[PATCH 20/44] sparc: implement ->mapping_error

[David Miller]

From: Christoph Hellwig <hch at lst.de>
Date: Thu,  8 Jun 2017 15:25:45 +0200

> DMA_ERROR_CODE is going to go away, so don't rely on it.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Acked-by: David S. Miller <davem at davemloft.net>