[PATCH] rtc: Fix memleak in sun6i_rtc_clk_init

[Youling Tang]

When rtc->base or rtc->int_osc or rtc->losc or rtc->ext_losc is NULL,
we should free clk_data and rtc before the function returns to prevent
memleak.

Signed-off-by: Youling Tang <tangyoul...@loongson.cn>
---
 drivers/rtc/rtc-sun6i.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index e2b8b15..84ff1e6 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node 
*node,
                                                                300000000);
        if (IS_ERR(rtc->int_osc)) {
                pr_crit("Couldn't register the internal oscillator\n");
-               return;
+               goto err;
        }
 
        parents[0] = clk_hw_get_name(rtc->int_osc);
@@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node 
*node,
        rtc->losc = clk_register(NULL, &rtc->hw);
        if (IS_ERR(rtc->losc)) {
                pr_crit("Couldn't register the LOSC clock\n");
-               return;
+               goto err;
        }
 
        of_property_read_string_index(node, "clock-output-names", 1,
@@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node 
*node,
                                          &rtc->lock);
        if (IS_ERR(rtc->ext_losc)) {
                pr_crit("Couldn't register the LOSC external gate\n");
-               return;
+               goto err;
        }
 
        clk_data->num = 2;
@@ -316,6 +316,7 @@ static void __init sun6i_rtc_clk_init(struct device_node 
*node,
 
 err:
        kfree(clk_data);
+       kfree(rtc);
 }
 
 static const struct sun6i_rtc_clk_data sun6i_a31_rtc_data = {
-- 
2.1.0