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[for-2.7,1/3] s390x/css: copy CCW format bit from ORB to SCSW

Message ID 20160718140913.6304-2-cornelia.huck@de.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Cornelia Huck July 18, 2016, 2:09 p.m. UTC 
From: Sascha Silbe <silbe@linux.vnet.ibm.com>

The CCW Format (F) flag of the Subchannel-Status Word (SCSW) indicates
the format of the CCWs "associated with an I/O operation", i.e. the
value of CCW-Format Control (F) bit of the Operation-Request Block
(ORB).

Copy the CCW format bit from the ORB to the SCSW so we correctly
indicate the format of the CCWs to the guest.

Signed-off-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 hw/s390x/css.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index aa61773..9e98f50 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -524,6 +524,7 @@  static void sch_handle_start_func(SubchDev *sch, ORB *orb)
             return;
         }
         sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT);
+        s->flags |= (sch->ccw_fmt_1) ? SCSW_FLAGS_MASK_FMT : 0;
         sch->ccw_no_data_cnt = 0;
         suspend_allowed = !!(orb->ctrl0 & ORB_CTRL0_MASK_SPND);
     } else {