linux-kernel - Re: [PATCH v2] PCI: dpc: Increase pciehp waiting time for DPC recovery

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Message-ID: <c1c24812-37aa-48af-922f-2e43c659703c@zhaoxin.com>
Date: Fri, 6 Feb 2026 19:07:50 +0800
From: LeoLiu-oc <LeoLiu-oc@...oxin.com>
To: Lukas Wunner <lukas@...ner.de>
CC: Bjorn Helgaas <bhelgaas@...gle.com>, Mahesh J Salgaonkar
	<mahesh@...ux.ibm.com>, Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Oliver O'Halloran <oohall@...il.com>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<CobeChen@...oxin.com>, <ErosZhang@...oxin.com>, <TonyWWang@...oxin.com>
Subject: Re: [PATCH v2] PCI: dpc: Increase pciehp waiting time for DPC
 recovery



在 2026/2/5 16:54, Lukas Wunner 写道:
> 
> 
> [这封邮件来自外部发件人 谨防风险]
> 
> On Wed, Feb 04, 2026 at 11:55:42AM +0800, LeoLiu-oc wrote:
>> For example, The execution of the ice_pci_err_detected() in the ice network
>> card driver exceeded the maximum waiting time for DPC recovery, causing the
>> pciehp_disable_slot() to be executed which is not needed. From the user's
>> point of view, you will see that the ice network card may not be usable and
>> could even cause more serious errors, such as a kernel panic. kernel panic
>> is caused by a race between pciehp_disable_slot() and pcie_do_recovery().
>> In practice, we would observe that the ice network card is in an
>> unavailable state and a kernel panic.
> 
> Unfortunately v2 was submitted without answering all of the questions
> and testing all of the things asked for during review:
> 
> https://lore.kernel.org/all/aYBoP-B2E9fp_4YZ@wunner.de/

I have already replied to your concern in the following email. Please
pay attention to check it

https://lore.kernel.org/all/018007dd-68d9-4e16-b605-15d9c77ea13f@zhaoxin.com/

Yours sincerely,
LeoLiu-oc