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authorDinh Nguyen <dinguyen@kernel.org>2021-03-22 07:18:44 -0500
committerDaniel Lezcano <daniel.lezcano@linaro.org>2021-04-08 13:24:53 +0200
commit397dc6f7ca3c858dc95800f299357311ccf679e6 (patch)
tree1de07a84ed0dca92f02cdf82cc5a74aa39cc672d /drivers/clocksource
parent690daddcb60246d8a510aaad7b954bcc53eba17e (diff)
clocksource/drivers/dw_apb_timer_of: Add handling for potential memory leak
Add calls to disable the clock and unmap the timer base address in case of any failures. Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20210322121844.2271041-1-dinguyen@kernel.org
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/dw_apb_timer_of.c26
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c
index 2b2c3b586987..3819ef5b7098 100644
--- a/drivers/clocksource/dw_apb_timer_of.c
+++ b/drivers/clocksource/dw_apb_timer_of.c
@@ -52,18 +52,34 @@ static int __init timer_get_base_and_rate(struct device_node *np,
return 0;
timer_clk = of_clk_get_by_name(np, "timer");
- if (IS_ERR(timer_clk))
- return PTR_ERR(timer_clk);
+ if (IS_ERR(timer_clk)) {
+ ret = PTR_ERR(timer_clk);
+ goto out_pclk_disable;
+ }
ret = clk_prepare_enable(timer_clk);
if (ret)
- return ret;
+ goto out_timer_clk_put;
*rate = clk_get_rate(timer_clk);
- if (!(*rate))
- return -EINVAL;
+ if (!(*rate)) {
+ ret = -EINVAL;
+ goto out_timer_clk_disable;
+ }
return 0;
+
+out_timer_clk_disable:
+ clk_disable_unprepare(timer_clk);
+out_timer_clk_put:
+ clk_put(timer_clk);
+out_pclk_disable:
+ if (!IS_ERR(pclk)) {
+ clk_disable_unprepare(pclk);
+ clk_put(pclk);
+ }
+ iounmap(*base);
+ return ret;
}
static int __init add_clockevent(struct device_node *event_timer)