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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Aaron Lu <aaron.lu@intel.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux PCI <linux-pci@vger.kernel.org>,
	Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: [PATCH v2 2/6] ACPI / hotplug / PCI: Define hotplug context lock in the core
Date: Sun, 02 Feb 2014 01:55:24 +0100	[thread overview]
Message-ID: <2645803.XW74KNkQex@vostro.rjw.lan> (raw)
In-Reply-To: <1519631.YS65c9Af2C@vostro.rjw.lan>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Subsequent changes will require the ACPI core to acquire the lock
protecting the ACPIPHP hotplug contexts, so move the definition of
the lock to the core and change its name to be more generic.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/scan.c                |   11 +++++++++
 drivers/pci/hotplug/acpiphp_glue.c |   41 ++++++++++++++++++-------------------
 include/acpi/acpi_bus.h            |    2 +
 3 files changed, 33 insertions(+), 21 deletions(-)

Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -43,6 +43,7 @@ DEFINE_MUTEX(acpi_device_lock);
 LIST_HEAD(acpi_wakeup_device_list);
 static LIST_HEAD(acpi_device_del_list);
 static DEFINE_MUTEX(acpi_device_del_lock);
+static DEFINE_MUTEX(acpi_hp_context_lock);
 
 struct acpi_device_bus_id{
 	char bus_id[15];
@@ -62,6 +63,16 @@ void acpi_scan_lock_release(void)
 }
 EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
 
+void acpi_lock_hp_context(void)
+{
+	mutex_lock(&acpi_hp_context_lock);
+}
+
+void acpi_unlock_hp_context(void)
+{
+	mutex_unlock(&acpi_hp_context_lock);
+}
+
 int acpi_scan_add_handler(struct acpi_scan_handler *handler)
 {
 	if (!handler || !handler->attach)
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
@@ -58,7 +58,6 @@
 
 static LIST_HEAD(bridge_list);
 static DEFINE_MUTEX(bridge_mutex);
-static DEFINE_MUTEX(acpiphp_context_lock);
 
 static void handle_hotplug_event(acpi_handle handle, u32 type, void *data);
 static void acpiphp_sanitize_bus(struct pci_bus *bus);
@@ -75,7 +74,7 @@ static void acpiphp_context_handler(acpi
  * acpiphp_init_context - Create hotplug context and grab a reference to it.
  * @adev: ACPI device object to create the context for.
  *
- * Call under acpiphp_context_lock.
+ * Call under acpi_hp_context_lock.
  */
 static struct acpiphp_context *acpiphp_init_context(struct acpi_device *adev)
 {
@@ -100,7 +99,7 @@ static struct acpiphp_context *acpiphp_i
  * acpiphp_get_context - Get hotplug context and grab a reference to it.
  * @handle: ACPI object handle to get the context for.
  *
- * Call under acpiphp_context_lock.
+ * Call under acpi_hp_context_lock.
  */
 static struct acpiphp_context *acpiphp_get_context(acpi_handle handle)
 {
@@ -122,7 +121,7 @@ static struct acpiphp_context *acpiphp_g
  *
  * The context object is removed if there are no more references to it.
  *
- * Call under acpiphp_context_lock.
+ * Call under acpi_hp_context_lock.
  */
 static void acpiphp_put_context(struct acpiphp_context *context)
 {
@@ -151,7 +150,7 @@ static void free_bridge(struct kref *kre
 	struct acpiphp_slot *slot, *next;
 	struct acpiphp_func *func, *tmp;
 
-	mutex_lock(&acpiphp_context_lock);
+	acpi_lock_hp_context();
 
 	bridge = container_of(kref, struct acpiphp_bridge, ref);
 
@@ -175,7 +174,7 @@ static void free_bridge(struct kref *kre
 	pci_dev_put(bridge->pci_dev);
 	kfree(bridge);
 
