target/linux/brcm2708/patches-3.10/0125-clockevents-Add-module-refcount.patch

   1 From a32b173c1e9039d2ce45a1bb8267bfdd33204461 Mon Sep 17 00:00:00 2001
   2 From: Thomas Gleixner <tglx@linutronix.de>
   3 Date: Thu, 25 Apr 2013 20:31:49 +0000
   4 Subject: [PATCH 125/196] clockevents: Add module refcount
   5
   6 commit ccf33d6880f39a35158fff66db13000ae4943fac upstream.
   7
   8 We want to be able to remove clockevent modules as well. Add a
   9 refcount so we don't remove a module with an active clock event
  10 device.
  11
  12 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  13 Cc: John Stultz <john.stultz@linaro.org>
  14 Cc: Magnus Damm <magnus.damm@gmail.com>
  15 Link: http://lkml.kernel.org/r/20130425143436.307435149@linutronix.de
  16 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  17 Cc: Kim Phillips <kim.phillips@linaro.org>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19 ---
  20  kernel/time/tick-broadcast.c | 2 ++
  21  kernel/time/tick-common.c    | 3 +++
  22  2 files changed, 5 insertions(+)
  23
  24 diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
  25 index 19ee339..b219c9f 100644
  26 --- a/kernel/time/tick-broadcast.c
  27 +++ b/kernel/time/tick-broadcast.c
  28 @@ -92,6 +92,8 @@ void tick_install_broadcast_device(struct clock_event_device *dev)
  29
  30         if (!try_module_get(dev->owner))
  31                 return;
  32 +       if (!try_module_get(dev->owner))
  33 +               return;
  34
  35         clockevents_exchange_device(cur, dev);
  36         if (cur)
  37 diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
  38 index 086216c..2dcea16 100644
  39 --- a/kernel/time/tick-common.c
  40 +++ b/kernel/time/tick-common.c
  41 @@ -273,6 +273,9 @@ void tick_check_new_device(struct clock_event_device *newdev)
  42         if (!try_module_get(newdev->owner))
  43                 return;
  44
  45 +       if (!try_module_get(newdev->owner))
  46 +               return;
  47 +
  48         /*
  49          * Replace the eventually existing device by the new
  50          * device. If the current device is the broadcast device, do
  51 --
  52 1.9.1
  53