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Message-ID: <2675342.96SJAC4hmM@vostro.rjw.lan>
Date: Thu, 18 Jul 2013 01:28:30 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
LKML <linux-kernel@...r.kernel.org>,
Linux PCI <linux-pci@...r.kernel.org>,
Yinghai Lu <yinghai@...nel.org>, Jiang Liu <liuj97@...il.com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 20/30] ACPI / hotplug / PCI: Consolidate slot disabling and ejecting
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
Both acpiphp_disable_slot() and acpiphp_eject_slot() are always
called together so instead of calling each separately we can
consolidate them into one function acpiphp_disable_and_eject_slot()
that does both (but it will return success on _EJ0 failures that
were ignored in the majority of call sites anyway).
[rjw: Rebased plus minor tweaks]
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/pci/hotplug/acpiphp.h | 3 --
drivers/pci/hotplug/acpiphp_core.c | 6 ----
drivers/pci/hotplug/acpiphp_glue.c | 50 +++++++++++++------------------------
3 files changed, 20 insertions(+), 39 deletions(-)
Index: linux-pm/drivers/pci/hotplug/acpiphp.h
===================================================================
--- linux-pm.orig/drivers/pci/hotplug/acpiphp.h
+++ linux-pm/drivers/pci/hotplug/acpiphp.h
@@ -188,8 +188,7 @@ void acpiphp_unregister_hotplug_slot(str
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
int acpiphp_enable_slot(struct acpiphp_slot *slot);
-int acpiphp_disable_slot(struct acpiphp_slot *slot);
-int acpiphp_eject_slot(struct acpiphp_slot *slot);
+int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
Index: linux-pm/drivers/pci/hotplug/acpiphp_core.c
===================================================================
--- linux-pm.orig/drivers/pci/hotplug/acpiphp_core.c
+++ linux-pm/drivers/pci/hotplug/acpiphp_core.c
@@ -155,15 +155,11 @@ static int enable_slot(struct hotplug_sl
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
- int retval;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
/* disable the specified slot */
- retval = acpiphp_disable_slot(slot->acpi_slot);
- if (!retval)
- retval = acpiphp_eject_slot(slot->acpi_slot);
- return retval;
+ return acpiphp_disable_and_eject_slot(slot->acpi_slot);
}
Index: linux-pm/drivers/pci/hotplug/acpiphp_glue.c
===================================================================
--- linux-pm.orig/drivers/pci/hotplug/acpiphp_glue.c
+++ linux-pm/drivers/pci/hotplug/acpiphp_glue.c
@@ -765,27 +765,6 @@ static unsigned int get_slot_status(stru
}
/**
- * acpiphp_eject_slot - physically eject the slot
- * @slot: ACPI PHP slot
- */
-int acpiphp_eject_slot(struct acpiphp_slot *slot)
-{
- struct acpiphp_func *func;
-
- list_for_each_entry(func, &slot->funcs, sibling) {
- /* We don't want to call _EJ0 on non-existing functions. */
- if (!(func->flags & FUNC_HAS_EJ0))
- continue;
-
- if (ACPI_FAILURE(acpi_evaluate_ej0(func_to_handle(func))))
- return -1;
- else
- break;
- }
- return 0;
-}
-
-/**
* acpiphp_check_bridge - re-enumerate devices
* @bridge: where to begin re-enumeration
*
@@ -805,13 +784,11 @@ static int acpiphp_check_bridge(struct a
if (slot->flags & SLOT_ENABLED) {
if (status == ACPI_STA_ALL)
continue;
- retval = acpiphp_disable_slot(slot);
- if (retval) {
- err("Error occurred in disabling\n");
+
+ retval = acpiphp_disable_and_eject_slot(slot);
+ if (retval)
goto err_exit;
- } else {
- acpiphp_eject_slot(slot);
- }
+
disabled++;
} else {
if (status != ACPI_STA_ALL)
@@ -951,9 +928,7 @@ static void hotplug_event(acpi_handle ha
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
dbg("%s: Device eject notify on %s\n", __func__, objname);
- if (!(acpiphp_disable_slot(func->slot)))
- acpiphp_eject_slot(func->slot);
-
+ acpiphp_disable_and_eject_slot(func->slot);
break;
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
@@ -1148,11 +1123,12 @@ int acpiphp_enable_slot(struct acpiphp_s
}
/**
- * acpiphp_disable_slot - power off slot
+ * acpiphp_disable_and_eject_slot - power off and eject slot
* @slot: ACPI PHP slot
*/
-int acpiphp_disable_slot(struct acpiphp_slot *slot)
+int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot)
{
+ struct acpiphp_func *func;
int retval = 0;
mutex_lock(&slot->crit_sect);
@@ -1167,6 +1143,16 @@ int acpiphp_disable_slot(struct acpiphp_
if (retval)
goto err_exit;
+ list_for_each_entry(func, &slot->funcs, sibling)
+ if (func->flags & FUNC_HAS_EJ0) {
+ acpi_handle handle = func_to_handle(func);
+
+ if (ACPI_FAILURE(acpi_evaluate_ej0(handle)))
+ acpi_handle_err(handle, "_EJ0 failed\n");
+
+ break;
+ }
+
err_exit:
mutex_unlock(&slot->crit_sect);
return retval;
--
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