Re: Regression: dmaengine: imx28 with emmc

[Bruno Thomsen <bruno.thomsen@xxxxxxxxx>]

Hi Sascha,

Den man. 14. okt. 2019 kl. 16.13 skrev Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>:
>
> > I am getting a kernel oops[1] during boot on imx28 with emmc flash right
> > around rootfs mounting. Using git bisect I found the cause to be the
> > following commit.
> >
> > Regression: ceeeb99cd821 ("dmaengine: mxs: rename custom flag")
>
> Damn, I wasn't aware the DMA driver has other users than the GPMI Nand.
> Please try the attached patch, it should fix it for MMC/SD. It seems
> however, that I2C and AUART and SPI are also affected. Are you able to
> test any of these?

Thanks for looking into the reported issue.

I have tested your patch and it works. Rootfs is now successfully
mounted during boot and it seems to work in user-land as well.

Yes, our hardware uses I2C, AUARTs and SPI as well so I can test more patches.
I have not seen them produce kernel oops or errors, so maybe they
fallback to non-DMA mode.

> Subject: [PATCH] mmc: mxs: fix flags passed to dmaengine_prep_slave_sg
>
> Fixes: ceeeb99cd821 ("dmaengine: mxs: rename custom flag")
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>

Reported-by: Bruno Thomsen <bruno.thomsen@xxxxxxxxx>
Tested-by: Bruno Thomsen <bruno.thomsen@xxxxxxxxx>

/Bruno

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