s390/qeth: clean up CREATE_ADDR cmd code

Properly define the cmd's struct to get rid of some casts and accesses
at magic offsets.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_core_mpc.h

@@ -550,8 +550,9 @@ struct qeth_ipacmd_setadpparms {
 
 /* CREATE_ADDR IPA Command:    ***********************************************/
 struct qeth_create_destroy_address {
-	__u8 unique_id[8];
-} __attribute__ ((packed));
+	u8 mac_addr[ETH_ALEN];
+	u16 uid;
+};
 
 /* SET DIAGNOSTIC ASSIST IPA Command:	 *************************************/
 

drivers/s390/net/qeth_l3_main.c

@@ -922,7 +922,7 @@ static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 		return -EIO;
 
 	ether_addr_copy(card->dev->dev_addr,
-			cmd->data.create_destroy_addr.unique_id);
+			cmd->data.create_destroy_addr.mac_addr);
 	return 0;
 }
 
@@ -949,8 +949,7 @@ static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 
 	if (cmd->hdr.return_code == 0) {
-		card->info.unique_id = *((__u16 *)
-				&cmd->data.create_destroy_addr.unique_id[6]);
+		card->info.unique_id = cmd->data.create_destroy_addr.uid;
 		return 0;
 	}
 
@@ -964,7 +963,6 @@ static int qeth_l3_get_unique_id(struct qeth_card *card)
 {
 	int rc = 0;
 	struct qeth_cmd_buffer *iob;
-	struct qeth_ipa_cmd *cmd;
 
 	QETH_CARD_TEXT(card, 2, "guniqeid");
 
@@ -978,10 +976,8 @@ static int qeth_l3_get_unique_id(struct qeth_card *card)
 				 IPA_DATA_SIZEOF(create_destroy_addr));
 	if (!iob)
 		return -ENOMEM;
-	cmd = __ipa_cmd(iob);
-	*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
-			card->info.unique_id;
 
+	__ipa_cmd(iob)->data.create_destroy_addr.uid = card->info.unique_id;
 	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
 	return rc;
 }