From: Christoph Hellwig <hch@lst.de>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Paul Burton <paul.burton@mips.com>,
Christoph Hellwig <hch@lst.de>,
linux-mips@linux-mips.org
Subject: Re: dma_pool broken on MIPS generic?
Date: Fri, 9 Nov 2018 14:24:40 +0100 [thread overview]
Message-ID: <20181109132440.GA12787@lst.de> (raw)
In-Reply-To: <20181109131014.GA29768@piout.net>
On Fri, Nov 09, 2018 at 02:10:14PM +0100, Alexandre Belloni wrote:
> Hello,
>
> I'm working on a (not yet upstreamed) dmaengine driver. While rebasing
> from v4.19 to v4.20-rc1, I saw that it is not working properly anymore
> because dma_pool is allocating descriptors in kseg0 which is cached
> while in v4.19, it was allocating them in kseg1.
>
> Am I missing something to explicitely state that the cache is not dma
> coherent? How could I track this behaviour change?
You probably want this commit:
https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?h=mips-fixes&id=d01501f85249848a2497968d46dd46d5c6fe32e6
next prev parent reply other threads:[~2018-11-09 13:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-09 13:10 dma_pool broken on MIPS generic? Alexandre Belloni
2018-11-09 13:24 ` Christoph Hellwig [this message]
2018-11-09 13:45 ` Alexandre Belloni
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