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powerpc/dma: Fix check for direct DMA support
authorNishanth Aravamudan <nacc@us.ibm.com>
Wed, 15 Sep 2010 08:05:46 +0000 (08:05 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 13 Oct 2010 05:19:21 +0000 (16:19 +1100)
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>

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