Function skel_open increments usage count for the device with kref_get and the usage count should be decremented on the function failure.

Some last changes in function skel_open and finally commit
52a7499 Revert "USB: usb-skeleton.c: fix open/disconnect race"
introduced a bug in function skel_open, which this patch fixes.

Signed-off-by: Constantine Shulyupin <co...@MakeLinux.com>
---
 drivers/usb/usb-skeleton.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 0616f23..027005b 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -113,8 +113,10 @@ static int skel_open(struct inode *inode, struct file *file)
        mutex_lock(&dev->io_mutex);

        retval = usb_autopm_get_interface(interface);
-       if (retval)
-               goto out_err;
+       if (retval) {
+               kref_put(&dev->kref, skel_delete);
+               goto exit;
+       }

        /* save our object in the file's private structure */
        file->private_data = dev;
--
1.7.9.5

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