[PATCH] drm/ttm: dma: Don't crash on memory in the vmalloc range

[Thierry Reding]

On Fri, May 15, 2015 at 04:09:54PM +0900, Alexandre Courbot wrote:
> dma_alloc_coherent() can return memory in the vmalloc range.
> virt_to_page() cannot handle such addresses and crashes. This
> patch detects such cases and obtains the struct page * using
> vmalloc_to_page() instead.
> 
> Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
> ---
> This patch is a follow-up of the following discussion:
> 
> https://www.marc.info/?l=dri-devel&m=141579595431254&w=3
> 
> It works for me on both 32-bit and 64-bit Tegra, so I am not convinced
> that Thierry's initial change from virt_to_page() to phys_to_page() is
> still required - Thierry, can you confirm whether your patch is still
> relevant after this one?

If this works for you on both 32-bit and 64-bit Tegra I don't think the
earlier patch is still relevant and this looks indeed like a much more
appropriate solution.

Thierry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20150515/6858cad3/attachment.sig>