[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 @@
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 @@
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;