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PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()

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To support IOAPIC hotplug, we need to allocate PCI IRQ resources on demand
and free them when not used anymore.

Implement pcibios_alloc_irq() and pcibios_free_irq() to dynamically
allocate and free PCI IRQs.

Remove mp_should_keep_irq(), which is no longer used.

[bhelgaas: changelog]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu
2015-06-10 16:54:59 +08:00
committed by Bjorn Helgaas
parent 890e484758
commit 991de2e590
5 changed files with 16 additions and 37 deletions
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7
arch/x86/pci/intel_mid_pci.c
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@@ -234,10 +234,13 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
static void intel_mid_pci_irq_disable(struct pci_dev *dev)
{
if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed &&
dev->irq > 0) {
if (dev->irq_managed && dev->irq > 0) {
mp_unmap_irq(dev->irq);
dev->irq_managed = 0;
/*
* Don't reset dev->irq here, otherwise
* intel_mid_pci_irq_enable() will fail on next call.
*/
}
}