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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-24 12:49:49 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-24 12:49:49 +0100
commitcf860be639d86ed77af179c925085ae0721ae602 (patch)
tree3acb93b90f48f2bc4838ba80cd66dce60a40825a /drivers/acpi/internal.h
parente5656271b0221a53e9f74856385112fdcec0dd60 (diff)
ACPI / scan: Prevent device add uevents from racing with user space
ACPI core adds sysfs device files after the given devices have been registered with device_register(), which is not appropriate, because it may lead to race conditions with user space tools using those files. Fix the problem by delaying the KOBJ_ADD uevent for ACPI devices until after all of the devices' sysfs files have been created. This also fixes a use-after-free in acpi_device_unregister(). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi/internal.h')
-rw-r--r--drivers/acpi/internal.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 1f004f35bc67..c5a61cd6c1a5 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -40,10 +40,11 @@ static inline void acpi_debugfs_init(void) { return; }
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
-int acpi_device_register(struct acpi_device *device,
- void (*release)(struct device *));
+int acpi_device_add(struct acpi_device *device,
+ void (*release)(struct device *));
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
int type, unsigned long long sta);
+void acpi_device_add_finalize(struct acpi_device *device);
void acpi_free_ids(struct acpi_device *device);
/* --------------------------------------------------------------------------