dm table: fix DAX iterate_devices based device capability checks
commit 5b0fab50 upstream. Fix dm_table_supports_dax() and invert logic of both iterate_devices_callout_fn so that all devices' DAX capabilities are properly checked. Fixes: 545ed20e ("dm: add infrastructure for DAX support") Cc: stable@vger.kernel.org Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> [jeffle: no dax synchronous] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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