[Qemu-block] [PATCH 1/3] dataplane/xen-block: remove dead code

[Paul Durrant]

The if() statement is clearly bogus (dead code which should have been
cleaned up when grant mapping was removed).

Spotted by Coverity: CID 1398635

While in the neighbourhood, add a missing 'fall through' annotation.

Reported-by: Peter Maydell <address@hidden>
Signed-off-by: Paul Durrant <address@hidden>
---
Cc: Stefan Hajnoczi <address@hidden>
Cc: Stefano Stabellini <address@hidden>
Cc: Anthony Perard <address@hidden>
Cc: Kevin Wolf <address@hidden>
Cc: Max Reitz <address@hidden>
---
 hw/block/dataplane/xen-block.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/hw/block/dataplane/xen-block.c b/hw/block/dataplane/xen-block.c
index c6a15da024..f1523c5b45 100644
--- a/hw/block/dataplane/xen-block.c
+++ b/hw/block/dataplane/xen-block.c
@@ -281,10 +281,6 @@ static void xen_block_complete_aio(void *opaque, int ret)
         break;
     case BLKIF_OP_WRITE:
     case BLKIF_OP_FLUSH_DISKCACHE:
-        if (!request->req.nr_segments) {
-            break;
-        }
-        break;
     default:
         break;
     }
@@ -298,6 +294,7 @@ static void xen_block_complete_aio(void *opaque, int ret)
         if (!request->req.nr_segments) {
             break;
         }
+        /* fall through */
     case BLKIF_OP_READ:
         if (request->status == BLKIF_RSP_OKAY) {
             block_acct_done(blk_get_stats(dataplane->blk), &request->acct);
-- 
2.20.1.2.gb21ebb6