* [me: Does Rockchip RK808 driver unload work as intended?]
@ 2018-10-30 11:57 Matti Vaittinen
0 siblings, 0 replies; only message in thread
From: Matti Vaittinen @ 2018-10-30 11:57 UTC (permalink / raw)
To: kernelnewbies
Hello Peeps!
Few months ago I sent question below to clk mailing list. I got zero
replies so I took that as a hint that I am mistaken =) Hence I resend
same question to this list - perhaps this is a better place to search
for answer to (simple) question like this.
----- Forwarded message from Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> -----
> Date: Fri, 7 Sep 2018 13:19:40 +0300
> From: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> To: zyw at rock-chips.com, mturquette at baylibre.com, sboyd at kernel.org, w.egorov at phytec.de
> Cc: linux-clk at vger.kernel.org, linux-kernel at vger.kernel.org
> Subject: Does Rockchip RK808 driver unload work as intended?
> User-Agent: Mutt/1.9.2 (2017-12-15)
>
> Hi dee Ho peeps,
>
> I was browsing through the clk drivers as I tried to do some cleaning.
> Few days ago I submitted a patch which would add devm variants for
> clkdev lookup registration. I also added devm of_provider registration
> for cases where it is actually the parent device which contains clock
> definitions in DT. This seems to be quite typical for MFDs.
>
> While doing this I hit to Rockchip RK808 driver which seems to utilize
> oarent device (MFD dev) for pretty much all devm releasing. I wonder if
> this is safe? What happens if one tries to remove the RK808 clk module?
>
> I guess the clk deregistration and cleanups are not ran as parent device
> stays there, right? But is the clk module and clk module code still
> unload? So won't clk operation pointers registered to clk core become
> invalid?
>
> I guess I don't have any HW to test this mnyself. And as the driver has
> been there since 2014 - well, chances are the driver does work and I
> just don't get it =)
>
> So can someone please shed some light on this? Is this a bug or am I
> just plain wrong?
>
> Br,
> Matti Vaittinen
----- End forwarded message -----
--
Matti Vaittinen
ROHM Semiconductors
~~~ "I don't think so," said Rene Descartes. Just then, he vanished ~~~
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