linux-kernel - [Patch V4 40/42] x86, irq, SFI: release IOAPIC pin when PCI device is disabled

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Date:	Mon,  9 Jun 2014 16:20:09 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Grant Likely <grant.likely@...aro.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>, x86@...nel.org
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: [Patch V4 40/42] 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@...ux.intel.com>
---
 arch/x86/pci/intel_mid_pci.c |    7 +++++++
 1 file changed, 7 insertions(+)

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 */
-- 
1.7.10.4

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