Re: [RFC PATCH powerpc] Fix a dma_mask issue of vio

On Wed, 2013-11-20 at 23:23 +0000, Russell King - ARM Linux wrote:

Li Zong's patch works around the issue of a failing dma_set_mask(),
but as I've already said elsewhere, the real fix is to get whatever
created the struct device to initialise the dev->dma_mask with a
bus default.

Using dma_coerce_xxx() merely makes the problem "go away" papering
over the issue - it's fine to do it this way, but someone should still
fix the broken code creating these devices...

Ok, they are created by the vio bus core, so it should be doing the
job here of setting the dma_mask pointer to a proper value.

Li, can you take care of that ? Look at other bus types we have in
there such as the macio bus etc...

Cheers,
Ben.