Merge tag 'pm+acpi-3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "These include a fix for a recent ACPI hotplug regression, four
  concurrency related fixes and one PCI device removal fix for
  ACPI-based PCI hotplug (ACPIPHP), intel_pstate fix that should go into
  stable, three simple ACPI cleanups and a new entry for the ACPI video
  blacklist.

  Specifics:

   - Fix for a recent ACPI hotplug regression causing a NULL pointer
     dereference to occur while handling ACPI eject notifications for
     already ejected devices.  From Toshi Kani.

   - Four concurrency-related fixes for ACPIPHP.  Two of them add
     missing locking and the other two fix race conditions related to
     reference counting.

   - ACPIPHP fix to avoid NULL pointer dereferences during device
     removal involving Virtual Funcions.

   - intel_pstate fix to make it compute the percentage of time the CPU
     is busy properly.  From Dirk Brandewie.

   - Removal of two unnecessary NULL pointer checks in ACPI code and a
     fix for sscanf() format string from Dan Carpenter and Luis G.F.

   - New ACPI video blacklist entry for HP EliteBook Revolve 810 from
     Mika Westerberg"

* tag 'pm+acpi-3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / hotplug: Fix panic on eject to ejected device
  ACPI / battery: Fix incorrect sscanf() string in acpi_battery_init_alarm()
  ACPI / proc: remove unneeded NULL check
  ACPI / utils: remove a pointless NULL check
  ACPI / video: Add HP EliteBook Revolve 810 to the blacklist
  intel_pstate: Take core C0 time into account for core busy calculation
  ACPI / hotplug / PCI: Fix bridge removal race vs dock events
  ACPI / hotplug / PCI: Fix bridge removal race in handle_hotplug_event()
  ACPI / hotplug / PCI: Scan root bus under the PCI rescan-remove lock
  ACPI / hotplug / PCI: Move PCI rescan-remove locking to hotplug_event()
  ACPI / hotplug / PCI: Remove entries from bus->devices in reverse order

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 7384158c7f87..57b053f424d1 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -484,7 +484,6 @@ static void acpi_device_hotplug(void *data, u32 src)
 static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
 {
         u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
-        struct acpi_scan_handler *handler = data;
         struct acpi_device *adev;
         acpi_status status;
 
@@ -500,7 +499,10 @@ 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");
-                if (!handler->hotplug.enabled) {
+                if (!adev->handler)
+                        goto err_out;
+
+                if (!adev->handler->hotplug.enabled) {
                         acpi_handle_err(handle, "Eject disabled\n");
                         ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
                         goto err_out;