-	mutex_unlock(&acpiphp_context_lock);
+	acpi_unlock_hp_context();
 }
 
 /*
@@ -291,17 +290,17 @@ static acpi_status register_slot(acpi_ha
 	device = (adr >> 16) & 0xffff;
 	function = adr & 0xffff;
 
-	mutex_lock(&acpiphp_context_lock);
+	acpi_lock_hp_context();
 	context = acpiphp_init_context(adev);
 	if (!context) {
-		mutex_unlock(&acpiphp_context_lock);
+		acpi_unlock_hp_context();
 		acpi_handle_err(handle, "No hotplug context\n");
 		return AE_NOT_EXIST;
 	}
 	newfunc = &context->func;
 	newfunc->function = function;
 	newfunc->parent = bridge;
-	mutex_unlock(&acpiphp_context_lock);
+	acpi_unlock_hp_context();
 
 	if (acpi_has_method(handle, "_EJ0"))
 		newfunc->flags = FUNC_HAS_EJ0;
@@ -319,9 +318,9 @@ static acpi_status register_slot(acpi_ha
 
 	slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
 	if (!slot) {
-		mutex_lock(&acpiphp_context_lock);
+		acpi_lock_hp_context();
 		acpiphp_put_context(context);
-		mutex_unlock(&acpiphp_context_lock);
+		acpi_unlock_hp_context();
 		return AE_NO_MEMORY;
 	}
 
@@ -396,7 +395,7 @@ static struct acpiphp_bridge *acpiphp_ha
 	struct acpiphp_context *context;
 	struct acpiphp_bridge *bridge = NULL;
 
-	mutex_lock(&acpiphp_context_lock);
+	acpi_lock_hp_context();
 	context = acpiphp_get_context(handle);
 	if (context) {
 		bridge = context->bridge;
@@ -405,7 +404,7 @@ static struct acpiphp_bridge *acpiphp_ha
 
 		acpiphp_put_context(context);
 	}
-	mutex_unlock(&acpiphp_context_lock);
+	acpi_unlock_hp_context();
 	return bridge;
 }
 
@@ -796,12 +795,12 @@ static void hotplug_event(u32 type, void
 	acpi_handle handle = context->adev->handle;
 	struct acpiphp_bridge *bridge;
 
-	mutex_lock(&acpiphp_context_lock);
+	acpi_lock_hp_context();
 	bridge = context->bridge;
 	if (bridge)
 		get_bridge(bridge);
 
-	mutex_unlock(&acpiphp_context_lock);
+	acpi_unlock_hp_context();
 
 	pci_lock_rescan_remove();
 
@@ -902,16 +901,16 @@ static void handle_hotplug_event(acpi_ha
 		goto out;
 	}
 
-	mutex_lock(&acpiphp_context_lock);
+	acpi_lock_hp_context();
 	context = acpiphp_get_context(handle);
 	if (context && !WARN_ON(context->adev->handle != handle)) {
 		get_bridge(context->func.parent);
 		acpiphp_put_context(context);
 		acpi_hotplug_execute(hotplug_event_work, context, type);
-		mutex_unlock(&acpiphp_context_lock);
+		acpi_unlock_hp_context();
 		return;
 	}
-	mutex_unlock(&acpiphp_context_lock);
+	acpi_unlock_hp_context();
 	ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
 
  out:
@@ -967,10 +966,10 @@ void acpiphp_enumerate_slots(struct pci_
 		 * parent is going to be handled by pciehp, in which case this
 		 * bridge is not interesting to us either.
 		 */
-		mutex_lock(&acpiphp_context_lock);
+		acpi_lock_hp_context();
 		context = acpiphp_get_context(handle);
 		if (!context) {
-			mutex_unlock(&acpiphp_context_lock);
+			acpi_unlock_hp_context();
 			put_device(&bus->dev);
 			pci_dev_put(bridge->pci_dev);
 			kfree(bridge);
@@ -980,7 +979,7 @@ void acpiphp_enumerate_slots(struct pci_
 		context->bridge = bridge;
 		/* Get a reference to the parent bridge. */
 		get_bridge(context->func.parent);
-		mutex_unlock(&acpiphp_context_lock);
+		acpi_unlock_hp_context();
 	}
 
