On Mon, Mar 16, 2020 at 08:32:16PM +0100, Christoph Hellwig wrote:
> Hmm range fault will succeed for any kind of device private memory,
> even if it doesn't belong to the calling entity. While nouveau
> has some crude checks for that, they are broken because they assume
> nouveau is the only user of device private memory. Fix this by
> passing in an expected pgmap owner in the hmm_range_fault structure.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Fixes: 4ef589dc9b10 ("mm/hmm/devmem: device memory hotplug using ZONE_DEVICE")
> ---
> drivers/gpu/drm/nouveau/nouveau_dmem.c | 12 ------------
> include/linux/hmm.h | 2 ++
> mm/hmm.c | 10 +++++++++-
> 3 files changed, 11 insertions(+), 13 deletions(-)
Nice
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Jason
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