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authorDaniel Lezcano <daniel.lezcano@linaro.org>2016-06-06 17:57:38 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2016-06-28 10:19:24 +0200
commitb7357e656ca45dd57ef02f2a1be513af2b80579c (patch)
treec39e2c0de741ccf5dc19d396908c0cbd34df729c /drivers
parentd8152bf85d2c057fc39c3e20a4d623f524d9f09c (diff)
downloadlinux-b7357e656ca45dd57ef02f2a1be513af2b80579c.tar.bz2
clocksource/drivers/moxart: 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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clocksource/moxart_timer.c41
1 files changed, 27 insertions, 14 deletions
diff --git a/drivers/clocksource/moxart_timer.c b/drivers/clocksource/moxart_timer.c
index 19857af651c1..b9c30cd035bf 100644
--- a/drivers/clocksource/moxart_timer.c
+++ b/drivers/clocksource/moxart_timer.c
@@ -119,34 +119,45 @@ static struct irqaction moxart_timer_irq = {
.dev_id = &moxart_clockevent,
};
-static void __init moxart_timer_init(struct device_node *node)
+static int __init moxart_timer_init(struct device_node *node)
{
int ret, irq;
unsigned long pclk;
struct clk *clk;
base = of_iomap(node, 0);
- if (!base)
- panic("%s: of_iomap failed\n", node->full_name);
+ if (!base) {
+ pr_err("%s: of_iomap failed\n", node->full_name);
+ return -ENXIO;
+ }
irq = irq_of_parse_and_map(node, 0);
- if (irq <= 0)
- panic("%s: irq_of_parse_and_map failed\n", node->full_name);
+ if (irq <= 0) {
+ pr_err("%s: irq_of_parse_and_map failed\n", node->full_name);
+ return -EINVAL;
+ }
ret = setup_irq(irq, &moxart_timer_irq);
- if (ret)
- panic("%s: setup_irq failed\n", node->full_name);
+ if (ret) {
+ pr_err("%s: setup_irq failed\n", node->full_name);
+ return ret;
+ }
clk = of_clk_get(node, 0);
- if (IS_ERR(clk))
- panic("%s: of_clk_get failed\n", node->full_name);
+ if (IS_ERR(clk)) {
+ pr_err("%s: of_clk_get failed\n", node->full_name);
+ return PTR_ERR(clk);
+ }
pclk = clk_get_rate(clk);
- if (clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
- "moxart_timer", pclk, 200, 32,
- clocksource_mmio_readl_down))
- panic("%s: clocksource_mmio_init failed\n", node->full_name);
+ ret = clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
+ "moxart_timer", pclk, 200, 32,
+ clocksource_mmio_readl_down);
+ if (ret) {
+ pr_err("%s: clocksource_mmio_init failed\n", node->full_name);
+ return ret;
+ }
clock_count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ);
@@ -164,5 +175,7 @@ static void __init moxart_timer_init(struct device_node *node)
*/
clockevents_config_and_register(&moxart_clockevent, pclk,
0x4, 0xfffffffe);
+
+ return 0;
}
-CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", moxart_timer_init);
+CLOCKSOURCE_OF_DECLARE_RET(moxart, "moxa,moxart-timer", moxart_timer_init);