linux-kernel - Re: [RESEND PATCH v7 1/1] PCI/sysfs: Expose PCIe device serial number

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Message-ID: <20250913061720.GA1992308@rocinante>
Date: Sat, 13 Sep 2025 15:17:20 +0900
From: Krzysztof Wilczyński <kw@...ux.com>
To: Keith Busch <kbusch@...nel.org>
Cc: Matthew Wood <thepacketgeek@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mario Limonciello <superm1@...nel.org>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [RESEND PATCH v7 1/1] PCI/sysfs: Expose PCIe device serial number

Hello,

> Can we get a ruling on this one? It's pretty straight forward
> implementation exposing a useful attribute.

Who needs this?  Why is this useful?  Why hasn't there been a need for
exposing serial number in past decades, and suddenly we need it so
desperately?

We probably wouldn't want to add this if there is only a single user that
needs this, especially give that userspace tools like lspci already expose
this when someone needs it.

Also, we were reluctant to expose some types of information, like serial
numbers and such, via the VPD recently, so why exposing any serial numbers
via sysfs would be any different?

Thank you,

	Krzysztof