Release IOAPIC pin associated with PCI device when the PCI device
is disabled.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
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 55acf55b41e7..f6559942952d 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 struct irq_domain *mp_ioapic_create_irqdomain(int ioapic, void *arg)
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
--
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