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Date: Wed, 20 Jul 2022 22:21:17 +0900
From: Stafford Horne <shorne@gmail.com>
Subject: Re: [PATCH v2 2/2] asm-generic: Add new pci.h and use it
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To: Christoph Hellwig <hch@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>, LKML <linux-kernel@vger.kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Richard Weinberger <richard@nod.at>, Anton Ivanov <anton.ivanov@cambridgegreys.com>, Johannes Berg <johannes@sipsolutions.net>, Bjorn Helgaas <bhelgaas@google.com>, Linux ARM <linux-arm-kernel@lists.infradead.org>, linux-csky@vger.kernel.org, linux-riscv <linux-riscv@lists.infradead.org>, linux-um <linux-um@lists.infradead.org>, linux-pci <linux-pci@vger.kernel.org>, linux-arch <linux-arch@vger.kernel.org>

On Tue, Jul 19, 2022 at 07:32:46AM -0700, Christoph Hellwig wrote:
> On Tue, Jul 19, 2022 at 10:05:46PM +0900, Stafford Horne wrote:
> > > > Or we could try to keep the generic definition in a global header
> > > > like linux/isa-dma.h.
> > > 
> > > Perhaps option 3 makes the whole patch the most clean.
> > 
> > And this is the result, I will get this into the series and create a v4 tomorrow
> > if no issues.
> 
> Yes, this is what I tried to suggest earlier and it looks fine to me.
> If we want to overengineer it we could add a ISA_DMA_BRIDGE_BUGGY
> Kconfig symbol and select it from x86.

I left it as X86_32, I feel it it would be more confusing/hard to maintain to
add the extra level of indirection.

-Stafford

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