[PATCH 5/7] memory: renesas-rpc-if: Move resource acquisition to .probe()

[Geert Uytterhoeven]

Hi Krzysztof,

On Wed, Jun 29, 2022 at 7:44 PM Krzysztof Kozlowski
<krzysztof.kozlowski at linaro.org> wrote:
> On 27/06/2022 17:31, Geert Uytterhoeven wrote:
> > While the acquired resources are tied to the lifetime of the RPC-IF core
> > device (through the use of managed resource functions), the actual
> > resource acquisition is triggered from the HyperBus and SPI child
> > drivers.  Due to this mismatch, unbinding and rebinding the child
> > drivers manually fails with -EBUSY:
> >
> >     # echo rpc-if-hyperflash > /sys/bus/platform/drivers/rpc-if-hyperflash/unbind
> >     # echo rpc-if-hyperflash > /sys/bus/platform/drivers/rpc-if-hyperflash/bind
> >     rpc-if ee200000.spi: can't request region for resource [mem 0xee200000-0xee2001ff]
> >     rpc-if-hyperflash: probe of rpc-if-hyperflash failed with error -16
> >
> > Fix this by moving all resource acquisition to the core driver's probe
> > routine.
> >
> > Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
>
> This looks like a fix, so how about putting it as first in the series,
> so backporting is easy/automatic?

Unfortunately that is not as simple as it sounds, as this really
depends on patch 4.
I agree patches 1-3 could be moved later, if you think it is worthwhile.

> Plus a fixes tag?

It's been like that since forever.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds