clocksource/drivers/rockchip: Add err handle for rk_timer_init

Currently rockchip_timer doesn't do some basic cleanup work when
failing to init the timer. Let's add err handle routine to deal
with all the err cases.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c
index 8c77a529d0d445bb91583f3256e7fdc4a6da6caf..b991b288c8032740f4eb0a0a4a30d056fcbb6694 100644 (file)
--- a/drivers/clocksource/rockchip_timer.c
+++ b/drivers/clocksource/rockchip_timer.c
@@ -122,23 +122,23 @@ static void __init rk_timer_init(struct device_node *np)
        pclk = of_clk_get_by_name(np, "pclk");
        if (IS_ERR(pclk)) {
                pr_err("Failed to get pclk for '%s'\n", TIMER_NAME);
-               return;
+               goto out_unmap;
        }
 
        if (clk_prepare_enable(pclk)) {
                pr_err("Failed to enable pclk for '%s'\n", TIMER_NAME);
-               return;
+               goto out_unmap;
        }
 
        timer_clk = of_clk_get_by_name(np, "timer");
        if (IS_ERR(timer_clk)) {
                pr_err("Failed to get timer clock for '%s'\n", TIMER_NAME);
-               return;
+               goto out_timer_clk;
        }
 
        if (clk_prepare_enable(timer_clk)) {
                pr_err("Failed to enable timer clock\n");
-               return;
+               goto out_timer_clk;
        }
 
        bc_timer.freq = clk_get_rate(timer_clk);
@@ -146,7 +146,7 @@ static void __init rk_timer_init(struct device_node *np)
        irq = irq_of_parse_and_map(np, 0);
        if (!irq) {
                pr_err("Failed to map interrupts for '%s'\n", TIMER_NAME);
-               return;
+               goto out_irq;
        }
 
        ce->name = TIMER_NAME;
@@ -164,10 +164,19 @@ static void __init rk_timer_init(struct device_node *np)
        ret = request_irq(irq, rk_timer_interrupt, IRQF_TIMER, TIMER_NAME, ce);
        if (ret) {
                pr_err("Failed to initialize '%s': %d\n", TIMER_NAME, ret);
-               return;
+               goto out_irq;
        }
 
        clockevents_config_and_register(ce, bc_timer.freq, 1, UINT_MAX);
+
+       return;
+
+out_irq:
+       clk_disable_unprepare(timer_clk);
+out_timer_clk:
+       clk_disable_unprepare(pclk);
+out_unmap:
+       iounmap(bc_timer.base);
 }
 
 CLOCKSOURCE_OF_DECLARE(rk_timer, "rockchip,rk3288-timer", rk_timer_init);