Adding Greg, since this will apply to a similar patchset I sent out
for VMCI.

----- Original Message -----

From: Andy King <redacted>
Date: Tue, 20 Aug 2013 10:33:32 -0700

quoted

We can't just do virt_to_phys() on memory that we pass to the device and
expect it to work in presence of a virtual IOMMU.  We need to add IOMMU
mappings for such DMAs to work correctly.  Fix that with
pci_alloc_consistent() where possible, or pci_map_single() where the
mapping is short-lived or we don't control the allocation (netdev).

Please use dma_alloc_coherent() (or in fact dma_zalloc_coherent()),
dma_map_single() et al., because they are preferred and in particular
allow specification of GFP_* flags

Sorry about that, I'll fix that and send out a new patch.

Thanks!
- Andy