Re: Issue with pxa_dma driver on linux 4.4.y

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Sep 25, 2017 at 11:33:42PM +0200, Robert Jarzmik wrote:
> Dear maintainers,
> 
> In the tagging of fixing commits, I have submitted this patch which was merged
> into the stable tree :
>  - 6bab1c6afdca ("dmaengine: pxa_dma: fix the maximum requestor line")
> which translated into this commit in the stable tree :
>  - 94d75e190f19 ("dmaengine: pxa_dma: fix the maximum requestor line")
> 
> Unfortunately I have not tagged the dependant patches this one relies on, and
> more specifically :
>  - build breakage fix :
>    - c283e41ef324 ("dmaengine: mmp-pdma: add number of requestors")
>  - functionality breakage fix :
>    - 72b195cb7162 ("ARM: pxa: add the number of DMA requestor lines")
>    - 4c35430ad18f ("ARM: pxa: fix the number of DMA requestor lines")
> 
> I see 2 ways out of this situation :
>  - either we revert stable commit 94d75e190f19
>    => functionnality will remain broken, but only for a subset of DMA lines
>  - or apply the dependant patches, ie. c283e41ef324, 72b195cb7162, 4c35430ad18f
> 
> It's up to you, but if you could choose one and apply it, the build breakage
> will be gone.

I've applied the extra patches, thanks for letting me know.

> I must mention that there is no defconfig file so far with covers this specific
> build, and this was seen by Andrea who reported the issue.

Ah, that's why none of the build systems caught this.  Perhaps we should
add a defconfig for this?  Is there one in Linus's tree yet?

thanks,

greg k-h