s390/dasd: prevent incorrect length error under z/VM after PAV changes

The channel checks the specified length and the provided amount of
data for CCWs and provides an incorrect length error if the size does
not match. Under z/VM with simulation activated the length may get
changed. Having the suppress length indication bit set is stated as
good CCW coding practice and avoids errors under z/VM.

Cc: stable@vger.kernel.org
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c
index 184b1dbeb554..4ff914c0f13c 100644
--- a/drivers/s390/block/dasd_alias.c
+++ b/drivers/s390/block/dasd_alias.c
@@ -723,7 +723,7 @@ static int reset_summary_unit_check(struct alias_lcu *lcu,
         ASCEBC((char *) &cqr->magic, 4);
         ccw = cqr->cpaddr;
         ccw->cmd_code = DASD_ECKD_CCW_RSCK;
-        ccw->flags = 0 ;
+        ccw->flags = CCW_FLAG_SLI;
         ccw->count = 16;
         ccw->cda = (__u32)(addr_t) cqr->data;
         ((char *)cqr->data)[0] = reason;