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USB: report submission of active URBs
This patch (as1633) changes slightly the way usbcore handled submissions of URBs that are already active. It will now return -EBUSY rather than -EINVAL, and it will call WARN_ONCE to draw people's attention to the bug. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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