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Message-ID: <20090602152516.7346.24236.stgit@bob.kio>
Date: Tue, 02 Jun 2009 09:25:16 -0600
From: Alex Chiang <achiang@...com>
To: lenb@...nel.org
Cc: linux-acpi@...r.kernel.org, Bjorn Helgaas <bjorn.helgaas@...com>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH 08/10] ACPI: simplify acpi_pci_irq_add_prt() API
A PCI domain cannot change as you descend down subordinate buses, which
makes the 'segment' argument to acpi_pci_irq_add_prt() useless.
Change the interface to take a struct pci_bus *, from whence we can derive
the bus number and segment. Reducing the number of arguments makes life
simpler for callers.
Cc: Bjorn Helgaas <bjorn.helgaas@...com>
Signed-off-by: Alex Chiang <achiang@...com>
---
drivers/acpi/pci_bind.c | 8 ++++----
drivers/acpi/pci_irq.c | 10 +++++-----
drivers/acpi/pci_root.c | 5 +++--
include/acpi/acpi_drivers.h | 2 +-
4 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index 0469cf2..96264d2 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -137,7 +137,7 @@ static int acpi_pci_bind(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
- unsigned char bus;
+ struct pci_bus *bus;
struct pci_dev *dev;
dev = acpi_get_pci_dev(device->handle);
@@ -170,11 +170,11 @@ static int acpi_pci_bind(struct acpi_device *device)
return 0;
if (dev->subordinate)
- bus = dev->subordinate->number;
+ bus = dev->subordinate;
else
- bus = dev->bus->number;
+ bus = dev->bus;
- acpi_pci_irq_add_prt(device->handle, pci_domain_nr(dev->bus), bus);
+ acpi_pci_irq_add_prt(device->handle, bus);
return 0;
}
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 51b9f82..3ed944c 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -182,7 +182,7 @@ static void do_prt_fixups(struct acpi_prt_entry *entry,
}
}
-static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
+static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
struct acpi_pci_routing_table *prt)
{
struct acpi_prt_entry *entry;
@@ -196,8 +196,8 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
* 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
* it here.
*/
- entry->id.segment = segment;
- entry->id.bus = bus;
+ entry->id.segment = pci_domain_nr(bus);
+ entry->id.bus = bus->number;
entry->id.device = (prt->address >> 16) & 0xFFFF;
entry->pin = prt->pin + 1;
@@ -242,7 +242,7 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
return 0;
}
-int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
+int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
{
acpi_status status;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -271,7 +271,7 @@ int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
entry = buffer.pointer;
while (entry && (entry->length > 0)) {
- acpi_pci_irq_add_entry(handle, segment, bus, entry);
+ acpi_pci_irq_add_entry(handle, bus, entry);
entry = (struct acpi_pci_routing_table *)
((unsigned long)entry + entry->length);
}
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 25ddbb6..aa67f72 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -537,8 +537,9 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
*/
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_SUCCESS(status))
- result = acpi_pci_irq_add_prt(device->handle, root->id.segment,
- root->id.bus);
+ result = acpi_pci_irq_add_prt(device->handle,
+ pci_find_bus(root->id.segment,
+ root->id.bus));
/*
* Scan and bind all _ADR-Based Devices
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 1c50f4f..c21d83f 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -90,7 +90,7 @@ int acpi_pci_link_free_irq(acpi_handle handle);
/* ACPI PCI Interrupt Routing (pci_irq.c) */
-int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus);
+int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus);
void acpi_pci_irq_del_prt(int segment, int bus);
/* ACPI PCI Device Binding (pci_bind.c) */
--
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