RE: [RFC v1 PATCH 1/3] drivers: soc: add support for soc_device_match returning -EPROBE_DEFER

Alice Guo (OSS)
2021-04-19T06:40:55Z

> -----Original Message-----
> From: Dominique MARTINET <dominique.martinet@atmark-techno.com>
> Sent: 2021年4月19日 12:49
> To: Alice Guo (OSS) <alice.guo@oss.nxp.com>
> Cc: gregkh@linuxfoundation.org; rafael@kernel.org; Horia Geanta
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> Subject: Re: [RFC v1 PATCH 1/3] drivers: soc: add support for soc_device_match
> returning -EPROBE_DEFER
>
> First comment overall for the whole serie:
> Since it is the solution I had suggested when I reported the problem[1] I have no
> qualm on the approach, comments for individual patches follow.
>
> [1] http://lore.kernel.org/r/YGGZJjAxA1IO+/VU@atmark-techno.com
>
>
> Alice Guo (OSS) wrote on Mon, Apr 19, 2021 at 12:27:20PM +0800:
> > From: Alice Guo <alice.guo@nxp.com>
> >
> > In i.MX8M boards, the registration of SoC device is later than caam
> > driver which needs it. Caam driver needs soc_device_match to provide
> > -EPROBE_DEFER when no SoC device is registered and no
> > early_soc_dev_attr.
>
> This patch should be last in the set: you can't have soc_device_match return an
> error before its callers handle it.
>
> > Signed-off-by: Alice Guo <alice.guo@nxp.com>
>
> As the one who reported the problem I would have been appreciated being at
> least added to Ccs... I only happened to notice you posted this by chance.

Sorry. I will Cc you next time.

> There is also not a single Fixes tag -- I believe this commit should have Fixes:
> 7d981405d0fd ("soc: imx8m: change to use platform driver") but I'm not sure
> how such tags should be handled in case of multiple patches fixing something.

I only mentioned "soc: imx8m: change to use platform driver" in cover letter.
If it is acceptable to make such a modification, I will send non-RFC and add Fixes tag.

Best Regards,
Alice

> --
> Dominique