[tip:x86/apic] x86, irq, mpparse: Release IOAPIC pin when PCI device is disabled

[tip-bot for Jiang Liu]

Commit-ID:  c03b3b0738a56cf283b0d05256988d5e3c8bd719
Gitweb:     http://git.kernel.org/tip/c03b3b0738a56cf283b0d05256988d5e3c8bd719
Author:     Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
AuthorDate: Mon, 9 Jun 2014 16:20:08 +0800
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 21 Jun 2014 23:05:44 +0200

x86, irq, mpparse: 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@xxxxxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1402302011-23642-40-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/kernel/mpparse.c |  1 +
 arch/x86/pci/irq.c        | 13 +++++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index faf503a..fde86d2 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -115,6 +115,7 @@ static void __init MP_bus_info(struct mpc_bus *m)
 
 static struct irq_domain_ops mp_ioapic_irqdomain_ops = {
 	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
 };
 
 static void __init MP_ioapic_info(struct mpc_ioapic *m)
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index e4200e5..748cfe8 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -26,6 +26,7 @@ static int acer_tm360_irqrouting;
 static struct irq_routing_table *pirq_table;
 
 static int pirq_enable_irq(struct pci_dev *dev);
+static void pirq_disable_irq(struct pci_dev *dev);
 
 /*
  * Never use: 0, 1, 2 (timer, keyboard, and cascade)
@@ -53,7 +54,7 @@ struct irq_router_handler {
 };
 
 int (*pcibios_enable_irq)(struct pci_dev *dev) = pirq_enable_irq;
-void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL;
+void (*pcibios_disable_irq)(struct pci_dev *dev) = pirq_disable_irq;
 
 /*
  *  Check passed address for the PCI IRQ Routing Table signature
@@ -1186,7 +1187,7 @@ void pcibios_penalize_isa_irq(int irq, int active)
 
 static int pirq_enable_irq(struct pci_dev *dev)
 {
-	u8 pin;
+	u8 pin = 0;
 
 	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 	if (pin && !pcibios_lookup_irq(dev, 1)) {
@@ -1252,3 +1253,11 @@ static int pirq_enable_irq(struct pci_dev *dev)
 	}
 	return 0;
 }
+
+static void pirq_disable_irq(struct pci_dev *dev)
+{
+	if (io_apic_assign_pci_irqs && dev->irq) {
+		mp_unmap_irq(dev->irq);
+		dev->irq = 0;
+	}
+}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/