linux-kernel - Re: [PATCH] xtensa: implement arch_dma_coherent_to

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Message-ID: <20191016070827.GA23051@lst.de>
Date:   Wed, 16 Oct 2019 09:08:27 +0200
From:   Christoph Hellwig <hch@....de>
To:     Max Filippov <jcmvbkbc@...il.com>
Cc:     linux-xtensa@...ux-xtensa.org, Chris Zankel <chris@...kel.net>,
        Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xtensa: implement arch_dma_coherent_to_pfn

On Tue, Oct 15, 2019 at 02:25:26PM -0700, Max Filippov wrote:
> Add trivial implementation for arch_dma_coherent_to_pfn.
> This change enables communication with PCI ALSA devices through mmapped
> buffers.

This looks fine, although I'd much rather convert xtensa to the
generic DMA remap / uncached segment support.

Do you want this fix for 5.4?  If so please queue it up ASAP so that
I can do the proper thing for 5.5.  If you don't need it that urgent
I'd rather go straight to the generic code.