[xen stable-4.16] ioreq_broadcast(): accept partial broadcast success

[patchbot@xxxxxxx]

commit f2edbd79f5d5ce3b633885469852e1215dc0d4b5
Author:     Per Bilse <per.bilse@xxxxxxxxxx>
AuthorDate: Tue Dec 20 13:50:47 2022 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Dec 20 13:50:47 2022 +0100

    ioreq_broadcast(): accept partial broadcast success
    
    Avoid incorrectly triggering an error when a broadcast buffered ioreq
    is not handled by all registered clients, as long as the failure is
    strictly because the client doesn't handle buffered ioreqs.
    
    Signed-off-by: Per Bilse <per.bilse@xxxxxxxxxx>
    Reviewed-by: Paul Durrant <paul@xxxxxxx>
    master commit: a44734df6c24fadbdb001f051cc5580c467caf7d
    master date: 2022-12-07 12:17:30 +0100
---
 xen/common/ioreq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/common/ioreq.c b/xen/common/ioreq.c
index 42414b750b..2a8d8de2d5 100644
--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -1322,7 +1322,8 @@ unsigned int ioreq_broadcast(ioreq_t *p, bool buffered)
 
     FOR_EACH_IOREQ_SERVER(d, id, s)
     {
-        if ( !s->enabled )
+        if ( !s->enabled ||
+             (buffered && s->bufioreq_handling == HVM_IOREQSRV_BUFIOREQ_OFF) )
             continue;
 
         if ( ioreq_send(s, p, buffered) == IOREQ_STATUS_UNHANDLED )
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.16