From: Constantine Shulyupin <const@xxxxxxxxxxxxx>
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.
--
Changelog:
-- Fixed accordinly feedback of Oliver Neukum oneukum@xxxxxxx: also need to drop the lock.
Signed-off-by: Constantine Shulyupin <const@xxxxxxxxxxxxx>
---
drivers/usb/usb-skeleton.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 0616f23..2025d03 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -113,8 +113,9 @@ 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);
+ }
/* save our object in the file's private structure */
file->private_data = dev;
--
1.7.9.5
--
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