 	/* must be added to the list prior to calling register_slot */
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -402,6 +402,8 @@ static inline bool acpi_bus_can_wakeup(a
 
 void acpi_scan_lock_acquire(void);
 void acpi_scan_lock_release(void);
+void acpi_lock_hp_context(void);
+void acpi_unlock_hp_context(void);
 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 int acpi_bus_register_driver(struct acpi_driver *driver);
 void acpi_bus_unregister_driver(struct acpi_driver *driver);


  parent reply	other threads:[~2014-02-02  0:47 UTC|newest]

Thread overview: 100+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-27  0:37 [PATCH 0/11] ACPI / hotplug / PCI: Updates on top of changes merged recently Rafael J. Wysocki
2014-01-27  0:38 ` [PATCH 1/11] ACPI / hotplug / PCI: Proper kerneldoc comments for enumeration/removal Rafael J. Wysocki
2014-01-27  0:38 ` [PATCH 2/11] ACPI / hotplug / PCI: Simplify register_slot() Rafael J. Wysocki
2014-01-27  0:39 ` [PATCH 3/11] ACPI / hotplug / PCI: Drop acpiphp_bus_trim() Rafael J. Wysocki
2014-01-27  0:40 ` [PATCH 4/11] ACPI / hotplug / PCI: Rework acpiphp_no_hotplug() Rafael J. Wysocki
2014-01-27  0:41 ` [PATCH 5/11] ACPI / hotplug / PCI: Store acpi_device pointer in acpiphp_context Rafael J. Wysocki
2014-01-27  0:41 ` [PATCH 6/11] ACPI / hotplug / PCI: Drop acpiphp_bus_add() Rafael J. Wysocki
2014-01-27  0:42 ` [PATCH 7/11] ACPI / hotplug / PCI: Drop crit_sect locking Rafael J. Wysocki
2014-01-27  0:43 ` [PATCH 8/11] ACPI / hotplug / PCI: Simplify hotplug_event() Rafael J. Wysocki
2014-01-27  0:44 ` [PATCH 9/11] ACPI / hotplug / PCI: Simplify disable_slot() Rafael J. Wysocki
2014-01-27  0:45 ` [PATCH 10/11] ACPI / hotplug / PCI: Use acpi_handle_debug() in hotplug_event() Rafael J. Wysocki
2014-01-27  0:46 ` [PATCH 11/11] ACPI / hotplug: Do not pass ACPI handles to ACPI dock operations Rafael J. Wysocki
2014-01-28 22:10 ` [PATCH 0/5][RFT] ACPI / hotplug / PCI: Consolidation of ACPIPHP with ACPI core device hotplug Rafael J. Wysocki
2014-01-28 22:12   ` [PATCH 1/5][RFT] ACPI / hotplug / PCI: Attach hotplug contexts to struct acpi_device Rafael J. Wysocki
2014-01-28 22:13   ` [PATCH 2/5][RFT] ACPI / hotplug: Introduce acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-01-28 22:14   ` [PATCH 3/5][RFT] ACPI / hotplug / PCI: Consolidate ACPIPHP with ACPI core hotplug Rafael J. Wysocki
2014-01-28 22:14   ` [PATCH 4/5][RFT] ACPI / hotplug / PCI: Simplify acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-01-28 22:16   ` [PATCH 5/5][RFT] ACPI / hotplug: Dispach hotplug notifications from acpi_bus_notify() Rafael J. Wysocki
2014-01-28 23:57   ` [PATCH 0/5][RFT] ACPI / hotplug / PCI: Consolidation of ACPIPHP with ACPI core device hotplug Rafael J. Wysocki
2014-01-28 23:58     ` [Resend][PATCH 1/5][RFT] ACPI / hotplug / PCI: Attach hotplug contexts to struct acpi_device Rafael J. Wysocki
