From: Hans-Joachim Picht <hpicht@redhat.com>
Date: Tue, 22 Sep 2009 22:14:57 +0200
Subject: [s390] iucv: fix output register in iucv_query_maxconn
Message-id: 20090922201457.GD32244@blc4eb509856389.ibm.com
O-Subject: [RHEL5 U5 PATCH 1/1] s390 - iucv: use correct output register in iucv_query_maxconn()
Bugzilla: 524251
RH-Acked-by: Pete Zaitcev <zaitcev@redhat.com>
RH-Acked-by: Jiri Olsa <jolsa@redhat.com>

Description
===========
When querying the maximum number of iucv connections, the
wrong output register is used.

As result, kernel messages are logged reporting that the
iucv "pathid" is greater than "max_connections".

To solve this problem, use the correct output register when
querying the maximum number of IUCV connections.

Bugzilla
========

BZ 524251
https://bugzilla.redhat.com/show_bug.cgi?id=524251

Upstream status of the patch
============================

The patch will be upstream as of kernel version 2.6.32

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b29e4da41eb1114080b06dce31326d5a0e96a15

Test status
===========

The patch has been tested and fixes the problem.
The fix has been verified by the IBM test department.

Please ACK.

With best regards,

	Hans

diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index b14e081..516acd2 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -332,7 +332,7 @@ static int iucv_query_maxconn(void)
 		"	srl	%0,28\n"
 		: "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc");
 	if (ccode == 0)
-		iucv_max_pathid = reg0;
+		iucv_max_pathid = reg1;
 	kfree(param);
 	return ccode ? -EPERM : 0;
 }