Commit abd9a0c3 authored May 17, 2013 by Sebastian Ott Committed by Martin Schwidefsky May 22, 2013

s390/dma: do not call debug_dma after free



In dma_free_coherent call debug_dma_free_coherent before deallocating
the memory to avoid a possible use after free.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 519fe2ec

arch/s390/include/asm/dma-mapping.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -71,8 +71,8 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
		{
		struct dma_map_ops *dma_ops = get_dma_ops(dev);

		dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
		debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
		dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
		}

		#endif /* _ASM_S390_DMA_MAPPING_H */