[Patch V4 39/42] x86, irq, mpparse: release IOAPIC pin when PCI device is disabled

Jiang Liu
2014-06-09T08:20:08Z

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

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
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 faf503aa3b70..fde86d2b79f8 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 e4200e5e775e..748cfe8ab322 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;
+ }
+}
--
1.7.10.4