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53 lines
1.7 KiB
53 lines
1.7 KiB
From a32b173c1e9039d2ce45a1bb8267bfdd33204461 Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Thu, 25 Apr 2013 20:31:49 +0000
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Subject: [PATCH 125/196] clockevents: Add module refcount
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commit ccf33d6880f39a35158fff66db13000ae4943fac upstream.
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We want to be able to remove clockevent modules as well. Add a
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refcount so we don't remove a module with an active clock event
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device.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: John Stultz <john.stultz@linaro.org>
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Cc: Magnus Damm <magnus.damm@gmail.com>
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Link: http://lkml.kernel.org/r/20130425143436.307435149@linutronix.de
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: Kim Phillips <kim.phillips@linaro.org>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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kernel/time/tick-broadcast.c | 2 ++
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kernel/time/tick-common.c | 3 +++
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2 files changed, 5 insertions(+)
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diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
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index 19ee339..b219c9f 100644
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--- a/kernel/time/tick-broadcast.c
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+++ b/kernel/time/tick-broadcast.c
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@@ -92,6 +92,8 @@ void tick_install_broadcast_device(struct clock_event_device *dev)
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if (!try_module_get(dev->owner))
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return;
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+ if (!try_module_get(dev->owner))
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+ return;
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clockevents_exchange_device(cur, dev);
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if (cur)
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diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
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index 086216c..2dcea16 100644
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--- a/kernel/time/tick-common.c
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+++ b/kernel/time/tick-common.c
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@@ -273,6 +273,9 @@ void tick_check_new_device(struct clock_event_device *newdev)
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if (!try_module_get(newdev->owner))
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return;
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+ if (!try_module_get(newdev->owner))
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+ return;
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+
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/*
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* Replace the eventually existing device by the new
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* device. If the current device is the broadcast device, do
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--
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1.9.1
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