From ebb0a0980d8347add30842be49555e4f07a4a047 Mon Sep 17 00:00:00 2001
From: Jeffrey Cody <jcody@redhat.com>
Date: Tue, 11 Feb 2014 16:14:29 +0100
Subject: [PATCH 23/28] block: remove QED .bdrv_make_empty implementation

RH-Author: Jeffrey Cody <jcody@redhat.com>
Message-id: <2f8e3c76feeda371ed325fb08b26f3bf7e776db3.1392134912.git.jcody@redhat.com>
Patchwork-id: 57219
O-Subject: [RHEL7 qemu-kvm PATCH 5/6] block: remove QED .bdrv_make_empty implementation
Bugzilla: 1047254
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Markus Armbruster <armbru@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

The QED .bdrv_make_empty() implementation does nothing but return
-ENOTSUP, which causes problems in bdrv_commit().  Since the function
stub exists for QED, it is called, which then always returns an error.

The proper way to not support an optional driver function stub is to
just not implement it, so let's remove the stub.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 55aff7f133b0eb20b2c8a2a3e1307240aab8044c)
---
 block/qed.c | 6 ------
 1 file changed, 6 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/qed.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/block/qed.c b/block/qed.c
index da68152..be5945b 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -731,11 +731,6 @@ static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
     return cb.status;
 }
 
-static int bdrv_qed_make_empty(BlockDriverState *bs)
-{
-    return -ENOTSUP;
-}
-
 static BDRVQEDState *acb_to_s(QEDAIOCB *acb)
 {
     return acb->common.bs->opaque;
@@ -1617,7 +1612,6 @@ static BlockDriver bdrv_qed = {
     .bdrv_create              = bdrv_qed_create,
     .bdrv_has_zero_init       = bdrv_has_zero_init_1,
     .bdrv_co_get_block_status = bdrv_qed_co_get_block_status,
-    .bdrv_make_empty          = bdrv_qed_make_empty,
     .bdrv_aio_readv           = bdrv_qed_aio_readv,
     .bdrv_aio_writev          = bdrv_qed_aio_writev,
     .bdrv_co_write_zeroes     = bdrv_qed_co_write_zeroes,
-- 
1.7.1