From 991de2e59090e55c65a7f59a049142e3c480f7bd Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 10 Jun 2015 16:54:59 +0800 Subject: PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq() 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 Signed-off-by: Bjorn Helgaas Acked-by: Thomas Gleixner --- arch/x86/pci/common.c | 20 +++++++++----------- arch/x86/pci/intel_mid_pci.c | 7 +++++-- arch/x86/pci/irq.c | 15 +-------------- 3 files changed, 15 insertions(+), 27 deletions(-) (limited to 'arch/x86/pci') diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 8fd6f44aee83..dc78a4a9a466 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -673,24 +673,22 @@ int pcibios_add_device(struct pci_dev *dev) return 0; } -int pcibios_enable_device(struct pci_dev *dev, int mask) +int pcibios_alloc_irq(struct pci_dev *dev) { - int err; - - if ((err = pci_enable_resources(dev, mask)) < 0) - return err; - - if (!pci_dev_msi_enabled(dev)) - return pcibios_enable_irq(dev); - return 0; + return pcibios_enable_irq(dev); } -void pcibios_disable_device (struct pci_dev *dev) +void pcibios_free_irq(struct pci_dev *dev) { - if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq) + if (pcibios_disable_irq) pcibios_disable_irq(dev); } +int pcibios_enable_device(struct pci_dev *dev, int mask) +{ + return pci_enable_resources(dev, mask); +} + int pci_ext_cfg_avail(void) { if (raw_pci_ext_ops) diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c index 27062303c881..fb7a1f96d80c 100644 --- a/arch/x86/pci/intel_mid_pci.c +++ b/arch/x86/pci/intel_mid_pci.c @@ -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. + */ } } diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index 9bd115484745..72108f0b66b1 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -1257,22 +1257,9 @@ static int pirq_enable_irq(struct pci_dev *dev) return 0; } -bool mp_should_keep_irq(struct device *dev) -{ - if (dev->power.is_prepared) - return true; -#ifdef CONFIG_PM - if (dev->power.runtime_status == RPM_SUSPENDING) - return true; -#endif - - return false; -} - static void pirq_disable_irq(struct pci_dev *dev) { - if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) && - dev->irq_managed && dev->irq) { + if (io_apic_assign_pci_irqs && dev->irq_managed && dev->irq) { mp_unmap_irq(dev->irq); dev->irq = 0; dev->irq_managed = 0; -- cgit v1.2.3