2014-01-28 23:59     ` [Resend][PATCH 2/5][RFT] ACPI / hotplug: Introduce acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-01-28 23:59     ` [Update][PATCH 3/5][RFT] ACPI / hotplug / PCI: Consolidate ACPIPHP with ACPI core hotplug Rafael J. Wysocki
2014-01-29  0:00     ` [Update][PATCH 4/5][RFT] ACPI / hotplug / PCI: Simplify acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-01-31 15:28       ` Mika Westerberg
2014-01-31 15:42         ` Rafael J. Wysocki
2014-01-31 15:40           ` Mika Westerberg
2014-01-31 16:01             ` Mika Westerberg
2014-01-31 16:16               ` Rafael J. Wysocki
2014-01-31 17:09                 ` Mika Westerberg
2014-01-31 17:34                   ` Rafael J. Wysocki
2014-02-02  0:12                     ` Rafael J. Wysocki
2014-01-29  0:02     ` [Update][PATCH 5/5][RFT] ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify() Rafael J. Wysocki
2014-01-30 15:28       ` [Update 2x][PATCH " Rafael J. Wysocki
2014-02-02  0:52     ` [PATCH v2 0/6] ACPI / hotplug / PCI: Consolidation of ACPIPHP with ACPI core device hotplug Rafael J. Wysocki
2014-02-02  0:54       ` [PATCH v2 1/6] ACPI / hotplug: Fix theoretical race in acpi_hotplug_notify_cb() Rafael J. Wysocki
2014-02-02 17:01         ` Rafael J. Wysocki
2014-02-02  0:55       ` Rafael J. Wysocki [this message]
2014-02-02  0:56       ` [PATCH v2 3/6] ACPI / hotplug / PCI: Consolidate ACPIPHP with ACPI core hotplug Rafael J. Wysocki
2014-02-02  0:57       ` [PATCH v2 4/6] ACPI / hotplug / PCI: Rework the handling of eject requests Rafael J. Wysocki
2014-02-02  0:58       ` [PATCH v2 5/6] ACPI / hotplug / PCI: Simplify acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-02-02  0:58       ` [PATCH v2 6/6] ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify() Rafael J. Wysocki
2014-02-02 17:11       ` [PATCH v3 0/7] ACPI / hotplug / PCI: Consolidation of ACPIPHP with ACPI core device hotplug Rafael J. Wysocki
2014-02-02 17:12         ` [PATCH v3 1/7] ACPICA: Introduce acpi_get_data_full() and rework acpi_get_data() Rafael J. Wysocki
2014-02-02 17:15         ` [PATCH v3 2/7] ACPI / hotplug: Fix potential races in notify handlers Rafael J. Wysocki
2014-02-02 17:16         ` [PATCH v3 3/7] ACPI / hotplug / PCI: Define hotplug context lock in the core Rafael J. Wysocki
2014-02-02 17:17         ` [PATCH v3 4/7] ACPI / hotplug / PCI: Consolidate ACPIPHP with ACPI core hotplug Rafael J. Wysocki
2014-02-02 17:18         ` [PATCH v3 5/7] ACPI / hotplug / PCI: Rework the handling of eject requests Rafael J. Wysocki
2014-02-02 17:19         ` [PATCH v3 6/7] ACPI / hotplug / PCI: Simplify acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-02-02 17:20         ` [PATCH v3 7/7] ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify() Rafael J. Wysocki
