From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: tglx@linutronix.de, daniel.lezcano@linaro.org
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Subject: [PATCH 15/93] clocksource/drivers/exynos_mct: Convert init function to return error
Date: Thu, 7 Jul 2016 10:00:48 +0200 [thread overview]
Message-ID: <1467878526-1238-15-git-send-email-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <1467878526-1238-1-git-send-email-daniel.lezcano@linaro.org>
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctly
or
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.
Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
drivers/clocksource/exynos_mct.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index be09bc0..f6caed0 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -232,7 +232,7 @@ static cycles_t exynos4_read_current_timer(void)
return exynos4_read_count_32();
}
-static void __init exynos4_clocksource_init(void)
+static int __init exynos4_clocksource_init(void)
{
exynos4_mct_frc_start();
@@ -244,6 +244,8 @@ static void __init exynos4_clocksource_init(void)
panic("%s: can't register clocksource\n", mct_frc.name);
sched_clock_register(exynos4_read_sched_clock, 32, clk_rate);
+
+ return 0;
}
static void exynos4_mct_comp0_stop(void)
@@ -335,12 +337,14 @@ static struct irqaction mct_comp_event_irq = {
.dev_id = &mct_comp_device,
};
-static void exynos4_clockevent_init(void)
+static int exynos4_clockevent_init(void)
{
mct_comp_device.cpumask = cpumask_of(0);
clockevents_config_and_register(&mct_comp_device, clk_rate,
0xf, 0xffffffff);
setup_irq(mct_irqs[MCT_G0_IRQ], &mct_comp_event_irq);
+
+ return 0;
}
static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick);
@@ -516,7 +520,7 @@ static struct notifier_block exynos4_mct_cpu_nb = {
.notifier_call = exynos4_mct_cpu_notify,
};
-static void __init exynos4_timer_resources(struct device_node *np, void __iomem *base)
+static int __init exynos4_timer_resources(struct device_node *np, void __iomem *base)
{
int err, cpu;
struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
@@ -572,15 +576,17 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem
/* Immediately configure the timer on the boot CPU */
exynos4_local_timer_setup(mevt);
- return;
+ return 0;
out_irq:
free_percpu_irq(mct_irqs[MCT_L0_IRQ], &percpu_mct_tick);
+ return err;
}
-static void __init mct_init_dt(struct device_node *np, unsigned int int_type)
+static int __init mct_init_dt(struct device_node *np, unsigned int int_type)
{
u32 nr_irqs, i;
+ int ret;
mct_int_type = int_type;
@@ -600,20 +606,26 @@ static void __init mct_init_dt(struct device_node *np, unsigned int int_type)
for (i = MCT_L0_IRQ; i < nr_irqs; i++)
mct_irqs[i] = irq_of_parse_and_map(np, i);
- exynos4_timer_resources(np, of_iomap(np, 0));
- exynos4_clocksource_init();
- exynos4_clockevent_init();
+ ret = exynos4_timer_resources(np, of_iomap(np, 0));
+ if (ret)
+ return ret;
+
+ ret = exynos4_clocksource_init();
+ if (ret)
+ return ret;
+
+ return exynos4_clockevent_init();
}
-static void __init mct_init_spi(struct device_node *np)
+static int __init mct_init_spi(struct device_node *np)
{
return mct_init_dt(np, MCT_INT_SPI);
}
-static void __init mct_init_ppi(struct device_node *np)
+static int __init mct_init_ppi(struct device_node *np)
{
return mct_init_dt(np, MCT_INT_PPI);
}
-CLOCKSOURCE_OF_DECLARE(exynos4210, "samsung,exynos4210-mct", mct_init_spi);
-CLOCKSOURCE_OF_DECLARE(exynos4412, "samsung,exynos4412-mct", mct_init_ppi);
+CLOCKSOURCE_OF_DECLARE_RET(exynos4210, "samsung,exynos4210-mct", mct_init_spi);
+CLOCKSOURCE_OF_DECLARE_RET(exynos4412, "samsung,exynos4412-mct", mct_init_ppi);
--
1.9.1
next prev parent reply other threads:[~2016-07-07 8:03 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-07 7:59 [GIT PULL] clockevents for 4.8 Daniel Lezcano
2016-07-07 8:00 ` [PATCH 01/93] clocksource/drivers/armada-370-xp: Make syscore_ops static Daniel Lezcano
2016-07-07 8:00 ` [PATCH 02/93] clocksource/drivers/digicolor: Fix warning of non-static function Daniel Lezcano
2016-07-07 8:00 ` [PATCH 03/93] clocksource/drivers/samsung_pwm_timer: Fix endian accessors Daniel Lezcano
2016-07-07 8:00 ` [PATCH 04/93] clocksource/drivers/samsung_pwm: Fix typo in Kconfig Daniel Lezcano
2016-07-07 8:00 ` [PATCH 05/93] dt-bindings: Document rk3399 rk-timer bindings Daniel Lezcano
2016-07-07 8:00 ` [PATCH 06/93] clocksource/drivers/rockchip: Add the dynamic irq flag to the timer Daniel Lezcano
2016-07-07 8:00 ` [PATCH 07/93] clocksource/drivers/rockchip: Add support for the rk3399 SoC Daniel Lezcano
2016-07-07 8:00 ` [PATCH 08/93] arm64: dts: rockchip: Add rktimer device node for rk3399 Daniel Lezcano
2016-07-07 8:00 ` [PATCH 09/93] clocksource/drivers/oxnas-rps: Add Oxford Semiconductor RPS Dual Timer Daniel Lezcano
2016-07-07 8:00 ` [PATCH 10/93] dt-bindings: clocksource: Add Oxford Semiconductor RPS Timer bindings Daniel Lezcano
2016-07-07 8:00 ` [PATCH 11/93] of: Add a new macro to declare_of for one parameter function returning a value Daniel Lezcano
2016-07-07 8:00 ` [PATCH 12/93] clocksource/drivers/clksrc-probe: Introduce init functions with return code Daniel Lezcano
2016-07-07 8:00 ` [PATCH 13/93] clocksource/drivers/rockchip_timer: Convert init function to return error Daniel Lezcano
2016-07-07 8:00 ` [PATCH 14/93] clocksource/drivers/mtk_timer: " Daniel Lezcano
2016-07-07 8:00 ` Daniel Lezcano [this message]
