[kernel] powerpc/powernv/ioda2: Remove redundand free of TCE pages

[Michael Ellerman]

On Wed, 2018-05-30 at 09:22:50 UTC, Alexey Kardashevskiy wrote:
> When IODA2 creates a PE, it creates an IOMMU table with it_ops::free
> set to pnv_ioda2_table_free() which calls pnv_pci_ioda2_table_free_pages().
> 
> Since iommu_tce_table_put() calls it_ops::free when the last reference
> to the table is released, explicit call to pnv_pci_ioda2_table_free_pages()
> is not needed so let's remove it.
> 
> This should fix double free in the case of PCI hotuplug as
> pnv_pci_ioda2_table_free_pages() does not reset neither
> iommu_table::it_base nor ::it_size.
> 
> This was not exposed by SRIOV as it uses different code path via
> pnv_pcibios_sriov_disable().
> 
> IODA1 does not inialize it_ops::free so it does not have this issue.
> 
> Fixes: c5f7700bb "powerpc/powernv: Dynamically release PE"
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/98fd72fe82527fd26618062b60cfd3

cheers