[ Upstream commit9ae4f8420e] If "interface" is NULL then we can't release it and trying to will only lead to an Oops. Fixes:aea71a0249("[SCSI] bnx2fc: Introduce interface structure for each vlan interface") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>