2016-07-07 8:00 ` [PATCH 16/93] clocksource/drivers/asm9260: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 17/93] clocksource/drivers/cadence_ttc: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 18/93] clocksource/drivers/st_lpc: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 19/93] clocksource/drivers/dw_apb_timer: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 20/93] clocksource/drivers/clps711x: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 21/93] clocksource/drivers/digicolor: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 22/93] clocksource/drivers/armv7m_systick: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 23/93] clocksource/drivers/bcm2835_timer: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 24/93] clocksource/drivers/bcm_kona: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 25/93] clocksource/drivers/clksrc-dbx500: " Daniel Lezcano
2016-07-07 8:00 ` [PATCH 26/93] clocksource/drivers/fsl_ftm_timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 27/93] clocksource/drivers/arm_arch_timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 28/93] clocksource/drivers/arm_global_timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 29/93] clocksource/drivers/h8300_timer16: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 30/93] clocksource/drivers/h8300_timer8: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 31/93] clocksource/drivers/h8300_tpu: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 32/93] clocksource/drivers/meson6_timer.c: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 33/93] clocksource/drivers/mips-gic-timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 34/93] clocksource/drivers/moxart: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 35/93] clocksource/drivers/mps2-timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 36/93] clocksource/drivers/mxs: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 37/93] clocksource/drivers/nomadik-mtu: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 38/93] clocksource/drivers/pxa: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 39/93] clocksource/drivers/qcom: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 40/93] clocksource/drivers/samsung_pwm: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 41/93] clocksource/drivers/sun4i: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 42/93] clocksource/drivers/tango_xtal: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 43/93] clocksource/drivers/tegra20: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 44/93] clocksource/drivers/time-armada-370-xp: " Daniel Lezcano
2016-07-12 15:11 ` Anna-Maria Gleixner
2016-07-12 15:18 ` Thomas Gleixner
2016-07-12 15:33 ` Anna-Maria Gleixner
2016-07-12 15:40 ` [tip:timers/core] clocksource/drivers/time-armada-370-xp: Fix return value check tip-bot for Anna-Maria Gleixner
2016-07-07 8:01 ` [PATCH 45/93] clocksource/drivers/time-efm32: Convert init function to return error Daniel Lezcano
2016-07-07 8:01 ` [PATCH 46/93] clocksource/drivers/time-lpc32xx: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 47/93] clocksource/drivers/orion: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 48/93] clocksource/drivers/pistachio: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 49/93] clocksource/drivers/atlas7: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 50/93] clocksource/drivers/atmel-pit: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 51/93] clocksource/drivers/atmel-st: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 52/93] clocksource/drivers/prima2: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 53/93] clocksource/drivers/imx-gpt: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 54/93] clocksource/drivers/integrator-ap: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 55/93] clocksource/drivers/keystone: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 56/93] clocksource/drivers/sp804: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 57/93] clocksource/drivers/stm32: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 58/93] clocksource/drivers/sun5i: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 59/93] clocksource/drivers/ti-32k: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 60/93] clocksource/drivers/u300: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 61/93] clocksource/drivers/versatile: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 62/93] clocksource/drivers/vf_pit_timer: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 63/93] clocksource/drivers/vt8500: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 64/93] clocksource/drivers/zevio: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 65/93] clocksource/drivers/microblaze: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 66/93] clocksource/drivers/ralink: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 67/93] clocksource/drivers/nios2: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 68/93] clocksource/drivers/smp_twd: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 69/93] clocksource/drivers/nps: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 70/93] clocksource/drivers/arc: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 71/93] clocksource/drivers/oxnas-rps: " Daniel Lezcano
2016-07-07 8:01 ` [PATCH 72/93] clocksources: Switch back to the clksrc table Daniel Lezcano
2016-07-07 8:01 ` [PATCH 73/93] clk: Add missing clk_get_sys() stub Daniel Lezcano
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