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powerpc: Revert c6102609 and replace it with the correct fix for vio dma mask setting 

This patch reverts my previous "fix", and replace it with the correct
fix from Russell.

And as Russell pointed out -- dma_set_mask_and_coherent() (and the other
dma_set_mask() functions) are really supposed to be used by drivers
only.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Li Zhong 2013-11-28 17:22:25 +08:00 committed by Benjamin Herrenschmidt
parent 847443774b
commit 10862a0c71
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/kernel/vio.c
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@ -1432,7 +1432,8 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
/* needed to ensure proper operation of coherent allocations
* later, in case driver doesn't set it explicitly */
dma_coerce_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64));
viodev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
viodev->dev.dma_mask = &viodev->dev.coherent_dma_mask;
}
/* register with generic device framework */