry Reding
2019-10-14 20:21 ` Sinan Kaya [this message]
2019-10-15 9:30 ` Thierry Reding
2019-10-15 11:10 ` Sinan Kaya
2019-10-15 12:14 ` Vidya Sagar
[not found] ` <afa16546-e63d-6eba-8be0-8e52339cd100@nvidia.com>
2019-10-25 11:58 ` Vidya Sagar
2019-10-26 13:59 ` Sinan Kaya
2019-11-04 11:43 ` Vidya Sagar
2019-11-04 16:52 ` Lorenzo Pieralisi
2019-11-04 17:39 ` Bjorn Helgaas
2019-11-05 10:55 ` Rafael J. Wysocki
2019-11-06 16:41 ` Bjorn Helgaas
2019-11-11 6:01 ` Vidya Sagar
2019-11-11 22:32 ` Bjorn Helgaas
2019-11-12 12:59 ` Thierry Reding
2019-11-12 14:21 ` Bjorn Helgaas
2019-11-12 17:59 ` Vidya Sagar
2019-11-12 18:58 ` Bjorn Helgaas
2019-11-13 5:39 ` Vidya Sagar
2019-11-13 11:20 ` Thierry Reding
2019-11-14 18:36 ` Bjorn Helgaas
2019-11-15 10:04 ` Vidya Sagar
2019-11-15 22:36 ` Bjorn Helgaas
2019-11-18 15:18 ` Vidya Sagar
2019-11-12 17:59 ` Vidya Sagar
2019-10-15 12:03 ` Vidya Sagar
2019-10-15 11:34 ` Vidya Sagar
2019-10-14 10:45 ` Andrew Murray
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