[2/2, v3] powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism

[Michael Ellerman]

On Mon, 2016-11-04 at 19:17:23 UTC, "Guilherme G. Piccoli" wrote:
> Commit 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn")
> changed the pci_dn struct by removing its EEH-related members.
> As part of this clean-up, DDW mechanism was modified to read the device
> configuration address from eeh_dev struct.
> 
> As a consequence, now if we disable EEH mechanism on kernel command-line
> for example, the DDW mechanism will fail, generating a kernel oops by
> dereferencing a NULL pointer (which turns to be the eeh_dev pointer).
> 
> This patch just changes the configuration address calculation on DDW
> functions to a manual calculation based on pci_dn members instead of
> using eeh_dev-based address.
> 
> No functional changes were made. This was tested on pSeries, both
> in PHyp and qemu guest.
> 
> Fixes: 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn")
> 
> Cc: stable at vger.kernel.org
> Reviewed-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8445a87f7092bc8336ea1305be

cheers