[win-pv-devel] [PATCH] Succeed SRBs that the backend doesnt support

[<owen.smith@xxxxxxxxxx>]

From: Owen Smith <owen.smith@xxxxxxxxxx>

If the backend does not support BLKIF_OP_DISCARD, BLKIF_OP_WRITE_BARRIER,
or BLKIF_OP_FLUSH_DISKCACHE, the first request will be failed and
subsiquent requests will be succeeded instead of being passed to the
backend. Bring the SRB status into line in both of these situations.

Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>
---
 src/xenvbd/pdo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/xenvbd/pdo.c b/src/xenvbd/pdo.c
index 3efe711..a3be031 100644
--- a/src/xenvbd/pdo.c
+++ b/src/xenvbd/pdo.c
@@ -1539,7 +1539,8 @@ PdoCompleteResponse(
     case BLKIF_RSP_EOPNOTSUPP:
         // Remove appropriate feature support
         FrontendRemoveFeature(Pdo->Frontend, Request->Operation);
-        Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
+        // Succeed this SRB, subsiquent SRBs will be succeeded instead of 
being passed to the backend.
+        Srb->SrbStatus = SRB_STATUS_SUCCESS;
         Warning("Target[%d] : %s BLKIF_RSP_EOPNOTSUPP (Tag %x)\n",
                 PdoGetTargetId(Pdo), BlkifOperationName(Request->Operation), 
Tag);
         break;
-- 
2.8.3


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