[PATCH v2 1/1] vfio-ccw: allow non-prefetch ORBs

[Jared Rossi]

Remove the explicit prefetch check when using vfio-ccw devices.
This check does not trigger in practice as all Linux channel programs
are intended to use prefetch.

It is no longer required to force the PFCH flag when using vfio-ccw
devices.

Signed-off-by: Jared Rossi <address@hidden>
---
 hw/vfio/ccw.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 50cc2ec75c..e649377b68 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -74,16 +74,9 @@ static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
     struct ccw_io_region *region = vcdev->io_region;
     int ret;
 
-    if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH)) {
-        if (!(vcdev->force_orb_pfch)) {
-            warn_once_pfch(vcdev, sch, "requires PFCH flag set");
-            sch_gen_unit_exception(sch);
-            css_inject_io_interrupt(sch);
-            return IOINST_CC_EXPECTED;
-        } else {
-            sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
-            warn_once_pfch(vcdev, sch, "PFCH flag forced");
-        }
+    if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH) && vcdev->force_orb_pfch) {
+        sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
+        warn_once_pfch(vcdev, sch, "PFCH flag forced");
     }
 
     QEMU_BUILD_BUG_ON(sizeof(region->orb_area) != sizeof(ORB));
-- 
2.17.0