linux-kernel - [PATCH v2 2/7] clocksource: mips-gic: Add missing error returns checks

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Date:	Tue, 26 May 2015 15:39:03 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...tec.com>
To:	<linux-kernel@...r.kernel.org>, <linux-mips@...ux-mips.org>,
	"Daniel Lezcano" <daniel.lezcano@...aro.org>,
	<devicetree@...r.kernel.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Bresticker <abrestic@...omium.org>,
	James Hartley <james.hartley@...tec.com>,
	<Govindraj.Raja@...tec.com>, <Damien.Horsley@...tec.com>,
	James Hogan <james.hogan@...tec.com>,
	Ezequiel Garcia <ezequiel.garcia@...tec.com>
Subject: [PATCH v2 2/7] clocksource: mips-gic: Add missing error returns checks

This commit adds the required checks on the functions that return
an error. Some of them are not critical, so only a warning is
printed.

Reviewed-by: Andrew Bresticker <abrestic@...omium.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@...tec.com>
---
 drivers/clocksource/mips-gic-timer.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index 913585d..c4352f0 100644
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -100,12 +100,18 @@ static struct notifier_block gic_cpu_nb = {
 
 static int gic_clockevent_init(void)
 {
+	int ret;
+
 	if (!cpu_has_counter || !gic_frequency)
 		return -ENXIO;
 
-	setup_percpu_irq(gic_timer_irq, &gic_compare_irqaction);
+	ret = setup_percpu_irq(gic_timer_irq, &gic_compare_irqaction);
+	if (ret < 0)
+		return ret;
 
-	register_cpu_notifier(&gic_cpu_nb);
+	ret = register_cpu_notifier(&gic_cpu_nb);
+	if (ret < 0)
+		pr_warn("GIC: Unable to register CPU notifier\n");
 
 	gic_clockevent_cpu_init(this_cpu_ptr(&gic_clockevent_device));
 
@@ -125,13 +131,17 @@ static struct clocksource gic_clocksource = {
 
 static void __init __gic_clocksource_init(void)
 {
+	int ret;
+
 	/* Set clocksource mask. */
 	gic_clocksource.mask = CLOCKSOURCE_MASK(gic_get_count_width());
 
 	/* Calculate a somewhat reasonable rating value. */
 	gic_clocksource.rating = 200 + gic_frequency / 10000000;
 
-	clocksource_register_hz(&gic_clocksource, gic_frequency);
+	ret = clocksource_register_hz(&gic_clocksource, gic_frequency);
+	if (ret < 0)
+		pr_warn("GIC: Unable to register clocksource\n");
 
 	gic_clockevent_init();
 
-- 
2.3.3

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