2014-02-03 10:45         ` [PATCH v3 0/7] ACPI / hotplug / PCI: Consolidation of ACPIPHP with ACPI core device hotplug Mika Westerberg
2014-02-03 21:51           ` Rafael J. Wysocki
2014-02-02  0:19 ` [PATCH v2 0/13] ACPI / hotplug / PCI: Updates on top of changes merged recently Rafael J. Wysocki
2014-02-02  0:21   ` [PATCH v2 1/13] ACPI / hotplug / PCI: Remove entries from bus->devices in reverse order Rafael J. Wysocki
2014-02-02  0:22   ` [PATCH v2 2/13] ACPI / hotplug / PCI: Move PCI rescan-remove locking to hotplug_event() Rafael J. Wysocki
2014-02-02  0:23   ` [PATCH v2 3/13] ACPI / hotplug / PCI: Simplify disable_slot() Rafael J. Wysocki
2014-02-02  0:24   ` [PATCH v2 4/13] ACPI / hotplug / PCI: Proper kerneldoc comments for enumeration/removal Rafael J. Wysocki
2014-02-02  0:25   ` [PATCH v2 5/13] ACPI / hotplug / PCI: Simplify register_slot() Rafael J. Wysocki
2014-02-02  0:26   ` [PATCH v2 6/13] ACPI / hotplug / PCI: Drop acpiphp_bus_trim() Rafael J. Wysocki
2014-02-02  0:27   ` [PATCH v2 7/13] ACPI / hotplug / PCI: Rework acpiphp_no_hotplug() Rafael J. Wysocki
2014-02-02  0:27   ` [PATCH v2 8/13] ACPI / hotplug / PCI: Store acpi_device pointer in acpiphp_context Rafael J. Wysocki
2014-02-02  0:28   ` [PATCH v2 9/13] ACPI / hotplug / PCI: Drop acpiphp_bus_add() Rafael J. Wysocki
2014-02-02  0:29   ` [PATCH v2 10/13] ACPI / hotplug / PCI: Drop crit_sect locking Rafael J. Wysocki
2014-02-02  0:30   ` [PATCH v2 11/13] ACPI / hotplug / PCI: Simplify hotplug_event() Rafael J. Wysocki
2014-02-02  0:31   ` [PATCH v2 12/13] ACPI / hotplug / PCI: Use acpi_handle_debug() in hotplug_event() Rafael J. Wysocki
2014-02-02  0:31   ` [PATCH v2 13/13] ACPI / hotplug: Do not pass ACPI handles to ACPI dock operations Rafael J. Wysocki
2014-02-03  1:47   ` [PATCH] ACPI / hotplug / PCI: Scan root bus under the PCI rescan-remove lock Rafael J. Wysocki
2014-02-03 10:44   ` [PATCH v2 0/13] ACPI / hotplug / PCI: Updates on top of changes merged recently Mika Westerberg
2014-02-03 23:12     ` [PATCH v2 0/24] ACPI / hotplug / PCI: ACPIPHP updates and consolidation with ACPI core Rafael J. Wysocki
2014-02-03 23:14       ` [PATCH 1/24][Resend] ACPI / hotplug / PCI: Remove entries from bus->devices in reverse order Rafael J. Wysocki
2014-02-03 23:15       ` [PATCH 2/24][Resend] ACPI / hotplug / PCI: Move PCI rescan-remove locking to hotplug_event() Rafael J. Wysocki
2014-02-03 23:16       ` [PATCH 3/24][Resend] ACPI / hotplug / PCI: Scan root bus under the PCI rescan-remove lock Rafael J. Wysocki
2014-02-03 23:18       ` [PATCH 4/24][New] ACPI / hotplug / PCI: Fix bridge removal race in handle_hotplug_event() Rafael J. Wysocki
2014-02-03 23:18       ` [PATCH 5/24][New] ACPI / hotplug / PCI: Fix bridge removal race vs dock events Rafael J. Wysocki
2014-02-03 23:20       ` [PATCH 6/24][Resend] ACPI / hotplug / PCI: Simplify disable_slot() Rafael J. Wysocki
