[PATCH] input: touchscreen: fix reference leak in stmfts_input_open

[dingsenjie]

From: dingsenjie <dingsen...@yulong.com>

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in cedrus_start_streaming.

Signed-off-by: dingsenjie <dingsen...@yulong.com>
---
 drivers/input/touchscreen/stmfts.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/stmfts.c 
b/drivers/input/touchscreen/stmfts.c
index 9a64e1d..b91a59b 100644
--- a/drivers/input/touchscreen/stmfts.c
+++ b/drivers/input/touchscreen/stmfts.c
@@ -338,8 +338,10 @@ static int stmfts_input_open(struct input_dev *dev)
        int err;
 
        err = pm_runtime_get_sync(&sdata->client->dev);
-       if (err < 0)
+       if (err < 0) {
+               pm_runtime_put_noidle(&sdata->client->dev);
                return err;
+       }
 
        err = i2c_smbus_write_byte(sdata->client, STMFTS_MS_MT_SENSE_ON);
        if (err)
-- 
1.9.1