There was a double unlock introduced in 60ff461067 ("staging: comedi:
usbduxsigma: use attach_usb() hook").
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/staging/comedi/drivers/usbduxsigma.c b/drivers/staging/comedi/drivers/usbduxsigma.c
index 28f41e9..015b0d0 100644
--- a/drivers/staging/comedi/drivers/usbduxsigma.c
+++ b/drivers/staging/comedi/drivers/usbduxsigma.c
@@ -2781,7 +2781,6 @@ static int usbduxsigma_attach(struct comedi_device *dev,
if (index < 0) {
dev_err(dev->class_dev,
"usbduxsigma: error: attach failed, dev not connected to the usb bus.\n");
- up(&start_stop_sem);
ret = -ENODEV;
} else
ret = usbduxsigma_attach_common(dev, &usbduxsub[index],
--
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