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[Xen-devel] Re: [PATCH 4/4] xen/blkfront: cope with backend that fail empty BLKIF_OP_WRITE_BARRIER requests



>                                      info->gd->disk_name);
>                               error = -EOPNOTSUPP;
> +                     }
> +                     if (unlikely(bret->status == BLKIF_RSP_ERROR &&
> +                                  info->shadow[id].req.nr_segments == 0)) {
> +                             printk(KERN_WARNING "blkfront: %s: empty write 
> barrier op failed\n",
> +                                    info->gd->disk_name);
> +                             error = -EOPNOTSUPP;
> +                     }

We don't use -EOPNOTSUPP anymore in the new world order, anything
barrier related is just a normal I/O error now.


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