[kernel] powerpc/iommu: Set default DMA offset in dma_dev_setup

Alexey Kardashevskiy aik at ozlabs.ru
Thu Aug 27 23:07:52 AEST 2015

On 08/27/2015 07:37 PM, Michael Ellerman wrote:
> On Thu, 2015-27-08 at 06:01:16 UTC, Alexey Kardashevskiy wrote:
>> "powerpc/iommu: Cleanup setting of DMA base/offset" expects that
> This should be:
> Commit e91c25111aa3 "powerpc/iommu: Cleanup setting of DMA base/offset" ...

Is not this format for reverts (which this patch is not)?

>> the default DMA offset is set from pnv_ioda_setup_bus_dma() which
>> is correct unless it is SRIOV where the code flow is different - at
>> the moment when pnv_ioda_setup_bus_dma() is called, there is no PE for
>> the just created VF.
>> This adds missing set_dma_offset() to pnv_pci_ioda_dma_dev_setup()
>> to cover the case of SRIOV.
>> Note that we still need set_dma_offset() in pnv_ioda_setup_bus_dma()
>> as at the boot time pnv_pci_ioda_dma_dev_setup() is called when no PE
>> was created yet, this happens at the PHB fixup stage.
> And here we should have:
> Fixes: e91c25111aa3 ("powerpc/iommu: Cleanup setting of DMA base/offset")
>> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
>> Reviewed-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
>> ---
>> Makes sense to squash it to "powerpc/iommu: Cleanup setting of DMA base/offset".
> We don't squash things that are already in next.

imho this screams for rebase. There is no point in having broken patches in 
non merged tree, rebase is a very cheap operation.

> I've fixed the change log up with my comments above and your reworded
> explanation.


> cheers


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