[PATCH] usb: cdns3: Fix rumtime PM imbalance on error

[Dinghao Liu]

When cdns3_gadget_start() fails, a pairing PM usage counter
decrement is needed to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
 drivers/usb/cdns3/cdns3-gadget.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index 582bfeceedb4..ad891a108aed 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -3255,8 +3255,11 @@ static int __cdns3_gadget_init(struct cdns *cdns)
        pm_runtime_get_sync(cdns->dev);
 
        ret = cdns3_gadget_start(cdns);
-       if (ret)
+       if (ret) {
+               pm_runtime_mark_last_busy(cdns->dev);
+               pm_runtime_put_autosuspend(cdns->dev);
                return ret;
+       }
 
        /*
         * Because interrupt line can be shared with other components in
-- 
2.17.1