net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_all()
mlx4_en_dcbnl_set_all() returns u8, so return value can't be negative in case of failure. Fixes: af7d5185 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands") Signed-off-by: Kamal Heib <kamalh@mellanox.com> Signed-off-by: Rana Shahout <ranas@mellanox.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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