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From cd67eba4f11bb3d188df01dd9c30b96c7665f8f3 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Mon, 17 Mar 2014 22:45:30 +0100
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Subject: [PATCH 5/6] block: bs->drv may be NULL in bdrv_debug_resume()
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <1395096331-12610-3-git-send-email-mreitz@redhat.com>
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Patchwork-id: 58120
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O-Subject: [RHEL-7.0 qemu-kvm PATCH 2/3] block: bs->drv may be NULL in bdrv_debug_resume()
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Bugzilla: 1048575
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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BZ: 1048575
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Currently, bdrv_debug_resume() requires every bs->drv in the BDS stack
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to be NULL until a bs->drv with an implementation of bdrv_debug_resume()
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is found. For a normal function, this would be fine, but this is a
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function for debugging purposes and should therefore allow intermediate
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BDS not to have a driver (i.e., be "ejected"). Otherwise, it is hard to
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debug such situations.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 938789ea92b3073ad1113b3e1bdf90d469ea4bf4)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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---
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block.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/block.c b/block.c
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index ae55535..0321c74 100644
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--- a/block.c
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+++ b/block.c
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@@ -3831,7 +3831,7 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
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int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
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{
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- while (bs && bs->drv && !bs->drv->bdrv_debug_resume) {
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+ while (bs && (!bs->drv || !bs->drv->bdrv_debug_resume)) {
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bs = bs->file;
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}
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--
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1.7.1
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