qat: avoid strict-aliasing break

To avoid GCC warning about "dereferencing type-punned pointer will break
strict-aliasing rules" aad_len pointer is dereferenced instead of direct
dereferencing of uint32_t* cast of the middle of an array.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Deepak Kumar Jain <deepak.k.jain@intel.com>

diff --git a/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c b/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
index bcccdf4..aa108d4 100644 (file)
--- a/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
+++ b/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
@@ -616,10 +616,11 @@ int qat_alg_aead_session_create_content_desc_auth(struct qat_session *cdesc,
                 * Write (the length of AAD) into bytes 16-19 of state2
                 * in big-endian format. This field is 8 bytes
                 */
-               *(uint32_t *)&(hash->sha.state1[
+               uint32_t *aad_len = (uint32_t *)&hash->sha.state1[
                                        ICP_QAT_HW_GALOIS_128_STATE1_SZ +
-                                       ICP_QAT_HW_GALOIS_H_SZ]) =
-                       rte_bswap32(add_auth_data_length);
+                                       ICP_QAT_HW_GALOIS_H_SZ];
+               *aad_len = rte_bswap32(add_auth_data_length);
+
                proto = ICP_QAT_FW_LA_GCM_PROTO;
        } else if (cdesc->qat_hash_alg == ICP_QAT_HW_AUTH_ALGO_SNOW_3G_UIA2)  {
                proto = ICP_QAT_FW_LA_SNOW_3G_PROTO;