提交 fd5984d7 编写于 作者: L Linus Torvalds

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "One patch to avoid assigning interrupts we don't actually have on
  non-PC platforms, and two patches that addresses bugs in the new
  IOAPIC assignment code"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, irq, PCI: Keep IRQ assignment for runtime power management
  x86: irq: Fix bug in setting IOAPIC pin attributes
  x86: Fix non-PC platform kernel crash on boot due to NULL dereference
......@@ -227,6 +227,8 @@ static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned
extern void io_apic_eoi(unsigned int apic, unsigned int vector);
extern bool mp_should_keep_irq(struct device *dev);
#else /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0
......
......@@ -1070,6 +1070,11 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin,
}
if (flags & IOAPIC_MAP_ALLOC) {
/* special handling for legacy IRQs */
if (irq < nr_legacy_irqs() && info->count == 1 &&
mp_irqdomain_map(domain, irq, pin) != 0)
irq = -1;
if (irq > 0)
info->count++;
else if (info->count == 0)
......@@ -3896,6 +3901,14 @@ int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
info->polarity = 1;
}
info->node = NUMA_NO_NODE;
/*
* setup_IO_APIC_irqs() programs all legacy IRQs with default
* trigger and polarity attributes. Don't set the flag for that
* case so the first legacy IRQ user could reprogram the pin
* with real trigger and polarity attributes.
*/
if (virq >= nr_legacy_irqs() || info->count)
info->set = 1;
}
set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger,
......@@ -3946,6 +3959,18 @@ int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node)
return ret;
}
bool mp_should_keep_irq(struct device *dev)
{
if (dev->power.is_prepared)
return true;
#ifdef CONFIG_PM_RUNTIME
if (dev->power.runtime_status == RPM_SUSPENDING)
return true;
#endif
return false;
}
/* Enable IOAPIC early just for system timer */
void __init pre_init_apic_IRQ0(void)
{
......
......@@ -203,7 +203,7 @@ void __init native_init_IRQ(void)
set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
}
if (!acpi_ioapic && !of_ioapic)
if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
setup_irq(2, &irq2);
#ifdef CONFIG_X86_32
......
......@@ -68,6 +68,8 @@ static struct irqaction irq0 = {
void __init setup_default_timer_irq(void)
{
if (!nr_legacy_irqs())
return;
setup_irq(0, &irq0);
}
......
......@@ -229,7 +229,7 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
static void intel_mid_pci_irq_disable(struct pci_dev *dev)
{
if (!dev->dev.power.is_prepared && dev->irq > 0)
if (!mp_should_keep_irq(&dev->dev) && dev->irq > 0)
mp_unmap_irq(dev->irq);
}
......
......@@ -1256,7 +1256,7 @@ static int pirq_enable_irq(struct pci_dev *dev)
static void pirq_disable_irq(struct pci_dev *dev)
{
if (io_apic_assign_pci_irqs && !dev->dev.power.is_prepared &&
if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
dev->irq) {
mp_unmap_irq(dev->irq);
dev->irq = 0;
......
......@@ -484,6 +484,10 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
/* Keep IOAPIC pin configuration when suspending */
if (dev->dev.power.is_prepared)
return;
#ifdef CONFIG_PM_RUNTIME
if (dev->dev.power.runtime_status == RPM_SUSPENDING)
return;
#endif
entry = acpi_pci_irq_lookup(dev, pin);
if (!entry)
......
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