---

yaml --- r: 354343 b: refs/heads/master c: de06d7c h: refs/heads/master i: 354341: f6b7d24 354339: 11be97d 354335: 102c541 v: v3
git-mirror · Feb 4, 2013 · 4812a07 · 4812a07
1 parent dfa6324
commit 4812a07
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Showing 2 changed files with 12 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: da71751177f35f0ca5494968cc237511c423a744
+refs/heads/master: de06d7c6b8e3b886eec0302ecbadf76944a42ca4
diff --git a/trunk/drivers/staging/comedi/drivers.c b/trunk/drivers/staging/comedi/drivers.c
@@ -45,14 +45,21 @@ struct comedi_driver *comedi_drivers;
 
 int comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev)
 {
-	struct device *old_hw_dev = dev->hw_dev;
-
+	if (hw_dev == dev->hw_dev)
+		return 0;
+	if (dev->hw_dev != NULL)
+		return -EEXIST;
 	dev->hw_dev = get_device(hw_dev);
-	put_device(old_hw_dev);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(comedi_set_hw_dev);
 
+static void comedi_clear_hw_dev(struct comedi_device *dev)
+{
+	put_device(dev->hw_dev);
+	dev->hw_dev = NULL;
+}
+
 int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
 {
 	struct comedi_subdevice *s;
@@ -108,7 +115,7 @@ static void cleanup_device(struct comedi_device *dev)
 	dev->write_subdev = NULL;
 	dev->open = NULL;
 	dev->close = NULL;
-	comedi_set_hw_dev(dev, NULL);
+	comedi_clear_hw_dev(dev);
 }
 
 static void __comedi_device_detach(struct comedi_device *dev)