From f95ac8558b88a5e9ae2b1d580a5cc55bffa512fa Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Mon, 27 Jul 2015 15:00:13 +0100 Subject: 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. Signed-off-by: Ezequiel Garcia Reviewed-by: Andrew Bresticker Acked-by: Daniel Lezcano Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: Thomas Gleixner Cc: James Hartley Cc: Govindraj Raja Cc: Damien Horsley Cc: James Hogan Cc: Ezequiel Garcia Patchwork: https://patchwork.linux-mips.org/patch/10780/ Signed-off-by: Ralf Baechle --- drivers/clocksource/mips-gic-timer.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'drivers/clocksource') diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c index 913585d93466..c4352f078492 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(); -- cgit v1.2.1