[Qemu-devel] [PATCH for-2.0] iscsi: ignore flushes on scsi-generic devices

[Paolo Bonzini]

Non-block SCSI devices do not support flushing, but we may still send
them requests via bdrv_flush_all.  Just ignore them.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 block/iscsi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/block/iscsi.c b/block/iscsi.c
index 0d15b4d..00316af 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -417,6 +417,10 @@ static int coroutine_fn iscsi_co_flush(BlockDriverState 
*bs)
     IscsiLun *iscsilun = bs->opaque;
     struct IscsiTask iTask;
 
+    if (bs->sg) {
+        return 0;
+    }
+
     iscsi_co_init_iscsitask(iscsilun, &iTask);
 
 retry:
-- 
1.9.0