[xen staging] IOREQ: fix waiting for broadcast completion

[patchbot@xxxxxxx]

commit da20c93108226cb2eb2ed1a13225337f2318a642
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Feb 4 14:01:21 2021 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 4 14:01:21 2021 +0100

    IOREQ: fix waiting for broadcast completion
    
    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>
    Reviewed-by: Paul Durrant <paul@xxxxxxx>
---
 xen/common/ioreq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/common/ioreq.c b/xen/common/ioreq.c
index 90ed2e0302..5b603c0520 100644
--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -213,9 +213,9 @@ bool vcpu_ioreq_handle_completion(struct vcpu *v)
         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;
--
generated by git-patchbot for /home/xen/git/xen.git#staging