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migration/block-dirty-bitmap: fix dirty_bitmap_mig_before_vm_start

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Using the _locked version of bdrv_enable_dirty_bitmap to bypass locking
is wrong as we do not already own the mutex.  Moreover, the adjacent
call to bdrv_dirty_bitmap_enable_successor grabs the mutex.

Fixes: 58f72b965e9e1q
Cc: qemu-stable@nongnu.org # v3.0
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200727194236.19551-8-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit e6ce5e9224)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy
2020-07-27 22:42:22 +03:00
committed by Michael Roth
parent b52a91816e
commit 08550a9940
1 changed files with 1 additions and 1 deletions
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2
migration/block-dirty-bitmap.c
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@ -498,7 +498,7 @@ void dirty_bitmap_mig_before_vm_start(void)
DirtyBitmapLoadBitmapState *b = item->data; DirtyBitmapLoadBitmapState *b = item->data;
if (b->migrated) { if (b->migrated) {
bdrv_enable_dirty_bitmap_locked(b->bitmap); bdrv_enable_dirty_bitmap(b->bitmap);
} else { } else {
bdrv_dirty_bitmap_enable_successor(b->bitmap); bdrv_dirty_bitmap_enable_successor(b->bitmap);
} }