[PATCH 11/13] fix kref usage in skel_open

[stefani@xxxxxxxxxxx]

From: Stefani Seibold <stefani@xxxxxxxxxxx>

Increment the kref at last, so we need no extra error path for decrement
them in a case of error..

Signed-off-by: Stefani Seibold <stefani@xxxxxxxxxxx>
---
 drivers/usb/usb-skeleton.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 0a1ab0b..551fb51 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -92,18 +92,19 @@ static int skel_open(struct inode *inode, struct file *file)
 	if (!dev)
 		return -ENODEV;
 
-	/* increment our usage count for the device */
-	kref_get(&dev->kref);
-
 	/*
 	 * must be not locked since a disconnect waits in usb_deregister_dev()
 	 * due the already locked minor_rwsem in the usb_open() function
 	 */
 	retval = usb_autopm_get_interface(interface);
+	if (!retval)
+		return retval;
+
+	/* increment our usage count for the device */
+	kref_get(&dev->kref);
 
 	/* save our object in the file's private structure */
-	if (!retval)
-		file->private_data = dev;
+	file->private_data = dev;
 
 	return retval;
 }
-- 
1.7.8.6

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