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xen-netback: don't "handle" error by BUG()
In particular -ENOMEM may come back here, from set_foreign_p2m_mapping(). Don't make problems worse, the more that handling elsewhere (together with map's status fields now indicating whether a mapping wasn't even attempted, and hence has to be considered failed) doesn't require this odd way of dealing with errors. This is part of XSA-362. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: stable@vger.kernel.org Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
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@ -1342,13 +1342,11 @@ int xenvif_tx_action(struct xenvif_queue *queue, int budget)
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return 0;
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gnttab_batch_copy(queue->tx_copy_ops, nr_cops);
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if (nr_mops != 0) {
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if (nr_mops != 0)
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ret = gnttab_map_refs(queue->tx_map_ops,
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NULL,
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queue->pages_to_map,
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nr_mops);
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BUG_ON(ret);
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}
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work_done = xenvif_tx_submit(queue);
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