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Date:   Thu, 12 Oct 2023 16:00:38 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Greg Ungerer <gerg@linux-m68k.org>
Cc:     Michael Schmitz <schmitzmic@gmail.com>,
        Christoph Hellwig <hch@lst.de>,
        Robin Murphy <robin.murphy@arm.com>, iommu@lists.linux.dev,
        Marek Szyprowski <m.szyprowski@samsung.com>,
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        linux-m68k@lists.linux-m68k.org, netdev@vger.kernel.org,
        Jim Quinlan <james.quinlan@broadcom.com>
Subject: Re: [PATCH 5/6] net: fec: use dma_alloc_noncoherent for m532x
Message-ID: <20231012140038.GA8513@lst.de>
References: <20231009074121.219686-1-hch@lst.de> <20231009074121.219686-6-hch@lst.de> <ea608718-8a50-4f87-aecf-fc100d283fe8@arm.com> <0299895c-24a5-4bd4-b7a4-dc50cc21e3d8@linux-m68k.org> <20231011055213.GA1131@lst.de> <cff2d9f0-4719-4b88-8ed5-68c8093bcebf@linux-m68k.org> <12c7b0db-938c-9ca4-7861-dd703a83389a@gmail.com> <e16ac0a4-3e4a-4e8c-98ba-7b600a8c6768@linux-m68k.org>
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On Thu, Oct 12, 2023 at 11:25:00PM +1000, Greg Ungerer wrote:
> Not sure I follow. This is the opposite of the case above. The noncoherent alloc
> and cache flush should be performed if ColdFire and any of CONFIG_HAVE_CACHE_CB,
> CONFIG_CACHE_D or CONFIG_CACHE_BOTH are set - since that means there is data
> caching involved.

FYI, this is what I ended up with this morning:

http://git.infradead.org/users/hch/misc.git/commitdiff/ea7c8c5ca3f158f88594f4f1c9a52735115f9aca

Whole branch:

http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-coherent-deps