Staging: comedi: das1800.c: fix a locking error on the error path.

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
index d91c2d9..de5e82f 100644 (file)
--- a/drivers/staging/comedi/drivers/das1800.c
+++ b/drivers/staging/comedi/drivers/das1800.c
@@ -1637,7 +1637,8 @@ static int das1800_ai_rinsn(struct comedi_device *dev,
                }
                if (i == timeout) {
                        comedi_error(dev, "timeout");
-                       return -ETIME;
+                       n = -ETIME;
+                       goto exit;
                }
                dpnt = inw(dev->iobase + DAS1800_FIFO);
                /* shift data to offset binary for bipolar ranges */
@@ -1645,6 +1646,7 @@ static int das1800_ai_rinsn(struct comedi_device *dev,
                        dpnt += 1 << (thisboard->resolution - 1);
                data[n] = dpnt;
        }
+exit:
        spin_unlock_irqrestore(&dev->spinlock, irq_flags);
 
        return n;