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Date:   Fri, 16 Aug 2019 15:25:07 -0700
From:   Nicolin Chen <nicoleotsuka@gmail.com>
To:     Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Cc:     Christoph Hellwig <hch@lst.de>, kvalo@codeaurora.org,
        davem@davemloft.net, ath10k@lists.infradead.org,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, m.szyprowski@samsung.com,
        robin.murphy@arm.com, iommu@lists.linux-foundation.org,
        tobias.klausmann@freenet.de
Subject: Re: regression in ath10k dma allocation
Message-ID: <20190816222506.GA24413@Asurada-Nvidia.nvidia.com>
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Hi Tobias

On Fri, Aug 16, 2019 at 10:16:45PM +0200, Tobias Klausmann wrote:
> > do you have CONFIG_DMA_CMA set in your config?  If not please make sure
> > you have this commit in your testing tree, and if the problem still
> > persists it would be a little odd and we'd have to dig deeper:
> > 
> > commit dd3dcede9fa0a0b661ac1f24843f4a1b1317fdb6
> > Author: Nicolin Chen <nicoleotsuka@gmail.com>
> > Date:   Wed May 29 17:54:25 2019 -0700
> > 
> >      dma-contiguous: fix !CONFIG_DMA_CMA version of dma_{alloc, free}_contiguous()

> yes CONFIG_DMA_CMA is set (=y, see attached config), the commit you mention
> above is included, if you have any hints how to go forward, please let me
> know!

For CONFIG_DMA_CMA=y, by judging the log with error code -12, I
feel this one should work for you. Would you please check if it
is included or try it out otherwise?

dma-contiguous: do not overwrite align in dma_alloc_contiguous()
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=c6622a425acd1d2f3a443cd39b490a8777b622d7

Thanks
Nicolin