From: Christoph Hellwig <hch@infradead.org>
To: Nicolas Boichat <drinkcat@chromium.org>
Cc: Shik Chen <shik@chromium.org>,
Linux Media Mailing List <linux-media@vger.kernel.org>,
Tomasz Figa <tfiga@chromium.org>,
notify@kernel.org, Keiichi Watanabe <keiichiw@chromium.org>,
Ricky Liang <jcliang@chromium.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
lkml <linux-kernel@vger.kernel.org>,
kieran.bingham@ideasonboard.com, Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@linux.com>,
Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] media: uvcvideo: Use streaming DMA APIs to transfer buffers
Date: Mon, 30 Sep 2019 23:37:44 -0700 [thread overview]
Message-ID: <20191001063744.GA10402@infradead.org> (raw)
In-Reply-To: <20190930082310.GA1750@infradead.org>
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?
next prev parent reply other threads:[~2019-10-01 6:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 13:12 [PATCH] media: uvcvideo: Use streaming DMA APIs to transfer buffers Shik Chen
2019-08-27 2:03 ` Tomasz Figa
2019-09-28 3:33 ` Nicolas Boichat
2019-09-30 8:23 ` Christoph Hellwig
2019-10-01 6:37 ` Christoph Hellwig [this message]
2020-02-27 6:28 ` Tomasz Figa
2020-04-21 11:21 ` Tomasz Figa
2020-04-27 12:48 ` Christoph Hellwig
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