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Date: Fri, 12 Apr 2013 23:44:27 +0800
From: Jiang Liu <liuj97@...il.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
"Rafael J . Wysocki" <rjw@...k.pl>
Cc: Yijing Wang <wangyijing@...wei.com>,
Yinghai Lu <yinghai@...nel.org>, Jiang Liu <liuj97@...il.com>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Toshi Kani <toshi.kani@...com>,
Myron Stowe <myron.stowe@...hat.com>,
Jiang Liu <jiang.liu@...wei.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH v9 13/16] PCI/acpiphp: use normal list to simplify implementation
From: Yijing Wang <wangyijing@...wei.com>
Use normal list for struct acpiphp_slot to simplify implementation.
Signed-off-by: Yijing Wang <wangyijing@...wei.com>
Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: Toshi Kani <toshi.kani@...com>
Cc: linux-pci@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
drivers/pci/hotplug/acpiphp.h | 4 ++--
drivers/pci/hotplug/acpiphp_glue.c | 23 ++++++++++-------------
2 files changed, 12 insertions(+), 15 deletions(-)
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 69b4aac..0b30045 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -73,8 +73,8 @@ static inline const char *slot_name(struct slot *slot)
*/
struct acpiphp_bridge {
struct list_head list;
+ struct list_head slots;
acpi_handle handle;
- struct acpiphp_slot *slots;
/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
struct acpiphp_func *func;
@@ -97,7 +97,7 @@ struct acpiphp_bridge {
* PCI slot information for each *physical* PCI slot
*/
struct acpiphp_slot {
- struct acpiphp_slot *next;
+ struct list_head node;
struct acpiphp_bridge *bridge; /* parent */
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 372c030..6bfd5a0 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -154,7 +154,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
acpi_handle tmp;
acpi_status status = AE_OK;
unsigned long long adr, sun;
- int device, function, retval;
+ int device, function, retval, found = 0;
struct pci_bus *pbus = bridge->pci_bus;
struct pci_dev *pdev;
u32 val;
@@ -208,14 +208,15 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
}
/* search for objects that share the same slot */
- for (slot = bridge->slots; slot; slot = slot->next)
+ list_for_each_entry(slot, &bridge->slots, node)
if (slot->device == device) {
if (slot->sun != sun)
warn("sibling found, but _SUN doesn't match!\n");
+ found = 1;
break;
}
- if (!slot) {
+ if (!found) {
slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
if (!slot) {
kfree(newfunc);
@@ -228,9 +229,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
INIT_LIST_HEAD(&slot->funcs);
mutex_init(&slot->crit_sect);
- slot->next = bridge->slots;
- bridge->slots = slot;
-
+ list_add_tail(&slot->node, &bridge->slots);
bridge->nr_slots++;
dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
@@ -289,7 +288,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
err_exit:
bridge->nr_slots--;
- bridge->slots = slot->next;
+ list_del(&slot->node);
kfree(slot);
kfree(newfunc);
@@ -353,7 +352,7 @@ static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle
struct acpiphp_func *func;
list_for_each_entry(bridge, &bridge_list, list) {
- for (slot = bridge->slots; slot; slot = slot->next) {
+ list_for_each_entry(slot, &bridge->slots, node) {
list_for_each_entry(func, &slot->funcs, sibling) {
if (func->handle == handle)
return func;
@@ -400,9 +399,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
err("failed to install interrupt notify handler\n");
}
- slot = bridge->slots;
- while (slot) {
- next = slot->next;
+ list_for_each_entry_safe(slot, next, &bridge->slots, node) {
list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) {
if (is_dock_device(func->handle)) {
unregister_hotplug_dock_device(func->handle);
@@ -421,7 +418,6 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
acpiphp_unregister_hotplug_slot(slot);
list_del(&slot->funcs);
kfree(slot);
- slot = next;
}
put_device(&bridge->pci_bus->dev);
@@ -820,7 +816,7 @@ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
enabled = disabled = 0;
- for (slot = bridge->slots; slot; slot = slot->next) {
+ list_for_each_entry(slot, &bridge->slots, node) {
unsigned int status = get_slot_status(slot);
if (slot->flags & SLOT_ENABLED) {
if (status == ACPI_STA_ALL)
@@ -1095,6 +1091,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
return;
}
+ INIT_LIST_HEAD(&bridge->slots);
bridge->handle = handle;
bridge->pci_dev = pci_dev_get(bus->self);
bridge->pci_bus = bus;
--
1.7.9.5
--
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