Am 09.02.2018 um 14:32 schrieb Tom St Denis:
On 02/02/18 02:09 PM, Christian König wrote:
[SNIP]
+ if (p->mapping != adev->mman.bdev.dev_mapping)
+ return -EPERM;
This comparison fails for both IOMMU and non-IOMMU devices in my
carrizo+polaris10 box.
The address being read from is what the VM decodes to (checked with
strace).
Have you applied the whole series? That patches before this one are
necessary to initialize p->mapping when there isn't any userspace
mapping for the page.
Christian.
Tom
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