linux-kernel - Re: use generic DMA mapping code in powerpc V4

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Date:   Mon, 11 Feb 2019 08:38:04 +0100
From:   Christoph Hellwig <hch@....de>
To:     Christian Zigotzky <chzigotzky@...osoft.de>
Cc:     Christoph Hellwig <hch@....de>, linux-arch@...r.kernel.org,
        Darren Stevens <darren@...vens-zone.net>,
        linux-kernel@...r.kernel.org, Julian Margetson <runaway@...dw.ms>,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Paul Mackerras <paulus@...ba.org>,
        Olof Johansson <olof@...om.net>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: use generic DMA mapping code in powerpc V4

On Sun, Feb 10, 2019 at 01:00:20PM +0100, Christian Zigotzky wrote:
> I tested the whole series today. The kernels boot and the P.A. Semi 
> Ethernet works! :-) Thanks a lot!
>
> I also tested it in a virtual e5500 QEMU machine today. Unfortunately the 
> kernel crashes.

This looks like a patch I fixed in mainline a while ago, but which
the powerpc tree didn't have yet.

I've cherry picked this commit
("swiotlb: clear io_tlb_start and io_tlb_end in swiotlb_exit")

and added it to the powerpc-dma.6 tree, please retry with that one.