[PATCH] clocksource/drivers/st_lpc: Fix clock reference leaks

[Wentao Liang]

st_clksrc_setup_clk() obtains the LPC clock with of_clk_get() but
leaks the consumer reference on two error paths: the
clk_prepare_enable() failure path returns without any release, and the
clk_get_rate() == 0 path only does clk_disable_unprepare() without
clk_put().

Add the missing clk_put() calls, mirroring the release already done in
st_clksrc_of_register() error handling.

Fixes: 70bef01c0f1c ("clocksource: sti: Provide support for the ST LPC Clocksource IP")
Cc: stable at vger.kernel.org
Signed-off-by: Wentao Liang <vulab at iscas.ac.cn>
---
 drivers/clocksource/clksrc_st_lpc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
index 419a886876e4..574b966eeb34 100644
--- a/drivers/clocksource/clksrc_st_lpc.c
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -74,12 +74,14 @@ static int __init st_clksrc_setup_clk(struct device_node *np)
 
 	if (clk_prepare_enable(clk)) {
 		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		clk_put(clk);
 		return -EINVAL;
 	}
 
 	if (!clk_get_rate(clk)) {
 		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
 		clk_disable_unprepare(clk);
+		clk_put(clk);
 		return -EINVAL;
 	}
 
-- 
2.34.1