Matt Johnston 71d28e5073 mctp: Fix check for dev_hard_header() result
[ Upstream commit 60be976ac45137657b7b505d7e0d44d0e51accb7 ]

dev_hard_header() returns the length of the header, so
we need to test for negative errors rather than non-zero.

Fixes: 889b7da23abf ("mctp: Add initial routing framework")
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-13 20:59:16 +02:00
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