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John Keeping e84b4a84e5 PM / QoS: Fix memory leak on resume_latency.notifiers 
Since commit 2d984ad132 (PM / QoS: Introcuce latency tolerance device
PM QoS type) we reassign "c" to point at qos->latency_tolerance before
freeing c->notifiers, but the notifiers field of latency_tolerance is
never used.

Restore the original behaviour of freeing the notifiers pointer on
qos->resume_latency, which is used, and fix the following kmemleak
warning.

unreferenced object 0xed9dba00 (size 64):
  comm "kworker/0:1", pid 36, jiffies 4294670128 (age 15202.983s)
  hex dump (first 32 bytes):
    00 00 00 00 04 ba 9d ed 04 ba 9d ed 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<c06f6084>] kmemleak_alloc+0x74/0xb8
    [<c011c964>] kmem_cache_alloc_trace+0x170/0x25c
    [<c035f448>] dev_pm_qos_constraints_allocate+0x3c/0xe4
    [<c035f574>] __dev_pm_qos_add_request+0x84/0x1a0
    [<c035f6cc>] dev_pm_qos_add_request+0x3c/0x54
    [<c03c3fc4>] usb_hub_create_port_device+0x110/0x2b8
    [<c03b2a60>] hub_probe+0xadc/0xc80
    [<c03bb050>] usb_probe_interface+0x1b4/0x260
    [<c035773c>] driver_probe_device+0x198/0x40c
    [<c0357b14>] __device_attach_driver+0x8c/0x98
    [<c0355bbc>] bus_for_each_drv+0x8c/0x9c
    [<c0357494>] __device_attach+0x98/0x138
    [<c0357c64>] device_initial_probe+0x14/0x18
    [<c03569dc>] bus_probe_device+0x30/0x88
    [<c0354c54>] device_add+0x430/0x554
    [<c03b92d8>] usb_set_configuration+0x660/0x6fc

Fixes: 2d984ad132 (PM / QoS: Introcuce latency tolerance device PM QoS type)
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
History 2017-02-18 02:20:53 +01:00
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README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.