From: Stefan Weinhuber <wein@de.ibm.com>
Date: Wed, 24 Mar 2010 10:49:53 +0000 (+0100)
Subject: [S390] dasd: fix alignment of transport mode recovery TCW
X-Git-Tag: v2.6.34-rc3~45^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a31ba57cae853ce1ac00a22c0f5d80bd36685ed;p=profile%2Fcommon%2Fkernel-common.git

[S390] dasd: fix alignment of transport mode recovery TCW

All TCWs need to be aligned on a 64 byte boundary or the I/O will be
rejected. For recovery requests we create fresh TCWs, so we need to
do the proper alignment here as well.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 51224f7..b3736b8 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -2287,7 +2287,8 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
 
 	if (cqr->cpmode == 1) {
 		cplength = 0;
-		datasize = sizeof(struct tcw) + sizeof(struct tsb);
+		/* TCW needs to be 64 byte aligned, so leave enough room */
+		datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
 	} else {
 		cplength = 2;
 		datasize = 0;
@@ -2316,8 +2317,8 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
 	if (cqr->cpmode == 1) {
 		/* make a shallow copy of the original tcw but set new tsb */
 		erp->cpmode = 1;
-		erp->cpaddr = erp->data;
-		tcw = erp->data;
+		erp->cpaddr = PTR_ALIGN(erp->data, 64);
+		tcw = erp->cpaddr;
 		tsb = (struct tsb *) &tcw[1];
 		*tcw = *((struct tcw *)cqr->cpaddr);
 		tcw->tsb = (long)tsb;