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Date: Tue, 28 Jun 2016 12:30:43 +0200 From: Daniel Lezcano <daniel.lezcano@...aro.org> To: daniel.lezcano@...aro.org, tglx@...utronix.de Cc: linux-kernel@...r.kernel.org, Ray Jui <ray.jui@...adcom.com>, bcm-kernel-feedback-list@...adcom.com Subject: [PATCH 24/92] clocksource/drivers/bcm_kona: Convert init function to return error 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@...aro.org> Acked-by: Ray Jui <ray.jui@...adcom.com> --- drivers/clocksource/bcm_kona_timer.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c index e717e87..c251aa6 100644 --- a/drivers/clocksource/bcm_kona_timer.c +++ b/drivers/clocksource/bcm_kona_timer.c @@ -163,16 +163,11 @@ static struct irqaction kona_timer_irq = { .handler = kona_timer_interrupt, }; -static void __init kona_timer_init(struct device_node *node) +static int __init kona_timer_init(struct device_node *node) { u32 freq; struct clk *external_clk; - if (!of_device_is_available(node)) { - pr_info("Kona Timer v1 marked as disabled in device tree\n"); - return; - } - external_clk = of_clk_get_by_name(node, NULL); if (!IS_ERR(external_clk)) { @@ -182,7 +177,7 @@ static void __init kona_timer_init(struct device_node *node) arch_timer_rate = freq; } else { pr_err("Kona Timer v1 unable to determine clock-frequency"); - return; + return -EINVAL; } /* Setup IRQ numbers */ @@ -196,11 +191,13 @@ static void __init kona_timer_init(struct device_node *node) kona_timer_clockevents_init(); setup_irq(timers.tmr_irq, &kona_timer_irq); kona_timer_set_next_event((arch_timer_rate / HZ), NULL); + + return 0; } -CLOCKSOURCE_OF_DECLARE(brcm_kona, "brcm,kona-timer", kona_timer_init); +CLOCKSOURCE_OF_DECLARE_RET(brcm_kona, "brcm,kona-timer", kona_timer_init); /* * bcm,kona-timer is deprecated by brcm,kona-timer * being kept here for driver compatibility */ -CLOCKSOURCE_OF_DECLARE(bcm_kona, "bcm,kona-timer", kona_timer_init); +CLOCKSOURCE_OF_DECLARE_RET(bcm_kona, "bcm,kona-timer", kona_timer_init); -- 1.9.1
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