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Re: [PATCH] transmitter: Fix cleanup teardown in TransmitterInitialize


  • To: Tu Dinh <ngoc-tu.dinh@xxxxxxxxxx>, "win-pv-devel@xxxxxxxxxxxxxxxxxxxx" <win-pv-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Owen Smith <owen.smith@xxxxxxxxxx>
  • Date: Mon, 8 Jun 2026 09:14:30 +0000
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  • Delivery-date: Mon, 08 Jun 2026 09:14:37 +0000
  • List-id: Developer list for the Windows PV Drivers subproject <win-pv-devel.lists.xenproject.org>
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  • Thread-topic: [PATCH] transmitter: Fix cleanup teardown in TransmitterInitialize

Reviewed-by: Owen Smith <owen.smith@xxxxxxxxxx>

________________________________________
From: win-pv-devel <win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx> on behalf of Tu 
Dinh <ngoc-tu.dinh@xxxxxxxxxx>
Sent: 06 June 2026 4:35 PM
To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Cc: Tu Dinh
Subject: [PATCH] transmitter: Fix cleanup teardown in TransmitterInitialize

Using "while (--Index > 0)" will miss tearing down the last ring.

Index is a signed LONG so using a >= 0 comparison is safe in this
context.

Signed-off-by: Tu Dinh <ngoc-tu.dinh@xxxxxxxxxx>
---
 src/xenvif/transmitter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/xenvif/transmitter.c b/src/xenvif/transmitter.c
index 88dfb60..41d0f3c 100644
--- a/src/xenvif/transmitter.c
+++ b/src/xenvif/transmitter.c
@@ -4615,7 +4615,7 @@ TransmitterInitialize(
 fail7:
     Error("fail7\n");

-    while (--Index > 0) {
+    while (--Index >= 0) {
         PXENVIF_TRANSMITTER_RING    Ring = (*Transmitter)->Ring[Index];

         (*Transmitter)->Ring[Index] = NULL;
--
2.54.0.windows.1



--
Ngoc Tu Dinh | Vates XCP-ng Developer

XCP-ng & Xen Orchestra - Vates solutions

web: https://vates.tech



 


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