re: ACPI: Add D3 cold state

[Dan Carpenter <error27@gmail.com>]

Commit 28c2103dad04 "ACPI: Add D3 cold state" introduced a read past
the end of the array in drivers/acpi/bus.c

   224  static int __acpi_bus_set_power(struct acpi_device *device, int state)
   225  {
   226          int result = 0;
   227          acpi_status status = AE_OK;
   228          char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
   229
   230          if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
                                                                   ^^^^^^^^^^^^^^^^^^
	This is 4 now.

   231                  return -EINVAL;
   232
   233          /* Make sure this is a valid target state */
   234
   235          if (state == device->power.state) {
   236                  ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
   237                                    state));
   238                  return 0;
   239          }
   240
   241          if (!device->power.states[state].flags.valid) {
                                   ^^^^^^^^^^^^^
	This array has 4 elements so we are one space past the end
	of the array.

   242                  printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
   243                  return -ENODEV;
   244          }

regards,
dan carpenter