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fe71b5f387
Make the code that processes upcall responses more straightforward, uncovered at least one bad assumption. We trusted that vc_inuse would be 0 when upcalls are aborted, however the device may have been reopened. Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>