On 9/28/2016 4:25 PM, Parav Pandit wrote:
> This patch fixes below kernel crash on memory registration for rxe
> and other transport drivers which has dma_ops extension.
>
> IB/core invokes ib_map_sg_attrs() in generic manner with dma attributes
> which is used by mlx5 and mthca adapters.
> However in doing so it ignored honoring dma_ops extension of software based
> transports for sg map/unmap operation.
> This results into calling dma_map_sg_attrs of hardware virtual device
> resulting in crash for null reference.
>
> Fix: It extends core to support sg_map/unmap_attrs and transport drivers
> to implement those dma_ops callback functions.
> Verified usign perftest applications.
The commit message had to be largely rewritten, but the code was applied.
--
Doug Ledford <dledford@xxxxxxxxxx>
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