diff options
Diffstat (limited to 'drivers/acpi/pci_irq.c')
| -rw-r--r-- | drivers/acpi/pci_irq.c | 55 |
1 files changed, 11 insertions, 44 deletions
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index b35e64d..b03bb84 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -382,6 +382,8 @@ static struct acpi_prt_entry * acpi_pci_irq_lookup(struct pci_dev *dev, int pin) { struct acpi_prt_entry *entry; + struct pci_dev *bridge; + u8 bridge_pin, orig_pin = pin; entry = acpi_pci_irq_find_prt_entry(dev, pin); if (entry) { @@ -390,19 +392,6 @@ acpi_pci_irq_lookup(struct pci_dev *dev, int pin) return entry; } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No %s[%c] _PRT entry\n", - pci_name(dev), pin_name(pin))); - return NULL; -} - -static struct acpi_prt_entry * -acpi_pci_irq_derive(struct pci_dev *dev, int pin) -{ - struct acpi_prt_entry *entry = NULL; - struct pci_dev *bridge; - u8 bridge_pin = 0, orig_pin = pin; - - /* * Attempt to derive an IRQ for this device from a parent bridge's * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). @@ -423,7 +412,7 @@ acpi_pci_irq_derive(struct pci_dev *dev, int pin) pin = bridge_pin; } - entry = acpi_pci_irq_lookup(bridge, pin); + entry = acpi_pci_irq_find_prt_entry(bridge, pin); if (entry) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derived GSI for %s INT %c from %s\n", @@ -467,26 +456,8 @@ int acpi_pci_irq_enable(struct pci_dev *dev) return 0; } - /* - * First we check the PCI IRQ routing table (PRT) for an IRQ. PRT - * values override any BIOS-assigned IRQs set during boot. - */ entry = acpi_pci_irq_lookup(dev, pin); - - /* - * If no PRT entry was found, we'll try to derive an IRQ from the - * device's parent bridge. - */ - if (!entry) - entry = acpi_pci_irq_derive(dev, pin); - - if (entry) - gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity, - &link); - else - gsi = -1; - - if (gsi < 0) { + if (!entry) { /* * IDE legacy mode controller IRQs are magic. Why do compat * extensions always make such a nasty mess. @@ -495,6 +466,13 @@ int acpi_pci_irq_enable(struct pci_dev *dev) (dev->class & 0x05) == 0) return 0; } + + if (entry) + gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity, + &link); + else + gsi = -1; + /* * No IRQ known to the ACPI subsystem - maybe the BIOS / * driver reported one, then use it. Exit in any case. @@ -550,18 +528,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev) if (!pin) return; - /* - * First we check the PCI IRQ routing table (PRT) for an IRQ. - */ entry = acpi_pci_irq_lookup(dev, pin); - - /* - * If no PRT entry was found, we'll try to derive an IRQ from the - * device's parent bridge. - */ - if (!entry) - entry = acpi_pci_irq_derive(dev, pin); - if (!entry) return; |