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clocksource/drivers/mtk_timer: 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@linaro.org>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Daniel Lezcano 2016-05-31 17:43:47 +02:00
parent 8bdd5a2e7c
commit d64e24ce5f
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/clocksource/mtk_timer.c
View File

@ -181,7 +181,7 @@ static void mtk_timer_enable_irq(struct mtk_clock_event_device *evt, u8 timer)
evt->gpt_base + GPT_IRQ_EN_REG);
}
static void __init mtk_timer_init(struct device_node *node)
static int __init mtk_timer_init(struct device_node *node)
{
struct mtk_clock_event_device *evt;
struct resource res;
@ -190,7 +190,7 @@ static void __init mtk_timer_init(struct device_node *node)
evt = kzalloc(sizeof(*evt), GFP_KERNEL);
if (!evt)
return;
return -ENOMEM;
evt->dev.name = "mtk_tick";
evt->dev.rating = 300;
@ -248,7 +248,7 @@ static void __init mtk_timer_init(struct device_node *node)
mtk_timer_enable_irq(evt, GPT_CLK_EVT);
return;
return 0;
err_clk_disable:
clk_disable_unprepare(clk);
@ -262,5 +262,7 @@ err_mem:
release_mem_region(res.start, resource_size(&res));
err_kzalloc:
kfree(evt);
return -EINVAL;
}
CLOCKSOURCE_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_timer_init);
CLOCKSOURCE_OF_DECLARE_RET(mtk_mt6577, "mediatek,mt6577-timer", mtk_timer_init);