linux-kernel - Re: [PATCH v2 1/2] PCI/portdrv: Add necessary wait for disabling hotplug events

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Message-ID: <a7ebd733-3fdd-4163-8fd4-9f70ee40c6be@web.de>
Date: Tue, 18 Feb 2025 10:00:33 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Feng Tang <feng.tang@...ux.alibaba.com>, linux-pci@...r.kernel.org,
 Bjorn Helgaas <bhelgaas@...gle.com>,
 Guanghui Feng <guanghuifeng@...ux.alibaba.com>,
 Liguang Zhang <zhangliguang@...ux.alibaba.com>,
 Lukas Wunner <lukas@...ner.de>, "Rafael J. Wysocki" <rafael@...nel.org>,
 Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v2 1/2] PCI/portdrv: Add necessary wait for disabling
 hotplug events

> There was problem reported by firmware developers that they received
> 2 pcie link control commands in very short intervals on an ARM server,
> which doesn't comply with pcie spec, and broke their state machine and
> work flow. According to PCIe 6.1 spec, section 6.7.3.2, software needs

Would you like to use key words in consistent ways also in such a change description?

> to wait at least 1 second for the command-complete event, before
> resending the cmd or …

                command?

…
> ---
> Changlog:
>
>   since v1:
…

Are cover letters generally desirable for patch series?

Regards,
Markus