linux-kernel - [PATCH v2 0/2] PCI: Avoid capability searches in save/restore state

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Message-Id: <20250215000301.175097-1-helgaas@kernel.org>
Date: Fri, 14 Feb 2025 18:02:59 -0600
From: Bjorn Helgaas <helgaas@...nel.org>
To: linux-pci@...r.kernel.org
Cc: Alex Williamson <alex.williamson@...hat.com>,
	Christian König <ckoenig.leichtzumerken@...il.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v2 0/2] PCI: Avoid capability searches in save/restore state

From: Bjorn Helgaas <bhelgaas@...gle.com>

Reduce the number of times we search config space for PCI capabilities when
saving and restoring device state.

Bjorn Helgaas (2):
  PCI: Avoid pointless capability searches
  PCI: Cache offset of Resizable BAR capability

 drivers/pci/pci.c       | 36 +++++++++++++++++++++---------------
 drivers/pci/pci.h       |  1 +
 drivers/pci/pcie/aspm.c | 15 ++++++++-------
 drivers/pci/probe.c     |  1 +
 include/linux/pci.h     |  1 +
 5 files changed, 32 insertions(+), 22 deletions(-)

v2 changes:
  - Drop VC change that broke saving state (thanks, Ilpo)

v1: https://lore.kernel.org/r/20250208050329.1092214-1-helgaas@kernel.org

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2.34.1