QCE_MAX_IV_SIZE
memset(rctx->ccm_rfc4309_iv, 0, QCE_MAX_IV_SIZE);
u8 ccm_rfc4309_iv[QCE_MAX_IV_SIZE];
__be32 enciv[QCE_MAX_IV_SIZE / sizeof(__be32)] = {0};
u32 enciv[QCE_MAX_IV_SIZE / sizeof(u32)] = {0};