Re: ensure dma_alloc_coherent always returns zeroed memory

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To: Eugeniy Paltsev <eugeniy.paltsev@xxxxxxxxxxxx>
Subject: Re: ensure dma_alloc_coherent always returns zeroed memory
From: "hch@xxxxxx" <hch@xxxxxx>
Date: Thu, 20 Dec 2018 18:37:17 +0100
Cc: "linux-s390@xxxxxxxxxxxxxxx" <linux-s390@xxxxxxxxxxxxxxx>, "monstr@xxxxxxxxx" <monstr@xxxxxxxxx>, "linux-c6x-dev@xxxxxxxxxxxxx" <linux-c6x-dev@xxxxxxxxxxxxx>, "linux-parisc@xxxxxxxxxxxxxxx" <linux-parisc@xxxxxxxxxxxxxxx>, "linux-xtensa@xxxxxxxxxxxxxxxx" <linux-xtensa@xxxxxxxxxxxxxxxx>, "vineet.gupta1@xxxxxxxxxxxx" <vineet.gupta1@xxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx" <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, "ashutosh.dixit@xxxxxxxxx" <ashutosh.dixit@xxxxxxxxx>, "linux-m68k@xxxxxxxxxxxxxxxxxxxx" <linux-m68k@xxxxxxxxxxxxxxx>, "openrisc@xxxxxxxxxxxxxxxxxxxx" <openrisc@xxxxxxxxxxxxxxxxxxxx>, "linux-alpha@xxxxxxxxxxxxxxx" <linux-alpha@xxxxxxxxxxxxxxx>, "sparclinux@xxxxxxxxxxxxxxx" <sparclinux@xxxxxxxxxxxxxxx>, "linux-snps-arc@xxxxxxxxxxxxxxxxxxx" <linux-snps-arc@xxxxxxxxxxxxxxxxxxx>, "hch@xxxxxx" <hch@xxxxxx>
In-reply-to: <20181220144604.GA18034@lst.de>
References: <20181214082515.14835-1-hch@lst.de> <20181219165939.GA26087@lst.de> <1545316369.14089.20.camel@synopsys.com> <20181220143415.GA17726@lst.de> <1545316759.14089.22.camel@synopsys.com> <20181220144604.GA18034@lst.de>
User-agent: Mutt/1.5.17 (2007-11-01)

Btw, can you try wit the very latests dma-mapping-for-next tree
which has a new fix from Thierry Reding that might be related.

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References:
- ensure dma_alloc_coherent always returns zeroed memory
  - From: Christoph Hellwig
- Re: ensure dma_alloc_coherent always returns zeroed memory
  - From: Christoph Hellwig
- Re: ensure dma_alloc_coherent always returns zeroed memory
  - From: Eugeniy Paltsev
- Re: ensure dma_alloc_coherent always returns zeroed memory
  - From: hch@xxxxxx
- Re: ensure dma_alloc_coherent always returns zeroed memory
  - From: Eugeniy Paltsev
- Re: ensure dma_alloc_coherent always returns zeroed memory
  - From: hch@xxxxxx

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