diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-11-07 01:41:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-29 11:27:55 -0800 |
| commit | cf9dec04b035890995b3cb46d930f08bf5e9581d (patch) | |
| tree | 433c9af01aa8bbf085f3a00501aadca115758d05 /drivers/acpi | |
| parent | 76641adddc5dc634cb7759dfa95d3d5a545678d1 (diff) | |
ACPI / hotplug: Fix handle_root_bridge_removal()
commit 2441191a19039002b2c454a261fb45986df15184 upstream.
It is required to do get_device() on the struct acpi_device in
question before passing it to acpi_bus_hot_remove_device() through
acpi_os_hotplug_execute(), because acpi_bus_hot_remove_device()
calls acpi_scan_hot_remove() that does put_device() on that
object.
The ACPI PCI root removal routine, handle_root_bridge_removal(),
doesn't do that, which may lead to premature freeing of the
device object or to executing put_device() on an object that
has been freed already.
Fix this problem by making handle_root_bridge_removal() use
get_device() as appropriate.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index d3874f425653..d7e53ea53d6c 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -608,9 +608,12 @@ static void handle_root_bridge_removal(struct acpi_device *device) ej_event->device = device; ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; + get_device(&device->dev); status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); - if (ACPI_FAILURE(status)) + if (ACPI_FAILURE(status)) { + put_device(&device->dev); kfree(ej_event); + } } static void _handle_hotplug_event_root(struct work_struct *work) |