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s390/dma: fix mapping_error detection

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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 <sebott@linux.vnet.ibm.com>
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-06-18 17:32:26 +02:00 committed by Martin Schwidefsky
parent 690cec8e70
commit 73e5a84842
1 changed files with 1 additions and 1 deletions
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2
arch/s390/include/asm/dma-mapping.h
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@ -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,