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Subject[PATCH] Input: stmfts: fix ref count leak in stmfts_input_open
Date
in stmfts_input_open, pm_runtime_get_sync is called which
increments the counter even in case of failure, leading to incorrect
ref count. In case of failure, decrement the ref count before returning.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
drivers/input/touchscreen/stmfts.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c
index b6f95f20f924..1ef282d7cc14 100644
--- a/drivers/input/touchscreen/stmfts.c
+++ b/drivers/input/touchscreen/stmfts.c
@@ -339,11 +339,11 @@ static int stmfts_input_open(struct input_dev *dev)

err = pm_runtime_get_sync(&sdata->client->dev);
if (err < 0)
- return err;
+ goto out;

err = i2c_smbus_write_byte(sdata->client, STMFTS_MS_MT_SENSE_ON);
if (err)
- return err;
+ goto out;

mutex_lock(&sdata->mutex);
sdata->running = true;
@@ -367,6 +367,9 @@ static int stmfts_input_open(struct input_dev *dev)
}

return 0;
+out:
+ pm_runtime_put(&sdata->client->dev);
+ return err;
}

static void stmfts_input_close(struct input_dev *dev)
--
2.17.1
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