Re: [Qemu-devel] [PATCH] block: fix QEMU crash with scsi-hd and drive_del

[Paolo Bonzini]

On 23/05/2018 16:46, Greg Kurz wrote:
> Maybe change bdrv_root_unref_child() to ensure we don't call
> bdrv_close() with pending I/O requests ?
> 
>  void bdrv_root_unref_child(BdrvChild *child)
>  {
>      BlockDriverState *child_bs;
>  
>      child_bs = child->bs;
> +    bdrv_drained_begin(child_bs);
>      bdrv_detach_child(child);
> +    bdrv_drained_end(child_bs);
>      bdrv_unref(child_bs);
>  }

Maybe bdrv_detach_child should do it.

Paolo