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From d7a6dbe86fbbb30cc8142deb71763089aa1f2b62 Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 18 Oct 2013 08:14:49 +0200
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Subject: [PATCH 24/81] block/get_block_status: set *pnum = 0 on error
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <1382084091-16636-25-git-send-email-pbonzini@redhat.com>
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Patchwork-id: 55007
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O-Subject: [RHEL 7.0 qemu-kvm PATCH 24/26] block/get_block_status: set *pnum = 0 on error
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Bugzilla: 989646
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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From: Peter Lieven <pl@kamp.de>
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if the call is invoked through bdrv_is_allocated the caller might
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expect *pnum = 0 on error. however, a new implementation of
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bdrv_get_block_status might only return a negative exit value on
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error while keeping *pnum untouched.
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: Peter Lieven <pl@kamp.de>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 3e0a233d869e74e78b516be34715b91528508cfc)
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---
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block.c | 1 +
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1 file changed, 1 insertion(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block.c | 1 +
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1 files changed, 1 insertions(+), 0 deletions(-)
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diff --git a/block.c b/block.c
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index f993b2e..02e111e 100644
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--- a/block.c
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+++ b/block.c
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@@ -3069,6 +3069,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
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ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
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if (ret < 0) {
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+ *pnum = 0;
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return ret;
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}
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--
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1.7.1
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