From: eugeniy.paltsev@synopsys.com (Eugeniy Paltsev)
To: linux-snps-arc@lists.infradead.org
Subject: ensure dma_alloc_coherent always returns zeroed memory
Date: Thu, 20 Dec 2018 14:39:20 +0000 [thread overview]
Message-ID: <1545316759.14089.22.camel@synopsys.com> (raw)
In-Reply-To: <20181220143415.GA17726@lst.de>
On Thu, 2018-12-20@15:34 +0100, hch@lst.de wrote:
> On Thu, Dec 20, 2018@02:32:52PM +0000, Eugeniy Paltsev wrote:
> > Hi Christoph,
> >
> > I test kernel from your 'dma-alloc-always-zero' branch, and as
> > I can see we have DMA peripherals (like USB) broken.
>
> I would be really surprised if that is caused by the patch to add
> the zeroing.
Me too :)
> Can you check which commit caused the issue by bisecting
> from a known good baseline?
Yep. At least kernel build from v4.20-rc4 (which is base for your branch)
seems to work fine.
--
Eugeniy Paltsev
next prev parent reply other threads:[~2018-12-20 14:39 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-14 8:25 ensure dma_alloc_coherent always returns zeroed memory Christoph Hellwig
2018-12-14 8:25 ` [PATCH 1/2] dma-mapping: zero memory returned from dma_alloc_* Christoph Hellwig
2018-12-14 9:54 ` Geert Uytterhoeven
2018-12-14 9:55 ` Geert Uytterhoeven
2018-12-14 11:47 ` Christoph Hellwig
2018-12-14 12:36 ` Geert Uytterhoeven
2018-12-14 14:14 ` Greg Ungerer
2018-12-17 11:59 ` Christoph Hellwig
2018-12-14 12:12 ` Eugeniy Paltsev
2018-12-14 12:21 ` hch
2018-12-14 18:10 ` Sam Ravnborg
2018-12-14 18:35 ` Christoph Hellwig
2018-12-14 8:25 ` [PATCH 2/2] dma-mapping: deprecate dma_zalloc_coherent Christoph Hellwig
2018-12-14 13:33 ` ensure dma_alloc_coherent always returns zeroed memory Christoph Hellwig
2018-12-19 16:59 ` Christoph Hellwig
2018-12-20 14:32 ` Eugeniy Paltsev
2018-12-20 14:34 ` hch
2018-12-20 14:39 ` Eugeniy Paltsev [this message]
2018-12-20 14:46 ` hch
2018-12-20 17:37 ` hch
[not found] <1546019189.2822.23.camel@synopsys.com>
[not found] ` <20181228175806.GA16929@lst.de>
2019-01-24 21:25 ` Vineet Gupta
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