Re: [PATCH] IB/core: Restore I/O MMU, s390 and powerpc support

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

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On Tue, Mar 07, 2017 at 10:56:53PM +0000, Bart Van Assche wrote:
> Avoid that the following error message is reported on the console
> while loading an RDMA driver with I/O MMU support enabled:
>
> DMAR: Allocating domain for mlx5_0 failed
>
> Ensure that DMA mapping operations that use to_pci_dev() to
> access to struct pci_dev see the correct PCI device. E.g. the s390
> and powerpc DMA mapping operations use to_pci_dev() even with I/O
> MMU support disabled.
>
> This patch preserves the following changes of the DMA mapping updates
> patch series:
> - Introduction of dma_virt_ops.
> - Removal of ib_device.dma_ops.
> - Removal of struct ib_dma_mapping_ops.
> - Removal of an if-statement from each ib_dma_*() operation.
> - IB HW drivers no longer set dma_device directly.
>
> Reported-by: Sebastian Ott <sebott-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> Reported-by: Parav Pandit <parav-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Fixes: commit 99db9494035f ("IB/core: Remove ib_device.dma_device")
> Signed-off-by: Bart Van Assche <bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
> ---
>  drivers/infiniband/core/device.c | 26 ++++++++++++++++++++------
>  include/rdma/ib_verbs.h          | 30 +++++++++++++++++-------------
>  2 files changed, 37 insertions(+), 19 deletions(-)
>

Hi Doug,

Can you please forward this patch to Linus? The IB/core is broken
without this patch.

Thanks

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