Subject: [patch 2/2] qeth: avoid qeth recovery problems

From: [email-masked]
Date: Fri, 19 Sep 2008 12:56:03 +0200

From: Ursula Braun <[email-masked]>

Do not touch IFF_UP flag during qeth recovery, but invoke dev_close()
in case of failing recovery.
Cancel outstanding control commands in case of Data Checks or
Channel Checks.
Do not invoke qeth_l2_del_all_mc() in case of a hard stop to speed up
removal of qeth devices.

Signed-off-by: Ursula Braun <[email-masked]>
Signed-off-by: Frank Blaschka <[email-masked]>
---

 drivers/s390/net/qeth_core_main.c |    4 +++-
 drivers/s390/net/qeth_l2_main.c   |   11 +++++++----
 drivers/s390/net/qeth_l3_main.c   |    8 +++++---
 3 files changed, 15 insertions(+), 8 deletions(-)

Index: git_linus/drivers/s390/net/qeth_core_main.c
===================================================================
--- git_linus.orig/drivers/s390/net/qeth_core_main.c	2008-09-17 13:46:00.000000000 +0200
+++ git_linus/drivers/s390/net/qeth_core_main.c	2008-09-19 11:08:55.000000000 +0200
@@ -760,7 +760,7 @@
 		if (sense[SENSE_COMMAND_REJECT_BYTE] &
 		    SENSE_COMMAND_REJECT_FLAG) {
 			QETH_DBF_TEXT(TRACE, 2, "CMDREJi");
-			return 0;
+			return 1;
 		}
 		if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 			QETH_DBF_TEXT(TRACE, 2, "AFFE");
@@ -884,6 +884,7 @@
 		}
 		rc = qeth_get_problem(cdev, irb);
 		if (rc) {
+			qeth_clear_ipacmd_list(card);
 			qeth_schedule_recovery(card);
 			goto out;
 		}
@@ -4147,6 +4148,7 @@
 	unsigned long flags;
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 
+	QETH_DBF_TEXT(SETUP, 2, "removedv");
 	if (card->discipline.ccwgdriver) {
 		card->discipline.ccwgdriver->remove(gdev);
 		qeth_core_free_discipline(card);
Index: git_linus/drivers/s390/net/qeth_l2_main.c
===================================================================
--- git_linus.orig/drivers/s390/net/qeth_l2_main.c	2008-09-19 11:08:36.000000000 +0200
+++ git_linus/drivers/s390/net/qeth_l2_main.c	2008-09-19 11:08:55.000000000 +0200
@@ -395,7 +395,8 @@
 	}
 	if (card->state == CARD_STATE_SOFTSETUP) {
 		qeth_l2_process_vlans(card, 1);
-		qeth_l2_del_all_mc(card);
+		if (!card->use_hard_stop)
+			qeth_l2_del_all_mc(card);
 		qeth_clear_ipacmd_list(card);
 		card->state = CARD_STATE_HARDSETUP;
 	}
@@ -826,7 +827,6 @@
 	}
 	card->data.state = CH_STATE_UP;
 	card->state = CARD_STATE_UP;
-	card->dev->flags |= IFF_UP;
 	netif_start_queue(dev);
 
 	if (!card->lan_online && netif_carrier_ok(dev))
@@ -841,7 +841,6 @@
 
 	QETH_DBF_TEXT(TRACE, 4, "qethstop");
 	netif_tx_disable(dev);
-	card->dev->flags &= ~IFF_UP;
 	if (card->state == CARD_STATE_UP)
 		card->state = CARD_STATE_SOFTSETUP;
 	return 0;
@@ -1138,9 +1137,13 @@
 	if (!rc)
 		PRINT_INFO("Device %s successfully recovered!\n",
 			   CARD_BUS_ID(card));
-	else
+	else {
+		rtnl_lock();
+		dev_close(card->dev);
+		rtnl_unlock();
 		PRINT_INFO("Device %s could not be recovered!\n",
 			   CARD_BUS_ID(card));
+	}
 	return 0;
 }
 
Index: git_linus/drivers/s390/net/qeth_l3_main.c
===================================================================
--- git_linus.orig/drivers/s390/net/qeth_l3_main.c	2008-09-17 13:46:00.000000000 +0200
+++ git_linus/drivers/s390/net/qeth_l3_main.c	2008-09-19 11:08:55.000000000 +0200
@@ -2795,7 +2795,6 @@
 		return -ENODEV;
 	card->data.state = CH_STATE_UP;
 	card->state = CARD_STATE_UP;
-	card->dev->flags |= IFF_UP;
 	netif_start_queue(dev);
 
 	if (!card->lan_online && netif_carrier_ok(dev))
@@ -2809,7 +2808,6 @@
 
 	QETH_DBF_TEXT(TRACE, 4, "qethstop");
 	netif_tx_disable(dev);
-	card->dev->flags &= ~IFF_UP;
 	if (card->state == CARD_STATE_UP)
 		card->state = CARD_STATE_SOFTSETUP;
 	return 0;
@@ -3218,9 +3216,13 @@
 	if (!rc)
 		PRINT_INFO("Device %s successfully recovered!\n",
 			   CARD_BUS_ID(card));
-	else
+	else {
+		rtnl_lock();
+		dev_close(card->dev);
+		rtnl_unlock();
 		PRINT_INFO("Device %s could not be recovered!\n",
 			   CARD_BUS_ID(card));
+	}
 	return 0;
 }

--