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Johan Hovold 0eb8c11598 greybus: operation: fix response-cancellation race 
Make sure the request handler has submitted the response before
cancelling it during operation cancellation.

This prevents cancelling not-yet-submitted messages. It currently also
avoids us ending up with an active message on a stalled connection (e.g.
due to E2EFC).

Note that the call to gb_operation_result_set() is now redundant but is
kept as a precaution to guarantee that a response has indeed been
allocated as part of response submission.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
History 2015-07-15 12:39:13 -07:00
drivers/staging/greybus greybus: operation: fix response-cancellation race 2015-07-15 12:39:13 -07:00