diff mbox

[08/10] ACPI: simplify acpi_pci_irq_add_prt() API

Message ID 20090602152516.7346.24236.stgit@bob.kio (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Alexander Chiang June 2, 2009, 3:25 p.m. UTC
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@hp.com>
Signed-off-by: Alex Chiang <achiang@hp.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(-)


--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Comments

Bjorn Helgaas June 2, 2009, 5:30 p.m. UTC | #1
On Tuesday 02 June 2009 09:25:16 am Alex Chiang wrote:
> 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.

Nice patch.

> 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));

I think you can just do this:

	acpi_pci_irq_add_prt(device->handle, root->bus);

Bjorn
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Alexander Chiang June 2, 2009, 5:41 p.m. UTC | #2
* Bjorn Helgaas <bjorn.helgaas@hp.com>:
> On Tuesday 02 June 2009 09:25:16 am Alex Chiang wrote:
> > 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.
> 
> Nice patch.
> 
> > 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));
> 
> I think you can just do this:
> 
> 	acpi_pci_irq_add_prt(device->handle, root->bus);

Ah, indeed you are right, thanks Bjorn.

Len, would you like me to respin, or can you just make the
modification for me?

Thanks.

/ac

--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

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) */