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yaml --- r: 137705 b: refs/heads/master c: f5360bd h: refs/heads/master i: 137703: 6a312cb v: v3
git-mirror · Mar 30, 2009 · 96c466b · 96c466b
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diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6ca187abb2fc1a52b2a8e0422f3ffce2e3bb7ad0
+refs/heads/master: f5360bdc5539ccd7644df7acf27e8c740ba8cf6e
diff --git a/trunk/Documentation/video4linux/v4l2-framework.txt b/trunk/Documentation/video4linux/v4l2-framework.txt
@@ -340,6 +340,12 @@ Make sure to call v4l2_device_unregister_subdev(sd) when the remove() callback
 is called. This will unregister the sub-device from the bridge driver. It is
 safe to call this even if the sub-device was never registered.
 
+You need to do this because when the bridge driver destroys the i2c adapter
+the remove() callbacks are called of the i2c devices on that adapter.
+After that the corresponding v4l2_subdev structures are invalid, so they
+have to be unregistered first. Calling v4l2_device_unregister_subdev(sd)
+from the remove() callback ensures that this is always done correctly.
+
 
 The bridge driver also has some helper functions it can use: