[PATCH AUTOSEL for 4.14 093/100] usb: dwc3: of-simple: fix missing clk_disable_unprepare

[Sasha Levin]

From: Andreas Platschek <andreas.platschek@xxxxxxxxxxx>

[ Upstream commit ded600ea9fb51a495d2fcd21e90351df876488e8 ]

If of_clk_get() fails, the clean-up of already initialized clocks should be
the same as when clk_prepare_enable() fails. Thus a clk_disable_unprepare()
for each clock should be called before the clk_put().

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 16adc674d0d6 ("usb: dwc3: ep0: fix setup_packet_pending initialization")

Signed-off-by: Andreas Platschek <andreas.platschek@xxxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 drivers/usb/dwc3/dwc3-of-simple.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index a26d1fde0f5e..fbfc09ebd2ec 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -57,8 +57,10 @@ static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
 
 		clk = of_clk_get(np, i);
 		if (IS_ERR(clk)) {
-			while (--i >= 0)
+			while (--i >= 0) {
+				clk_disable_unprepare(simple->clks[i]);
 				clk_put(simple->clks[i]);
+			}
 			return PTR_ERR(clk);
 		}
 
-- 
2.11.0