staging: comedi: dt9812: Call mutex_destroy() on private mutex
`dt9812_detach()` is the Comedi "detach" handler for the dt9812 driver. When it is called, the private data for the device is about to be freed. The private data contains a mutex `devpriv->mut` that was initialized when the private data was allocated. Call `mutex_destroy()` to mark it as invalid. Also remove the calls to `mutex_lock()` and `mutex_unlock()` from `dt9812_detach()` as the mutex is only being used around a call to `usb_set_intfdata()` to clear the USB interface's driver data pointer. The mutex lock seems redundant here, especially as it is about to be destroyed. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Showing
Please register or sign in to comment