linux-kernel - Re: [PATCH] PCI: pciehp: clear cmd_busy bit when Command Completed in polling mode

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Message-ID: <e5cb4305-5fdd-88b6-8c1e-27b4ca8b8c39@linux.alibaba.com>
Date:   Fri, 26 Nov 2021 15:47:30 +0800
From:   luanshi <zhangliguang@...ux.alibaba.com>
To:     Lukas Wunner <lukas@...ner.de>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Amey Narkhede <ameynarkhede03@...il.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: pciehp: clear cmd_busy bit when Command Completed in
 polling mode

Sorry for the late reply, the machine is occupied by someone else.

For detailed information:

https://bugzilla.kernel.org/show_bug.cgi?id=215143


Thanks,

Liguang

在 2021/11/21 14:35, Lukas Wunner 写道:
> On Sun, Nov 21, 2021 at 09:50:38AM +0800, luanshi wrote:
>> 2021/11/19 20:00, Lukas Wunner:
>>> Please open a bug on bugzilla.kernel.org and attach full output
>>> of lspci -vv and dmesg.  Be sure to add the following to the
>>> command line:
>>>     pciehp.pciehp_debug=1 dyndbg="file pciehp* +p"
>>>
>>> Once you've done that, please report the bugzilla link here
>>> so that we can analyze the issue properly.
> I really need you to perform the above steps in order to analyze
> what's going on here.
>
> Again, if you get such timeout messages, it's usually not caused
> by a bug in the driver but by an erratum in the hardware,
> i.e. the hardware neglected to signal Command Completed in response
> to a Slot Control register write.
>
> Thanks,
>
> Lukas