ACPI: PCI: remove callback from acpi_pci_irq_lookup & acpi_pci_irq_derive
We currently pass a callback function (either acpi_pci_allocate_irq() or acpi_pci_free_irq()) to acpi_pci_irq_lookup() and acpi_pci_irq_derive(). I think it's simpler to remove the callback and just have the enable/ disable functions make the calls directly. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -339,8 +339,6 @@ void acpi_pci_irq_del_prt(int segment, int bus)
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/* --------------------------------------------------------------------------
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PCI Interrupt Routing Support
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-------------------------------------------------------------------------- */
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typedef int (*irq_lookup_func) (struct acpi_prt_entry *, int *, int *, char **);
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static int
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acpi_pci_allocate_irq(struct acpi_prt_entry *entry,
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int *triggering, int *polarity, char **link)
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@ -368,8 +366,7 @@ acpi_pci_allocate_irq(struct acpi_prt_entry *entry,
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}
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static int
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acpi_pci_free_irq(struct acpi_prt_entry *entry,
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int *triggering, int *polarity, char **link)
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acpi_pci_free_irq(struct acpi_prt_entry *entry)
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{
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int irq;
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@ -381,47 +378,29 @@ acpi_pci_free_irq(struct acpi_prt_entry *entry,
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return irq;
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}
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/*
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* acpi_pci_irq_lookup
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* success: return IRQ >= 0
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* failure: return -1
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*/
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static int
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acpi_pci_irq_lookup(struct pci_dev *dev, int pin,
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int *triggering,
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int *polarity, char **link, irq_lookup_func func)
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static struct acpi_prt_entry *
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acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
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{
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struct acpi_prt_entry *entry = NULL;
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int ret;
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struct acpi_prt_entry *entry;
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entry = acpi_pci_irq_find_prt_entry(dev, pin);
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if (!entry) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No %s[%c] _PRT entry\n",
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pci_name(dev), pin_name(pin)));
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return -1;
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return NULL;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
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pci_name(dev), pin_name(pin)));
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ret = func(entry, triggering, polarity, link);
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return ret;
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return entry;
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}
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/*
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* acpi_pci_irq_derive
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* success: return IRQ >= 0
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* failure: return < 0
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*/
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static int
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acpi_pci_irq_derive(struct pci_dev *dev,
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int pin,
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int *triggering,
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int *polarity, char **link, irq_lookup_func func)
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static struct acpi_prt_entry *
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acpi_pci_irq_derive(struct pci_dev *dev, int pin)
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{
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struct acpi_prt_entry *entry = NULL;
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struct pci_dev *bridge = dev;
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int irq = -1;
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u8 bridge_pin = 0, orig_pin = pin;
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@ -429,7 +408,7 @@ acpi_pci_irq_derive(struct pci_dev *dev,
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* Attempt to derive an IRQ for this device from a parent bridge's
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* PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).
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*/
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while (irq < 0 && bridge->bus->self) {
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while (!entry && bridge->bus->self) {
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pin = (((pin - 1) + PCI_SLOT(bridge->devfn)) % 4) + 1;
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bridge = bridge->bus->self;
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@ -440,26 +419,24 @@ acpi_pci_irq_derive(struct pci_dev *dev,
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"No interrupt pin configured for device %s\n",
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pci_name(bridge)));
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return -1;
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return NULL;
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}
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pin = bridge_pin;
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}
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irq = acpi_pci_irq_lookup(bridge,
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pin, triggering, polarity,
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link, func);
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entry = acpi_pci_irq_lookup(bridge, pin);
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}
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if (irq < 0) {
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if (!entry) {
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dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",
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pin_name(orig_pin));
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return -1;
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return NULL;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derived GSI %d for %s INT %c from %s\n",
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irq, pci_name(dev), pin_name(orig_pin), pci_name(bridge)));
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derived GSI for %s INT %c from %s\n",
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pci_name(dev), pin_name(orig_pin), pci_name(bridge)));
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return irq;
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return entry;
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}
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/*
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@ -470,6 +447,7 @@ acpi_pci_irq_derive(struct pci_dev *dev,
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int acpi_pci_irq_enable(struct pci_dev *dev)
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{
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struct acpi_prt_entry *entry;
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int gsi = 0;
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u8 pin = 0;
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int triggering = ACPI_LEVEL_SENSITIVE;
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@ -491,18 +469,20 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
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* First we check the PCI IRQ routing table (PRT) for an IRQ. PRT
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* values override any BIOS-assigned IRQs set during boot.
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*/
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gsi = acpi_pci_irq_lookup(dev, pin,
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&triggering, &polarity, &link,
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acpi_pci_allocate_irq);
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entry = acpi_pci_irq_lookup(dev, pin);
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/*
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* If no PRT entry was found, we'll try to derive an IRQ from the
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* device's parent bridge.
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*/
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if (gsi < 0)
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gsi = acpi_pci_irq_derive(dev, pin, &triggering,
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&polarity, &link,
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acpi_pci_allocate_irq);
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if (!entry)
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entry = acpi_pci_irq_derive(dev, pin);
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if (entry)
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gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity,
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&link);
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else
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gsi = -1;
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if (gsi < 0) {
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/*
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@ -559,10 +539,9 @@ void __attribute__ ((weak)) acpi_unregister_gsi(u32 i)
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void acpi_pci_irq_disable(struct pci_dev *dev)
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{
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struct acpi_prt_entry *entry;
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int gsi = 0;
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u8 pin = 0;
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int triggering = ACPI_LEVEL_SENSITIVE;
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int polarity = ACPI_ACTIVE_LOW;
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pin = dev->pin;
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@ -572,20 +551,20 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
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/*
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* First we check the PCI IRQ routing table (PRT) for an IRQ.
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*/
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gsi = acpi_pci_irq_lookup(dev, pin,
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&triggering, &polarity, NULL,
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acpi_pci_free_irq);
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entry = acpi_pci_irq_lookup(dev, pin);
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/*
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* If no PRT entry was found, we'll try to derive an IRQ from the
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* device's parent bridge.
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*/
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if (gsi < 0)
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gsi = acpi_pci_irq_derive(dev, pin,
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&triggering, &polarity, NULL,
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acpi_pci_free_irq);
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if (gsi < 0)
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if (!entry)
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entry = acpi_pci_irq_derive(dev, pin);
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if (!entry)
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return;
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gsi = acpi_pci_free_irq(entry);
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/*
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* TBD: It might be worth clearing dev->irq by magic constant
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* (e.g. PCI_UNDEFINED_IRQ).
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