s390/qeth: reduce 0-initializing when building IPA cmds

qeth_get_ipacmd_buffer() obtains its buffers for building IPA cmds from
__qeth_get_buffer(), where they are fully cleared. So get rid of all the
additional zero-ing in various other places.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_core_main.c

@@ -780,7 +780,6 @@ void qeth_release_buffer(struct qeth_channel *channel,
 
 	QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 	spin_lock_irqsave(&channel->iob_lock, flags);
-	memset(iob->data, 0, QETH_BUFSIZE);
 	iob->state = BUF_STATE_FREE;
 	iob->callback = qeth_send_control_data_cb;
 	iob->rc = 0;
@@ -1334,8 +1333,8 @@ static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
 		return 0;
 
 	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
-		channel->iob[cnt].data =
-			kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
+		channel->iob[cnt].data = kmalloc(QETH_BUFSIZE,
+						 GFP_KERNEL | GFP_DMA);
 		if (channel->iob[cnt].data == NULL)
 			break;
 		channel->iob[cnt].state = BUF_STATE_FREE;
@@ -2888,10 +2887,10 @@ static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
 }
 
 static void qeth_fill_ipacmd_header(struct qeth_card *card,
-		struct qeth_ipa_cmd *cmd, __u8 command,
+				    struct qeth_ipa_cmd *cmd,
+				    enum qeth_ipa_cmds command,
 				    enum qeth_prot_versions prot)
 {
-	memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
 	cmd->hdr.command = command;
 	cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
 	/* cmd->hdr.seqno is set by qeth_send_control_data() */
@@ -2903,8 +2902,6 @@ static void qeth_fill_ipacmd_header(struct qeth_card *card,
 		cmd->hdr.prim_version_no = 1;
 	cmd->hdr.param_count = 1;
 	cmd->hdr.prot_version = prot;
-	cmd->hdr.ipa_supported = 0;
-	cmd->hdr.ipa_enabled = 0;
 }
 
 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
@@ -5494,8 +5491,6 @@ struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
 		cmd->data.setassparms.hdr.assist_no = ipa_func;
 		cmd->data.setassparms.hdr.length = 8 + len;
 		cmd->data.setassparms.hdr.command_code = cmd_code;
-		cmd->data.setassparms.hdr.return_code = 0;
-		cmd->data.setassparms.hdr.seq_no = 0;
 	}
 
 	return iob;