980f4568fa
As follow-up to commit 0cd6783d3c7d ("s390/qeth: check dst entry before use"), consolidate the dst_check() logic into a single helper and add a wrapper around the cast type selection. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>