This is a note to let you know that I've just added the patch titled
clocksource: Exynos_mct: Register clock event after request_irq()
to the 3.10-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-exynos_mct-register-clock-event-after-request_irq.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8db6e5104b77de5d0b7002b95069da0992a34be9 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Date: Wed, 16 Apr 2014 14:36:45 +0000
Subject: clocksource: Exynos_mct: Register clock event after request_irq()
From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
commit 8db6e5104b77de5d0b7002b95069da0992a34be9 upstream.
After hotplugging CPU1 the first call of interrupt handler for CPU1
oneshot timer was called on CPU0 because it fired before setting IRQ
affinity. Affected are SoCs where Multi Core Timer interrupts are
shared (SPI), e.g. Exynos 4210.
During setup of the MCT timers the clock event device should be
registered after setting the affinity for interrupt. This will prevent
starting the timer too early.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Cc: Tomasz Figa <t.figa@xxxxxxxxxxx>,
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>,
Cc: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx,
Link: http://lkml.kernel.org/r/20140416143316.299247848@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clocksource/exynos_mct.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -429,8 +429,6 @@ static int __cpuinit exynos4_local_timer
evt->set_mode = exynos4_tick_set_mode;
evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
evt->rating = 450;
- clockevents_config_and_register(evt, clk_rate / (TICK_BASE_CNT + 1),
- 0xf, 0x7fffffff);
exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
@@ -448,6 +446,8 @@ static int __cpuinit exynos4_local_timer
} else {
enable_percpu_irq(mct_irqs[MCT_L0_IRQ], 0);
}
+ clockevents_config_and_register(evt, clk_rate / (TICK_BASE_CNT + 1),
+ 0xf, 0x7fffffff);
return 0;
}
Patches currently in stable-queue which might be from k.kozlowski@xxxxxxxxxxx are
queue-3.10/genirq-allow-forcing-cpu-affinity-of-interrupts.patch
queue-3.10/irqchip-gic-support-forced-affinity-setting.patch
queue-3.10/clocksource-exynos_mct-register-clock-event-after-request_irq.patch
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