Joonyoung Shim bc7c36eedb clocksource/exynos_mct: Clear interrupt when cpu is shut down ... When a CPU goes offline a potentially pending timer interrupt is not cleared. When the CPU comes online again then the pending interrupt is delivered before the per cpu clockevent device is initialized. As a consequence the tick interrupt handler dereferences a NULL pointer. [ 51.251378] Unable to handle kernel NULL pointer dereference at virtual address 00000040 [ 51.289348] task: ee942d00 task.stack: ee960000 [ 51.293861] PC is at tick_periodic+0x38/0xb0 [ 51.298102] LR is at tick_handle_periodic+0x1c/0x90 Clear the pending interrupt in the cpu dying path. Fixes: 56a94f1391 ("clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier") Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Cc: linux-samsung-soc@vger.kernel.org Cc: cw00.choi@samsung.com Cc: daniel.lezcano@linaro.org Cc: stable@vger.kernel.org Cc: javier@osg.samsung.com Cc: kgene@kernel.org Cc: krzk@kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1484628876-22065-1-git-send-email-jy0922.shim@samsung.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2017-01-17 10:08:38 +01:00
..
acpi_pm.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
arc_timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
arm_arch_timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
arm_global_timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
armv7m_systick.c
asm9260_timer.c
bcm2835_timer.c	clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomap	2016-11-22 09:22:59 +01:00
bcm_kona_timer.c	clocksource/drivers/kona: Fix get_counter() error handling	2016-08-17 13:08:31 +02:00
cadence_ttc_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
clksrc_st_lpc.c
clksrc-dbx500-prcmu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
clksrc-probe.c
clps711x-timer.c
cs5535-clockevt.c
dummy_timer.c	cpu/hotplug: Cleanup state names	2016-12-25 10:47:44 +01:00
dw_apb_timer_of.c
dw_apb_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
em_sti.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
exynos_mct.c	clocksource/exynos_mct: Clear interrupt when cpu is shut down	2017-01-17 10:08:38 +01:00
fsl_ftm_timer.c
h8300_timer8.c
h8300_timer16.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
h8300_tpu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
i8253.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
jcore-pit.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
Kconfig	clocksource: import ARC timer driver	2016-11-30 11:54:25 -08:00
Makefile	clocksource: import ARC timer driver	2016-11-30 11:54:25 -08:00
meson6_timer.c
metag_generic.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
mips-gic-timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
mmio.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
moxart_timer.c	clocksource/drivers/moxart: Plug memory and mapping leaks	2016-12-19 11:19:57 +01:00
mps2-timer.c
mtk_timer.c
mxs_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
nomadik-mtu.c
numachip.c
pxa_timer.c	ARM: sa11x0/pxa: acquire timer rate from the clock rate	2016-10-18 09:12:36 +02:00
qcom-timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
rockchip_timer.c
samsung_pwm_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
scx200_hrt.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sh_cmt.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sh_mtu2.c
sh_tmu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sun4i_timer.c	clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function	2016-08-26 15:56:01 +02:00
tango_xtal.c
tcb_clksrc.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
tegra20_timer.c
time-armada-370-xp.c	cpu/hotplug: Cleanup state names	2016-12-25 10:47:44 +01:00
time-efm32.c
time-lpc32xx.c
time-orion.c
time-pistachio.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-atlas7.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
timer-atmel-pit.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-atmel-st.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-digicolor.c
timer-imx-gpt.c
timer-integrator-ap.c
timer-keystone.c
timer-nps.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-oxnas-rps.c	clocksource/drivers/oxnas: Add OX820 compatible	2016-09-12 07:28:46 +02:00
timer-prima2.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-sp804.c
timer-sp.h
timer-stm32.c
timer-sun5i.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-ti-32k.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-u300.c
versatile.c
vf_pit_timer.c
vt8500_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
zevio-timer.c