From: Paul Durrant <pdurrant@amazon.com>
Date: Thu, 5 May 2022 13:57:41 +0000 (+0100)
Subject: Remove unnecessary wait when enabling interrupts
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=a532e2ecb5f3c85c359c513973ea8b4df156c0d4;p=pvdrivers%2Fwin%2Fxenbus.git

Remove unnecessary wait when enabling interrupts

There is no need for DPCs to wait: Only the main thread needs to do so.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
---

diff --git a/src/xenbus/sync.c b/src/xenbus/sync.c
index c2ef681..e3b55d1 100644
--- a/src/xenbus/sync.c
+++ b/src/xenbus/sync.c
@@ -226,12 +226,6 @@ SyncWorker(
             KeLowerIrql(DISPATCH_LEVEL);
 
             InterlockedIncrement(&Context->CompletionCount);
-
-            while (Context->CompletionCount < Context->ProcessorCount) {
-                _mm_pause();
-                KeMemoryBarrier();
-            }
-
         }
     }