x86, irq, SFI: Release IOAPIC pin when PCI device is disabled

Release IOAPIC pin associated with PCI device when the PCI device
is disabled.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1402302011-23642-41-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index 337d165c64f1..09fece368592 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -227,6 +227,12 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
         return 0;
 }
 
+static void intel_mid_pci_irq_disable(struct pci_dev *dev)
+{
+        if (dev->irq > 0)
+                mp_unmap_irq(dev->irq);
+}
+
 struct pci_ops intel_mid_pci_ops = {
         .read = pci_read,
         .write = pci_write,
@@ -243,6 +249,7 @@ int __init intel_mid_pci_init(void)
         pr_info("Intel MID platform detected, using MID PCI ops\n");
         pci_mmcfg_late_init();
         pcibios_enable_irq = intel_mid_pci_irq_enable;
+        pcibios_disable_irq = intel_mid_pci_irq_disable;
         pci_root_ops = intel_mid_pci_ops;
         pci_soc_mode = 1;
         /* Continue with standard init */