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Date: Wed, 09 Sep 2009 14:49:35 -0600
From: Alex Chiang <achiang@...com>
To: jbarnes@...tuousgeek.org
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Subject: [PATCH 2/2] PCI Hotplug: convert acpi_pci_detect_ejectable() to take
an acpi_handle
acpi_pci_detect_ejectable() goes through effort to convert its
struct pci_bus arg to an acpi_handle, but every time we use this
interface, we already have the handle available.
So let's just use the handle instead of converting back and forth.
Cc: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Signed-off-by: Alex Chiang <achiang@...com>
---
drivers/pci/hotplug/acpi_pcihp.c | 9 +++------
drivers/pci/hotplug/acpiphp_glue.c | 33 +++++++++++----------------------
drivers/pci/hotplug/pciehp_acpi.c | 5 +++--
include/linux/pci_hotplug.h | 2 +-
4 files changed, 18 insertions(+), 31 deletions(-)
diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index eb15958..80af75c 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -500,18 +500,15 @@ check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv)
/**
* acpi_pci_detect_ejectable - check if the PCI bus has ejectable slots
- * @pbus - PCI bus to scan
+ * @handle - handle of the PCI bus to scan
*
* Returns 1 if the PCI bus has ACPI based ejectable slots, 0 otherwise.
*/
-int acpi_pci_detect_ejectable(struct pci_bus *pbus)
+int acpi_pci_detect_ejectable(acpi_handle handle)
{
- acpi_handle handle;
int found = 0;
- if (!(handle = acpi_pci_get_bridge_handle(pbus)))
- return 0;
- acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
check_hotplug, (void *)&found, NULL);
return found;
}
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index e72e0ad..680c336 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -62,22 +62,6 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus);
static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus);
static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context);
-static struct pci_bus *pci_bus_from_handle(acpi_handle handle)
-{
- struct pci_bus *pbus;
- struct acpi_pci_root *root;
-
- root = acpi_pci_find_root(handle);
- if (root)
- pbus = root->bus;
- else {
- struct pci_dev *pdev = acpi_get_pci_dev(handle);
- pbus = pdev->subordinate;
- pci_dev_put(pdev);
- }
- return pbus;
-}
-
/* callback routine to check for the existence of a pci dock device */
static acpi_status
is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv)
@@ -279,11 +263,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
/* see if it's worth looking at this bridge */
static int detect_ejectable_slots(acpi_handle handle)
{
- int found;
- struct pci_bus *pbus;
-
- pbus = pci_bus_from_handle(handle);
- found = acpi_pci_detect_ejectable(pbus);
+ int found = acpi_pci_detect_ejectable(handle);
if (!found) {
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
is_pci_dock_device, (void *)&found, NULL);
@@ -1364,7 +1344,16 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
/* Program resources in newly inserted bridge */
static int acpiphp_configure_bridge (acpi_handle handle)
{
- struct pci_bus *bus = pci_bus_from_handle(handle);
+ struct pci_bus *bus;
+
+ if (acpi_is_root_bridge(handle)) {
+ struct acpi_pci_root *root = acpi_pci_find_root(handle);
+ bus = root->bus;
+ } else {
+ struct pci_dev *pdev = acpi_get_pci_dev(handle);
+ bus = pdev->subordinate;
+ pci_dev_put(pdev);
+ }
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index 9604801..0c6aa99 100644
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ b/drivers/pci/hotplug/pciehp_acpi.c
@@ -47,7 +47,7 @@ int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
{
if (slot_detection_mode != PCIEHP_DETECT_ACPI)
return 0;
- if (acpi_pci_detect_ejectable(dev->subordinate))
+ if (acpi_pci_detect_ejectable(dev->dev.archdata.acpi_handle))
return 0;
return -ENODEV;
}
@@ -94,7 +94,8 @@ static int __init dummy_probe(struct pcie_device *dev)
dup_slot_id++;
}
list_add_tail(&slot->slot_list, &dummy_slots);
- if (!acpi_slot_detected && acpi_pci_detect_ejectable(pbus))
+ if (!acpi_slot_detected &&
+ acpi_pci_detect_ejectable(pbus->self->dev.archdata.acpi_handle))
acpi_slot_detected = 1;
return -ENODEV; /* dummy driver always returns error */
}
diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
index 1b00cc3..f0c31ae 100644
--- a/include/linux/pci_hotplug.h
+++ b/include/linux/pci_hotplug.h
@@ -231,7 +231,7 @@ extern acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus,
struct hotplug_params *hpp);
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
-int acpi_pci_detect_ejectable(struct pci_bus *pbus);
+int acpi_pci_detect_ejectable(acpi_handle handle);
#endif
#endif
--
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