Mikulas Patocka ab37844d61 dm: test return value for DM_MAPIO_SUBMITTED
In properly written code we should not assume that DM_MAPIO_SUBMITTED is
zero. We should test the return value for DM_MAPIO_SUBMITTED rather than
testing it for zero.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2015-08-12 11:32:20 -04:00
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