@@ -117,11 +117,13 @@ static int systick_set_oneshot(struct clock_event_device *evt)
return 0;
}
-static void __init ralink_systick_init(struct device_node *np)
+static int __init ralink_systick_init(struct device_node *np)
{
+ int ret;
+
systick.membase = of_iomap(np, 0);
if (!systick.membase)
- return;
+ return -ENXIO;
systick_irqaction.name = np->name;
systick.dev.name = np->name;
@@ -131,16 +133,21 @@ static void __init ralink_systick_init(struct device_node *np)
systick.dev.irq = irq_of_parse_and_map(np, 0);
if (!systick.dev.irq) {
pr_err("%s: request_irq failed", np->name);
- return;
+ return -EINVAL;
}
- clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
- SYSTICK_FREQ, 301, 16, clocksource_mmio_readl_up);
+ ret = clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
+ SYSTICK_FREQ, 301, 16,
+ clocksource_mmio_readl_up);
+ if (ret)
+ return ret;
clockevents_register_device(&systick.dev);
pr_info("%s: running - mult: %d, shift: %d\n",
np->name, systick.dev.mult, systick.dev.shift);
+
+ return 0;
}
-CLOCKSOURCE_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init);
+CLOCKSOURCE_OF_DECLARE_RET(systick, "ralink,cevt-systick", ralink_systick_init);
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> --- arch/mips/ralink/cevt-rt3352.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) -- 1.9.1