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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-12-08 21:30:51 -0700
committerLen Brown <len.brown@intel.com>2008-12-30 21:28:19 -0500
commit063563b4b8f87e2be0e127ccf3a8e6eef6309ff4 (patch)
treed2e1c9c8d7c0d29d52df1ae9117cbd1cd516a4d9 /drivers/acpi/pci_irq.c
parentc458033c9b72a81b890d97ec6339694bab252383 (diff)
downloadlwn-063563b4b8f87e2be0e127ccf3a8e6eef6309ff4.tar.gz
lwn-063563b4b8f87e2be0e127ccf3a8e6eef6309ff4.zip
ACPI: PCI: lookup _PRT entry by PCI dev and pin, not segment/bus/dev/pin
There's no reason to pass around segment, bus, and device independently when we can just pass the pci_dev pointer, which carries all those already. The pci_dev contains an interrupt pin, too, but we still have to pass both the pci_dev and the pin because when we use a bridge to derive an IRQ, we need the pin from the downstream device, not the bridge. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/pci_irq.c')
-rw-r--r--drivers/acpi/pci_irq.c27
1 files changed, 12 insertions, 15 deletions
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index c4a5c49809db..aabf8a965aff 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -69,11 +69,13 @@ static inline char pin_name(int pin)
PCI IRQ Routing Table (PRT) Support
-------------------------------------------------------------------------- */
-static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
- int bus,
- int device, int pin)
+static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
+ int pin)
{
struct acpi_prt_entry *entry = NULL;
+ int segment = pci_domain_nr(dev->bus);
+ int bus = dev->bus->number;
+ int device = PCI_SLOT(dev->devfn);
if (!acpi_prt.count)
return NULL;
@@ -385,23 +387,18 @@ acpi_pci_free_irq(struct acpi_prt_entry *entry,
* failure: return -1
*/
static int
-acpi_pci_irq_lookup(struct pci_bus *bus,
- int device,
- int pin,
+acpi_pci_irq_lookup(struct pci_dev *dev, int pin,
int *triggering,
int *polarity, char **link, irq_lookup_func func)
{
struct acpi_prt_entry *entry = NULL;
- int segment = pci_domain_nr(bus);
- int bus_nr = bus->number;
int ret;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Searching for _PRT entry for %04x:%02x:%02x[%c]\n",
- segment, bus_nr, device, pin_name(pin)));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Searching for _PRT entry for %s[%c]\n",
+ pci_name(dev), pin_name(pin)));
- entry = acpi_pci_irq_find_prt_entry(segment, bus_nr, device, pin);
+ entry = acpi_pci_irq_find_prt_entry(dev, pin);
if (!entry) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_PRT entry not found\n"));
return -1;
@@ -447,7 +444,7 @@ acpi_pci_irq_derive(struct pci_dev *dev,
pin = bridge_pin;
}
- irq = acpi_pci_irq_lookup(bridge->bus, PCI_SLOT(bridge->devfn),
+ irq = acpi_pci_irq_lookup(bridge,
pin, triggering, polarity,
link, func);
}
@@ -493,7 +490,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
* First we check the PCI IRQ routing table (PRT) for an IRQ. PRT
* values override any BIOS-assigned IRQs set during boot.
*/
- gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
+ gsi = acpi_pci_irq_lookup(dev, pin,
&triggering, &polarity, &link,
acpi_pci_allocate_irq);
@@ -574,7 +571,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
/*
* First we check the PCI IRQ routing table (PRT) for an IRQ.
*/
- gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
+ gsi = acpi_pci_irq_lookup(dev, pin,
&triggering, &polarity, NULL,
acpi_pci_free_irq);
/*