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Subject[PATCH V2 51/63] clocksource/drivers/versatile: Convert init function to return error
Date
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>
---
drivers/clocksource/versatile.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/versatile.c b/drivers/clocksource/versatile.c
index 0a26d3d..8daeffa 100644
--- a/drivers/clocksource/versatile.c
+++ b/drivers/clocksource/versatile.c
@@ -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);
--
1.9.1
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