From a3b1b1ef78cd2ffb5d3a223465064dee05929dc3 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 7 Nov 2013 01:41:58 +0100 Subject: [PATCH] ACPI / hotplug: Merge device hot-removal routines There is no real reasn why acpi_bus_device_eject() and acpi_bus_hot_remove_device() should work differently, so rework acpi_bus_device_eject() so that it can be called internally by both acpi_bus_hot_remove_device() and acpi_eject_store_work(). Accordingly, rework acpi_hotplug_notify_cb() to queue up the execution of acpi_bus_hot_remove_device() through acpi_os_hotplug_execute() on eject request notifications. Signed-off-by: Rafael J. Wysocki Acked-by: Toshi Kani --- drivers/acpi/scan.c | 84 ++++++++++++++++++++++++----------------------------- 1 file changed, 38 insertions(+), 46 deletions(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 1217ba3..4a0a591 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -285,10 +285,9 @@ static int acpi_scan_hot_remove(struct acpi_device *device) return 0; } -static void acpi_bus_device_eject(void *context) +static void acpi_bus_device_eject(struct acpi_device *device, u32 ost_src) { - acpi_handle handle = context; - struct acpi_device *device = NULL; + acpi_handle handle = device->handle; struct acpi_scan_handler *handler; u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; int error; @@ -296,20 +295,19 @@ static void acpi_bus_device_eject(void *context) lock_device_hotplug(); mutex_lock(&acpi_scan_lock); - acpi_bus_get_device(handle, &device); - if (!device) - goto err_out; - handler = device->handler; - if (!handler || !handler->hotplug.enabled) + if (!handler || !handler->hotplug.enabled) { + put_device(&device->dev); goto err_support; + } + + if (ost_src == ACPI_NOTIFY_EJECT_REQUEST) + acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, + ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); - acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, - ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); if (handler->hotplug.mode == AHM_CONTAINER) kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); - get_device(&device->dev); error = acpi_scan_hot_remove(device); if (error == -EPERM) { goto err_support; @@ -325,8 +323,7 @@ static void acpi_bus_device_eject(void *context) err_support: ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; err_out: - acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, - NULL); + acpi_evaluate_hotplug_ost(handle, ost_src, ost_code, NULL); goto out; } @@ -408,10 +405,20 @@ static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); } +/** + * acpi_bus_hot_remove_device: Hot-remove a device and its children. + * @context: Address of the ACPI device object to hot-remove. + */ +void acpi_bus_hot_remove_device(void *context) +{ + acpi_bus_device_eject(context, ACPI_NOTIFY_EJECT_REQUEST); +} + static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) { acpi_osd_exec_callback callback; struct acpi_scan_handler *handler = data; + struct acpi_device *adev; acpi_status status; if (!handler->hotplug.enabled) @@ -428,44 +435,29 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) break; case ACPI_NOTIFY_EJECT_REQUEST: acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); - callback = acpi_bus_device_eject; - break; + status = acpi_bus_get_device(handle, &adev); + if (ACPI_FAILURE(status)) + goto err_out; + + get_device(&adev->dev); + callback = acpi_bus_hot_remove_device; + status = acpi_os_hotplug_execute(callback, adev); + if (ACPI_SUCCESS(status)) + return; + + put_device(&adev->dev); + goto err_out; default: /* non-hotplug event; possibly handled by other handler */ return; } status = acpi_os_hotplug_execute(callback, handle); - if (ACPI_FAILURE(status)) - acpi_evaluate_hotplug_ost(handle, type, - ACPI_OST_SC_NON_SPECIFIC_FAILURE, - NULL); -} - -void __acpi_bus_hot_remove_device(struct acpi_device *device, u32 ost_src) -{ - acpi_handle handle = device->handle; - int error; - - lock_device_hotplug(); - mutex_lock(&acpi_scan_lock); - - error = acpi_scan_hot_remove(device); - if (error && handle) - acpi_evaluate_hotplug_ost(handle, ost_src, - ACPI_OST_SC_NON_SPECIFIC_FAILURE, - NULL); - - mutex_unlock(&acpi_scan_lock); - unlock_device_hotplug(); -} + if (ACPI_SUCCESS(status)) + return; -/** - * acpi_bus_hot_remove_device: Hot-remove a device and its children. - * @context: Address of the ACPI device object to hot-remove. - */ -void acpi_bus_hot_remove_device(void *context) -{ - __acpi_bus_hot_remove_device(context, ACPI_NOTIFY_EJECT_REQUEST); + err_out: + acpi_evaluate_hotplug_ost(handle, type, + ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); } static ssize_t real_power_state_show(struct device *dev, @@ -496,7 +488,7 @@ static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); static void acpi_eject_store_work(void *context) { - __acpi_bus_hot_remove_device(context, ACPI_OST_EC_OSPM_EJECT); + acpi_bus_device_eject(context, ACPI_OST_EC_OSPM_EJECT); } static ssize_t -- 2.7.4