[PATCH 55/93] clocksource/drivers/keystone: Convert init function to return error
From: Daniel Lezcano <hidden>
Date: 2016-07-07 08:04:36
Also in:
lkml
Subsystem:
arm/texas instrument keystone clocksource, clocksource, clockevent drivers, the rest · Maintainers:
Santosh Shilimkar, Daniel Lezcano, Thomas Gleixner, Linus Torvalds
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 <redacted>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
---
drivers/clocksource/timer-keystone.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/clocksource/timer-keystone.c b/drivers/clocksource/timer-keystone.c
index 1cea08c..4199823 100644
--- a/drivers/clocksource/timer-keystone.c
+++ b/drivers/clocksource/timer-keystone.c@@ -144,7 +144,7 @@ static int keystone_set_periodic(struct clock_event_device *evt) return 0; } -static void __init keystone_timer_init(struct device_node *np) +static int __init keystone_timer_init(struct device_node *np) { struct clock_event_device *event_dev = &timer.event_dev; unsigned long rate;
@@ -154,20 +154,20 @@ static void __init keystone_timer_init(struct device_node *np) irq = irq_of_parse_and_map(np, 0); if (!irq) { pr_err("%s: failed to map interrupts\n", __func__); - return; + return -EINVAL; } timer.base = of_iomap(np, 0); if (!timer.base) { pr_err("%s: failed to map registers\n", __func__); - return; + return -ENXIO; } clk = of_clk_get(np, 0); if (IS_ERR(clk)) { pr_err("%s: failed to get clock\n", __func__); iounmap(timer.base); - return; + return PTR_ERR(clk); } error = clk_prepare_enable(clk);
@@ -219,11 +219,12 @@ static void __init keystone_timer_init(struct device_node *np) clockevents_config_and_register(event_dev, rate, 1, ULONG_MAX); pr_info("keystone timer clock @%lu Hz\n", rate); - return; + return 0; err: clk_put(clk); iounmap(timer.base); + return error; } -CLOCKSOURCE_OF_DECLARE(keystone_timer, "ti,keystone-timer", - keystone_timer_init); +CLOCKSOURCE_OF_DECLARE_RET(keystone_timer, "ti,keystone-timer", + keystone_timer_init);
--
1.9.1