0007-ioreq_broadcast-accept-partial-broadcast-success.patch


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From c3e37c60fbf8f8cd71db0f0846c9c7aeadf02963 Mon Sep 17 00:00:00 2001
From: Per Bilse <per.bilse@citrix.com>
Date: Tue, 20 Dec 2022 13:45:38 +0100
Subject: [PATCH 07/89] 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@citrix.com>
Reviewed-by: Paul Durrant <paul@xen.org>
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 4617aef29b..ecb8f545e1 100644
--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -1317,7 +1317,8 @@ 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 )
-- 
2.40.0