2014-02-03 23:21       ` [PATCH 7/24][Resend] ACPI / hotplug / PCI: Proper kerneldoc comments for enumeration/removal Rafael J. Wysocki
2014-02-03 23:22       ` [PATCH 8/24][Resend] ACPI / hotplug / PCI: Simplify register_slot() Rafael J. Wysocki
2014-02-03 23:23       ` [PATCH 9/24][Resend] ACPI / hotplug / PCI: Drop acpiphp_bus_trim() Rafael J. Wysocki
2014-02-03 23:24       ` [PATCH 10/24][Resend] ACPI / hotplug / PCI: Rework acpiphp_no_hotplug() Rafael J. Wysocki
2014-02-03 23:25       ` [PATCH 11/24][Update] ACPI / hotplug / PCI: Store acpi_device pointer in acpiphp_context Rafael J. Wysocki
2014-02-03 23:26       ` [PATCH 12/24][Resend] ACPI / hotplug / PCI: Drop acpiphp_bus_add() Rafael J. Wysocki
2014-02-03 23:27       ` [PATCH 13/24][Resend] ACPI / hotplug / PCI: Drop crit_sect locking Rafael J. Wysocki
2014-02-03 23:33       ` [PATCH 14/24][Update] ACPI / hotplug / PCI: Simplify hotplug_event() Rafael J. Wysocki
2014-02-03 23:33       ` [PATCH 15/24][Resend] ACPI / hotplug / PCI: Use acpi_handle_debug() in hotplug_event() Rafael J. Wysocki
2014-02-03 23:34       ` [PATCH 16/24][New] ACPI / hotplug / PCI: Do not pass ACPI handle to hotplug_event() Rafael J. Wysocki
2014-02-03 23:34       ` [PATCH 17/24][Resend] ACPICA: Introduce acpi_get_data_full() and rework acpi_get_data() Rafael J. Wysocki
2014-02-03 23:36       ` [PATCH 18/24][Update] ACPI / hotplug: Fix potential race in acpi_bus_notify() Rafael J. Wysocki
2014-02-03 23:36       ` [PATCH 19/24][Update] ACPI / hotplug / PCI: Define hotplug context lock in the core Rafael J. Wysocki
2014-02-03 23:37       ` [PATCH 20/24][Update] ACPI / hotplug / PCI: Consolidate ACPIPHP with ACPI core hotplug Rafael J. Wysocki
2014-02-06 13:07         ` [Update][PATCH 20/24] " Rafael J. Wysocki
2014-02-06 23:35           ` [Update 2x][PATCH " Rafael J. Wysocki
2014-02-03 23:38       ` [PATCH 21/24][Resend] ACPI / hotplug / PCI: Rework the handling of eject requests Rafael J. Wysocki
2014-02-03 23:39       ` [PATCH 22/24][Resend] ACPI / hotplug / PCI: Simplify acpi_install_hotplug_notify_handler() Rafael J. Wysocki
2014-02-06 13:09         ` [Update][PATCH 22/24] " Rafael J. Wysocki
2014-02-03 23:40       ` [PATCH 23/24][Update] ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify() Rafael J. Wysocki
2014-02-06 13:10         ` [Update][PATCH 23/24] " Rafael J. Wysocki
2014-02-03 23:41       ` [PATCH 24/24][New] ACPI / hotplug / PCI: Rework acpiphp_check_host_bridge() Rafael J. Wysocki
2014-02-05 10:14       ` [PATCH v2 0/24] ACPI / hotplug / PCI: ACPIPHP updates and consolidation with ACPI core Mika Westerberg
2014-02-05 10:59         ` Rafael J. Wysocki
2014-02-11  0:19 ` [PATCH 0/11] ACPI / hotplug / PCI: Updates on top of changes merged recently Bjorn Helgaas
2014-02-11 12:53   ` Rafael J. Wysocki

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