diff options
| author | Yongbae Park <yongbae2@gmail.com> | 2015-03-03 13:05:48 +0900 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-04-16 20:11:27 -0400 |
| commit | 5820c59b7d2b67f3ffadfb88d85dd2ce81b1241f (patch) | |
| tree | e9e84295e1bd985d834ad198d07e3e18858ae6a9 /drivers | |
| parent | c43695430948e0448e0f474b9bc024373c090a8f (diff) | |
clockevents: sun5i: Fix setup_irq init sequence
[ Upstream commit 1096be084ac59927158ce80ff1d31c33eed0e565 ]
The interrupt is enabled before the handler is set. Even this bug
did not appear, it is potentially dangerous as it can lead to a
NULL pointer dereference.
Fix the error by enabling the interrupt after
clockevents_config_and_register() is called.
Cc: stable@vger.kernel.org
Signed-off-by: Yongbae Park <yongbae2@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clocksource/timer-sun5i.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c index 02268448dc85..5dcbf90b8015 100644 --- a/drivers/clocksource/timer-sun5i.c +++ b/drivers/clocksource/timer-sun5i.c @@ -178,10 +178,6 @@ static void __init sun5i_timer_init(struct device_node *node) ticks_per_jiffy = DIV_ROUND_UP(rate, HZ); - ret = setup_irq(irq, &sun5i_timer_irq); - if (ret) - pr_warn("failed to setup irq %d\n", irq); - /* Enable timer0 interrupt */ val = readl(timer_base + TIMER_IRQ_EN_REG); writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG); @@ -191,6 +187,10 @@ static void __init sun5i_timer_init(struct device_node *node) clockevents_config_and_register(&sun5i_clockevent, rate, TIMER_SYNC_TICKS, 0xffffffff); + + ret = setup_irq(irq, &sun5i_timer_irq); + if (ret) + pr_warn("failed to setup irq %d\n", irq); } CLOCKSOURCE_OF_DECLARE(sun5i_a13, "allwinner,sun5i-a13-hstimer", sun5i_timer_init); |