From 73e5a848426fae8e7f1f685389aa61d7a98e7c36 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 18 Jun 2013 17:32:26 +0200 Subject: [PATCH] s390/dma: fix mapping_error detection The map_page implementation of s390 returns DMA_ERROR_CODE in an error situation. Correctly test if a mapping was erroneous (DMA_ERROR_CODE is defined as ~0). Signed-off-by: Sebastian Ott Acked-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/dma-mapping.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/include/asm/dma-mapping.h b/arch/s390/include/asm/dma-mapping.h index 886ac7d4937a..9f15a36f6fd9 100644 --- a/arch/s390/include/asm/dma-mapping.h +++ b/arch/s390/include/asm/dma-mapping.h @@ -52,7 +52,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) if (dma_ops->mapping_error) return dma_ops->mapping_error(dev, dma_addr); - return (dma_addr == 0UL); + return (dma_addr == DMA_ERROR_CODE); } static inline void *dma_alloc_coherent(struct device *dev, size_t size, -- 2.30.2