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clocksource/drivers/versatile: Convert init function to return error

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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>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
This commit is contained in:
Daniel Lezcano 2016-06-06 23:29:30 +02:00
parent 1ee078facf
commit 86de962823
1 changed files with 6 additions and 4 deletions
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10
drivers/clocksource/versatile.c
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@ -25,18 +25,20 @@ static u64 notrace versatile_sys_24mhz_read(void)
return readl(versatile_sys_24mhz);
}
static void __init versatile_sched_clock_init(struct device_node *node)
static int __init versatile_sched_clock_init(struct device_node *node)
{
void __iomem *base = of_iomap(node, 0);
if (!base)
return;
return -ENXIO;
versatile_sys_24mhz = base + SYS_24MHZ;
sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
return 0;
}
CLOCKSOURCE_OF_DECLARE(vexpress, "arm,vexpress-sysreg",
CLOCKSOURCE_OF_DECLARE_RET(vexpress, "arm,vexpress-sysreg",
versatile_sched_clock_init);
CLOCKSOURCE_OF_DECLARE(versatile, "arm,versatile-sysreg",
CLOCKSOURCE_OF_DECLARE_RET(versatile, "arm,versatile-sysreg",
versatile_sched_clock_init);