From: Carsten Otte <cotte@de.ibm.com>
Date: Thu, 22 Jul 2010 23:15:04 +0000 (+0000)
Subject: qeth: Clear mac_bits field when switching between Layer 2 and Layer 3
X-Git-Tag: v2.6.36-rc1~571^2~130
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=75e0de13631e115768a97131a2d7f5259217512d;p=profile%2Fcommon%2Fkernel-common.git

qeth: Clear mac_bits field when switching between Layer 2 and Layer 3

This patch fixes a problem that occurs when switching from layer 3 to layer 2
mode. Resetting this mac_bits makes sure that we retrieve our mac address from
the card, otherwise the interface simply would'nt work.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index 2eb022f..6b7fd88 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -433,6 +433,7 @@ static ssize_t qeth_dev_layer2_store(struct device *dev,
 	if (card->options.layer2 == newdis)
 		goto out;
 	else {
+		card->info.mac_bits  = 0;
 		if (card->discipline.ccwgdriver) {
 			card->discipline.ccwgdriver->remove(card->gdev);
 			qeth_core_free_discipline(card);