[PATCH] s390: minor qeth network driver fixes

[patch 2/3] s390: minor qeth network driver fixes

From: Frank Pavlic <pavlic@de.ibm.com>
	- use netif_carrier_on/off calls to tell network stack
	  link carrier state
	- fix possible kfree on NULL
	- PDU_LEN2 is at offset 0x29 otherwise OSN chpid won't initialize

Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>

diffstat:
 qeth_eddp.c |    3 ++-
 qeth_main.c |   17 +++++++----------
 qeth_mpc.h  |    2 +-
 3 files changed, 10 insertions(+), 12 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

3 files changed, 10 insertions, 12 deletions

diff --git a/drivers/s390/net/qeth_eddp.c b/drivers/s390/net/qeth_eddp.c
index 011915d5e24..f94f1f25eec 100644
--- a/drivers/s390/net/qeth_eddp.c
+++ b/drivers/s390/net/qeth_eddp.c
@@ -62,7 +62,8 @@ qeth_eddp_free_context(struct qeth_eddp_context *ctx)
 	for (i = 0; i < ctx->num_pages; ++i)
 		free_page((unsigned long)ctx->pages[i]);
 	kfree(ctx->pages);
-	kfree(ctx->elements);
+	if (ctx->elements != NULL)
+		kfree(ctx->elements);
 	kfree(ctx);
 }
 
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 5d2d548e542..e693dc4ce86 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -518,7 +518,8 @@ __qeth_set_offline(struct ccwgroup_device *cgdev, int recovery_mode)
 
 	QETH_DBF_TEXT(setup, 3, "setoffl");
 	QETH_DBF_HEX(setup, 3, &card, sizeof(void *));
-
+	
+	netif_carrier_off(card->dev);
 	recover_flag = card->state;
 	if (qeth_stop_card(card, recovery_mode) == -ERESTARTSYS){
 		PRINT_WARN("Stopping card %s interrupted by user!\n",
@@ -1020,7 +1021,6 @@ void
 qeth_schedule_recovery(struct qeth_card *card)
 {
 	QETH_DBF_TEXT(trace,2,"startrec");
-
 	if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 		schedule_work(&card->kernel_thread_starter);
 }
@@ -1710,7 +1710,6 @@ qeth_check_ipa_data(struct qeth_card *card, struct qeth_cmd_buffer *iob)
 					   "IP address reset.\n",
 					   QETH_CARD_IFNAME(card),
 					   card->info.chpid);
-				netif_carrier_on(card->dev);
 				qeth_schedule_recovery(card);
 				return NULL;
 			case IPA_CMD_MODCCID:
@@ -1959,7 +1958,7 @@ qeth_osn_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
 {
 	u16 s1, s2;
 
-QETH_DBF_TEXT(trace,4,"osndipa");
+	QETH_DBF_TEXT(trace,4,"osndipa");
 
 	qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
 	s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
@@ -3809,10 +3808,8 @@ qeth_open(struct net_device *dev)
 	card->data.state = CH_STATE_UP;
 	card->state = CARD_STATE_UP;
 
-	if (!card->lan_online){
-		if (netif_carrier_ok(dev))
-			netif_carrier_off(dev);
-	}
+	if (!card->lan_online && netif_carrier_ok(dev))
+		netif_carrier_off(dev);
 	return 0;
 }
 
@@ -7936,8 +7933,8 @@ __qeth_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		QETH_DBF_TEXT_(setup, 2, "6err%d", rc);
 		goto out_remove;
 	}
-/*maybe it was set offline without ifconfig down
- * we can also use this state for recovery purposes*/
+	netif_carrier_on(card->dev);
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	if (recover_flag == CARD_STATE_RECOVER)
 		qeth_start_again(card, recovery_mode);
diff --git a/drivers/s390/net/qeth_mpc.h b/drivers/s390/net/qeth_mpc.h
index 5f71486e708..00c71786e89 100644
--- a/drivers/s390/net/qeth_mpc.h
+++ b/drivers/s390/net/qeth_mpc.h
@@ -21,7 +21,7 @@ extern const char *VERSION_QETH_MPC_C;
 #define IPA_PDU_HEADER_SIZE	0x40
 #define QETH_IPA_PDU_LEN_TOTAL(buffer) (buffer+0x0e)
 #define QETH_IPA_PDU_LEN_PDU1(buffer) (buffer+0x26)
-#define QETH_IPA_PDU_LEN_PDU2(buffer) (buffer+0x2a)
+#define QETH_IPA_PDU_LEN_PDU2(buffer) (buffer+0x29)
 #define QETH_IPA_PDU_LEN_PDU3(buffer) (buffer+0x3a)
 
 extern unsigned char IPA_PDU_HEADER[];