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path: root/drivers/pci/hotplug/pci_hotplug_core.c
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Diffstat (limited to 'drivers/pci/hotplug/pci_hotplug_core.c')
-rw-r--r--drivers/pci/hotplug/pci_hotplug_core.c155
1 files changed, 84 insertions, 71 deletions
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 535fce0f07f9..844580489d4d 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -347,125 +347,129 @@ static struct pci_slot_attribute hotplug_slot_attr_test = {
.store = test_write_file
};
-static int has_power_file(struct pci_slot *pci_slot)
+static bool has_power_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if ((slot->ops->enable_slot) ||
(slot->ops->disable_slot) ||
(slot->ops->get_power_status))
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_attention_file(struct pci_slot *pci_slot)
+static bool has_attention_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if ((slot->ops->set_attention_status) ||
(slot->ops->get_attention_status))
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_latch_file(struct pci_slot *pci_slot)
+static bool has_latch_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_latch_status)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_adapter_file(struct pci_slot *pci_slot)
+static bool has_adapter_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_adapter_status)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_max_bus_speed_file(struct pci_slot *pci_slot)
+static bool has_max_bus_speed_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_max_bus_speed)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_cur_bus_speed_file(struct pci_slot *pci_slot)
+static bool has_cur_bus_speed_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->get_cur_bus_speed)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
-static int has_test_file(struct pci_slot *pci_slot)
+static bool has_test_file(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
- return -ENODEV;
+ return false;
if (slot->ops->hardware_test)
- return 0;
- return -ENOENT;
+ return true;
+ return false;
}
static int fs_add_slot(struct pci_slot *slot)
{
int retval = 0;
- if (has_power_file(slot) == 0) {
- retval = sysfs_create_file(&slot->kobj, &hotplug_slot_attr_power.attr);
+ /* Create symbolic link to the hotplug driver module */
+ pci_hp_create_module_link(slot);
+
+ if (has_power_file(slot)) {
+ retval = sysfs_create_file(&slot->kobj,
+ &hotplug_slot_attr_power.attr);
if (retval)
goto exit_power;
}
- if (has_attention_file(slot) == 0) {
+ if (has_attention_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_attention.attr);
if (retval)
goto exit_attention;
}
- if (has_latch_file(slot) == 0) {
+ if (has_latch_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_latch.attr);
if (retval)
goto exit_latch;
}
- if (has_adapter_file(slot) == 0) {
+ if (has_adapter_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_presence.attr);
if (retval)
goto exit_adapter;
}
- if (has_max_bus_speed_file(slot) == 0) {
+ if (has_max_bus_speed_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
- &hotplug_slot_attr_max_bus_speed.attr);
+ &hotplug_slot_attr_max_bus_speed.attr);
if (retval)
goto exit_max_speed;
}
- if (has_cur_bus_speed_file(slot) == 0) {
+ if (has_cur_bus_speed_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
- &hotplug_slot_attr_cur_bus_speed.attr);
+ &hotplug_slot_attr_cur_bus_speed.attr);
if (retval)
goto exit_cur_speed;
}
- if (has_test_file(slot) == 0) {
+ if (has_test_file(slot)) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_test.attr);
if (retval)
@@ -475,55 +479,61 @@ static int fs_add_slot(struct pci_slot *slot)
goto exit;
exit_test:
- if (has_cur_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr);
-
+ if (has_cur_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_cur_bus_speed.attr);
exit_cur_speed:
- if (has_max_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
-
+ if (has_max_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_max_bus_speed.attr);
exit_max_speed:
- if (has_adapter_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
-
+ if (has_adapter_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_presence.attr);
exit_adapter:
- if (has_latch_file(slot) == 0)
+ if (has_latch_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
-
exit_latch:
- if (has_attention_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr);
-
+ if (has_attention_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_attention.attr);
exit_attention:
- if (has_power_file(slot) == 0)
+ if (has_power_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
exit_power:
+ pci_hp_remove_module_link(slot);
exit:
return retval;
}
static void fs_remove_slot(struct pci_slot *slot)
{
- if (has_power_file(slot) == 0)
+ if (has_power_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
- if (has_attention_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr);
+ if (has_attention_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_attention.attr);
- if (has_latch_file(slot) == 0)
+ if (has_latch_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
- if (has_adapter_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
+ if (has_adapter_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_presence.attr);
- if (has_max_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
+ if (has_max_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_max_bus_speed.attr);
- if (has_cur_bus_speed_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr);
+ if (has_cur_bus_speed_file(slot))
+ sysfs_remove_file(&slot->kobj,
+ &hotplug_slot_attr_cur_bus_speed.attr);
- if (has_test_file(slot) == 0)
+ if (has_test_file(slot))
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr);
+
+ pci_hp_remove_module_link(slot);
}
static struct hotplug_slot *get_slot_from_name (const char *name)
@@ -540,10 +550,10 @@ static struct hotplug_slot *get_slot_from_name (const char *name)
}
/**
- * pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
+ * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
* @bus: bus this slot is on
* @slot: pointer to the &struct hotplug_slot to register
- * @slot_nr: slot number
+ * @devnr: device number
* @name: name registered with kobject core
*
* Registers a hotplug slot with the pci hotplug subsystem, which will allow
@@ -551,8 +561,9 @@ static struct hotplug_slot *get_slot_from_name (const char *name)
*
* Returns 0 if successful, anything else for an error.
*/
-int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr,
- const char *name)
+int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus,
+ int devnr, const char *name,
+ struct module *owner, const char *mod_name)
{
int result;
struct pci_slot *pci_slot;
@@ -567,14 +578,16 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr,
return -EINVAL;
}
- mutex_lock(&pci_hp_mutex);
+ slot->ops->owner = owner;
+ slot->ops->mod_name = mod_name;
+ mutex_lock(&pci_hp_mutex);
/*
* No problems if we call this interface from both ACPI_PCI_SLOT
* driver and call it here again. If we've already created the
* pci_slot, the interface will simply bump the refcount.
*/
- pci_slot = pci_create_slot(bus, slot_nr, name, slot);
+ pci_slot = pci_create_slot(bus, devnr, name, slot);
if (IS_ERR(pci_slot)) {
result = PTR_ERR(pci_slot);
goto out;
@@ -684,6 +697,6 @@ MODULE_LICENSE("GPL");
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
-EXPORT_SYMBOL_GPL(pci_hp_register);
+EXPORT_SYMBOL_GPL(__pci_hp_register);
EXPORT_SYMBOL_GPL(pci_hp_deregister);
EXPORT_SYMBOL_GPL(pci_hp_change_slot_info);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.