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block: copy enable_write_cache in bdrv_append
Because the guest will be able to flip enable_write_cache, the actual state may not match what is used to open the new snapshot. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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block.c
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block.c
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@ -1000,6 +1000,8 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top)
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tmp.buffer_alignment = bs_top->buffer_alignment;
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tmp.copy_on_read = bs_top->copy_on_read;
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tmp.enable_write_cache = bs_top->enable_write_cache;
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/* i/o timing parameters */
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tmp.slice_time = bs_top->slice_time;
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tmp.slice_start = bs_top->slice_start;
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