[RFC 0/4] Introduce a mechanism to allocate PCI IRQ on demand

[Jiang Liu <jiang.liu@linux.intel.com>]

This patch set introduces a mechanism to allocate PCI IRQ on demand and
free it when not used anymore by hooking pci_device_probe() and
pci_device_remove().

It will be used to track IOAPIC pin usage on x86 so we could support
IOAPIC hot-removal.

The patch set passes Fengguang's 0day test suite and is available at:
https://github.com/jiangliu/linux.git pci_irq_v1

Thanks!
Gerry

Jiang Liu (4):
  PCI: Add hooks to allocate/free IRQ resources when binding/unbinding
    driver
  PCI, MSI: Optionally free legacy PCI IRQ when enabling MSI/MSI-X
  PCI, x86: Allocate PCI IRQ on demand and free it when not used
    anymore
  PCI: Introduce helpers to manage pci_dev->irq and
    pci_dev->irq_managed

 arch/x86/include/asm/pci_x86.h |    2 --
 arch/x86/pci/common.c          |   20 +++++++++-----------
 arch/x86/pci/intel_mid_pci.c   |    9 ++++++---
 arch/x86/pci/irq.c             |   23 ++++-------------------
 drivers/acpi/pci_irq.c         |   17 ++++-------------
 drivers/pci/msi.c              |    6 +++++-
 drivers/pci/pci-driver.c       |   33 +++++++++++++++++++++++----------
 include/linux/pci.h            |   19 +++++++++++++++++++
 8 files changed, 70 insertions(+), 59 deletions(-)

-- 
1.7.10.4