Commit ffa56e55 authored Sep 15, 2010 by Nishanth Aravamudan Committed by Benjamin Herrenschmidt Oct 13, 2010

powerpc/dma: Fix check for direct DMA support



The current check is wrong because it does not take the DMA offset intot
account, and in the case of a driver which doesn't actually support
64bits would falsely report that device as working.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 1cb8e85a

arch/powerpc/kernel/dma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -90,7 +90,7 @@ static int dma_direct_dma_supported(struct device *dev, u64 mask)
		/* Could be improved so platforms can set the limit in case
		* they have limited DMA windows
		*/
		return mask >= (memblock_end_of_DRAM() - 1);
		return mask >= get_dma_offset(dev) + (memblock_end_of_DRAM() - 1);
		#else
		return 1;
		#endif