This is a note to let you know that I've just added the patch titled
clocksource: efm32: Fix a NULL pointer dereference
to the 3.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
clocksource-efm32-fix-a-null-pointer-dereference.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7b8f10da3bf1056546133c9f54f49ce389fd95ab Mon Sep 17 00:00:00 2001
From: Yongbae Park <yongbae2@xxxxxxxxx>
Date: Tue, 3 Mar 2015 19:46:49 +0900
Subject: clocksource: efm32: Fix a NULL pointer dereference
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From: Yongbae Park <yongbae2@xxxxxxxxx>
commit 7b8f10da3bf1056546133c9f54f49ce389fd95ab upstream.
The initialisation of the efm32 clocksource first sets up the irq and only
after that initialises the data needed for irq handling. In case this
initialisation is delayed the irq handler would dereference a NULL pointer.
I'm not aware of anything that could delay the process in such a way, but it's
better to be safe than sorry, so setup the irq only when the clock event device
is ready.
Acked-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Yongbae Park <yongbae2@xxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clocksource/time-efm32.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/clocksource/time-efm32.c
+++ b/drivers/clocksource/time-efm32.c
@@ -225,12 +225,12 @@ static int __init efm32_clockevent_init(
clock_event_ddata.base = base;
clock_event_ddata.periodic_top = DIV_ROUND_CLOSEST(rate, 1024 * HZ);
- setup_irq(irq, &efm32_clock_event_irq);
-
clockevents_config_and_register(&clock_event_ddata.evtdev,
DIV_ROUND_CLOSEST(rate, 1024),
0xf, 0xffff);
+ setup_irq(irq, &efm32_clock_event_irq);
+
return 0;
err_get_irq:
Patches currently in stable-queue which might be from yongbae2@xxxxxxxxx are
queue-3.19/clocksource-efm32-fix-a-null-pointer-dereference.patch
queue-3.19/clockevents-sun5i-fix-setup_irq-init-sequence.patch
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