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Message-ID: <20191001063744.GA10402@infradead.org>
Date: Mon, 30 Sep 2019 23:37:44 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Nicolas Boichat <drinkcat@...omium.org>
Cc: Shik Chen <shik@...omium.org>,
Linux Media Mailing List <linux-media@...r.kernel.org>,
Tomasz Figa <tfiga@...omium.org>, notify@...nel.org,
Keiichi Watanabe <keiichiw@...omium.org>,
Ricky Liang <jcliang@...omium.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
lkml <linux-kernel@...r.kernel.org>,
kieran.bingham@...asonboard.com, Vlastimil Babka <vbabka@...e.cz>,
Christoph Lameter <cl@...ux.com>,
Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] media: uvcvideo: Use streaming DMA APIs to transfer
buffers
On Mon, Sep 30, 2019 at 01:23:10AM -0700, Christoph Hellwig wrote:
> And drivers really have no business looking at the dma mask. I have
> a plan for dma_alloc_pages API that could replace that cruft, but
> until then please use GFP_KERNEL and let the dma subsystem bounce
> buffer if needed.
Can you try this series:
http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma_alloc_pages
and see if it does whay you need for usb?
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