ARM: Allow PCI host drivers to be unloaded [LWN.net]

From:		Thierry Reding <thierry.reding@gmail.com>
To:		Russell King <linux@arm.linux.org.uk>, Bjorn Helgaas <bhelgaas@google.com>
Subject:		[RFC 0/3] ARM: Allow PCI host drivers to be unloaded
Date:		Tue, 13 Aug 2013 13:12:23 +0200
Message-ID:		<1376392346-14127-1-git-send-email-treding@nvidia.com>
Cc:		Stephen Warren <swarren@wwwdotorg.org>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, Jason Cooper <jason@lakedaemon.net>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Thierry Reding <treding@nvidia.com>
Archive-link:		Article, Thread

Hi,

This is a set of experimental patches that allow ARM PCI host drivers to
be unloaded. The first two patches enhance the ARM core PCI code with
functions to tear down fixed PCI I/O mappings and unregister a PCI host
bridge. The third patch uses the new functionality to allow the Tegra
PCIe driver to unbind from a device.

I'm sending this as an RFC because, while I've been able to successfully
unbind and rebind the Tegra PCIe driver and verifying that a NIC
connected via PCIe still works after each new probe, I haven't fully
investigated yet whether there may be memory leaks due to missing
cleanup.

Thierry

Thierry Reding (3):
  ARM: Allow unmapping of fixed PCI I/O mappings
  ARM: Introduce pci_common_exit()
  PCI: tegra: Support driver unbinding

 arch/arm/include/asm/io.h       |  1 +
 arch/arm/include/asm/mach/pci.h |  6 ++++++
 arch/arm/kernel/bios32.c        | 29 ++++++++++++++++++++++++++---
 arch/arm/mm/ioremap.c           |  6 ++++++
 drivers/pci/host/pci-tegra.c    | 37 ++++++++++++++++++++++++++++++++++++-
 5 files changed, 75 insertions(+), 4 deletions(-)

-- 
1.8.3.4

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