`usbduxfast_detach()` is the Comedi "detach" handler for the usbduxfast
driver. When it is called, the private data for the device is about to
be freed. The private date contains a mutex `devpriv->mut` that was
initialized when the private data was allocated. Call `mutex_destroy()`
to mark it as invalid.
The calls to `mutex_lock()` and `mutex_unlock()` in
`usbduxfast_detach()` are probably not required, especially as the mutex
is about to be destroyed, but leave them alone for now.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/staging/comedi/drivers/usbduxfast.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index 0d54f394dbd2..04bc488385e6 100644
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -993,6 +993,8 @@ static void usbduxfast_detach(struct comedi_device *dev)
kfree(devpriv->duxbuf);
mutex_unlock(&devpriv->mut);
+
+ mutex_destroy(&devpriv->mut);
}
static struct comedi_driver usbduxfast_driver = {
--
2.20.1
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