[Bug 734098] gst_element_set_state blocked when plugout a usb audio device

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734098
  GStreamer | gst-plugins-good | 1.x

--- Comment #3 from Yongjian Xu <hustxyj at sina.com> 2014-08-20 00:27:47 UTC ---
(In reply to comment #1)
> Why would GetStatus() still succeed? What is the return value that is returned
> by GetCurrentPosition() when the device is removed?

I'm sorry that I forgot what the return value was. And I don't have any usb
audio device at hand now.
No matter what the return value was, the code should not be written like that,
each return value should be treated respectively.

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