[PATCH v2 1/2] IOREQ: fix waiting for broadcast completion

[Jan Beulich <jbeulich@xxxxxxxx>]

Checking just a single server is not enough - all of them must have
signaled that they're done processing the request.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v2: New.

--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -213,9 +213,9 @@ bool vcpu_ioreq_handle_completion(struct
         return false;
     }
 
-    sv = get_pending_vcpu(v, &s);
-    if ( sv && !wait_for_io(sv, get_ioreq(s, v)) )
-        return false;
+    while ( (sv = get_pending_vcpu(v, &s)) != NULL )
+        if ( !wait_for_io(sv, get_ioreq(s, v)) )
+            return false;
 
     vio->req.state = ioreq_needs_completion(&vio->req) ?
         STATE_IORESP_READY : STATE_IOREQ_NONE;