linux-kernel - Re: [PATCH 00/20] DMA: DMA unmap fixes

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Date:	Fri, 30 Nov 2012 11:57:38 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Dan Williams <djbw@...com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Håvard Skinnemoen <hskinnemoen@...il.com>,
	Ira Snyder <iws@...o.caltech.edu>,
	"Koul, Vinod" <vinod.koul@...el.com>, vipin.kumar@...com,
	t.figa@...sung.com,
	"kyungmin.park@...sung.com" <kyungmin.park@...sung.com>,
	Dave Jiang <dave.jiang@...il.com>
Subject: Re: [PATCH 00/20] DMA: DMA unmap fixes

On Wednesday 07 November 2012 21:40:57 Dan Williams wrote:
> On Mon, Nov 5, 2012 at 2:00 AM, Bartlomiej Zolnierkiewicz
> <b.zolnierkie@...sung.com> wrote:
> > Hi,
> >
> > Currently DMA subsystem does DMA mapping in the core code and DMA
> > unmapping is done by device drivers.  This is counterintuitive,
> > causes code duplication and subtle errors (some drivers like PL330
> > one don't implement DMA unmapping code).  The following patchset
> > modifies DMA subsystem to do DMA unmapping in the core code.
> > It results in simpler code, less code duplication (more than 400
> > LOC is gone) and fixes the issue with missing DMA unmapping code
> > in some drivers.  Additionally many cases when DMA wasn't unmapped
> > on a failure are also fixed.
> >
> >
> > patches #1-3 add missing DMA unmap on failure to async_tx core
> > code (async_memcpy()), ioat and fsmc_nand drivers
> >
> > patch #4 fixes DMA flags used by carma-fpga driver
> 
> Ack patches 1-4

[...]

> > patch #8 adds missing DMA unmap on failure to ioat3 driver
> >
> > patch #9 fixes build for async_memset.c
> >
> > patch #10 adds missing DMA unmap on failure to async tx core
> > code (async_memset())
> 
> Ack patches 8-10

Thank you.

Could these patches be merged for 3.8 by either your's or Vinod's tree?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung Poland R&D Center
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