[PATCH v2] driver: uio: fix possible memory leak in uio_open

[liujian]

v1->v2:
rename the "err_infoopen" to "err_idev_info"

Fixes: 57c5f4df0a5a ("uio: fix crash after the device is unregistered")
Signed-off-by: liujian <liujia...@huawei.com>
---
 drivers/uio/uio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 5c10fc7..aab3520 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -496,18 +496,19 @@ static int uio_open(struct inode *inode, struct file 
*filep)
        if (!idev->info) {
                mutex_unlock(&idev->info_lock);
                ret = -EINVAL;
-               goto err_alloc_listener;
+               goto err_idev_info;
        }
 
        if (idev->info && idev->info->open)
                ret = idev->info->open(idev->info, inode);
        mutex_unlock(&idev->info_lock);
        if (ret)
-               goto err_infoopen;
+               goto err_idev_info;
 
        return 0;
 
-err_infoopen:
+err_idev_info:
+       filep->private_data = NULL;
        kfree(listener);
 
 err_alloc_listener:
-- 
2.7.4