[PATCH] clocksource: timer-prima2: Unmap region and unprepare clk obtained by of_iomap/clk_prepare_enable

[Arvind Yadav]

In case of error at init time, rollback iomapping and unprepare clk.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/clocksource/timer-prima2.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-prima2.c 
b/drivers/clocksource/timer-prima2.c
index b4122ed..46d40b3 100644
--- a/drivers/clocksource/timer-prima2.c
+++ b/drivers/clocksource/timer-prima2.c
@@ -210,13 +210,15 @@ static int __init sirfsoc_prima2_timer_init(struct 
device_node *np)
 
        if (rate < PRIMA2_CLOCK_FREQ || rate % PRIMA2_CLOCK_FREQ) {
                pr_err("Invalid clock rate\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto err_unprepare;
        }
 
        sirfsoc_timer_base = of_iomap(np, 0);
        if (!sirfsoc_timer_base) {
                pr_err("unable to map timer cpu registers\n");
-               return -ENXIO;
+               ret = -ENXIO;
+               goto err_unprepare;
        }
 
        sirfsoc_timer_irq.irq = irq_of_parse_and_map(np, 0);
@@ -230,7 +232,7 @@ static int __init sirfsoc_prima2_timer_init(struct 
device_node *np)
        ret = clocksource_register_hz(&sirfsoc_clocksource, PRIMA2_CLOCK_FREQ);
        if (ret) {
                pr_err("Failed to register clocksource\n");
-               return ret;
+               goto err_iounmap;
        }
 
        sched_clock_register(sirfsoc_read_sched_clock, 64, PRIMA2_CLOCK_FREQ);
@@ -238,12 +240,18 @@ static int __init sirfsoc_prima2_timer_init(struct 
device_node *np)
        ret = setup_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq);
        if (ret) {
                pr_err("Failed to setup irq\n");
-               return ret;
+               goto err_iounmap;
        }
 
        sirfsoc_clockevent_init();
 
        return 0;
+
+err_iounmap:
+       iounmap(sirfsoc_timer_base);
+err_unprepare:
+       clk_disable_unprepare(clk);
+       return ret;
 }
 CLOCKSOURCE_OF_DECLARE(sirfsoc_prima2_timer,
        "sirf,prima2-tick", sirfsoc_prima2_timer_init);
-- 
1.9.1