[BUG] Rockchip SPI: Runtime PM usage count underflow!

[Diederik de Haas]

On Mon Aug 19, 2024 at 3:14 PM CEST, Vicente Bergas wrote:
> On Mon, Aug 19, 2024 at 2:49 PM Vicente Bergas <vicencb at gmail.com> wrote:
> > On Mon, Aug 19, 2024 at 4:12 AM Vicente Bergas <vicencb at gmail.com> wrote:
> > > > i am a user of the CONFIG_SPI_SPIDEV device.
> > > > It stopped working between 6.8 and 6.10.5.
> > > > The SPI bus itself reports no errors to userspace, but no devices
> > > > appear connected to the bus.
> > > > The platform used is RK3328.
> > > > The only spi-related message in dmesg is:
> > > > rockchip-spi ff190000.spi: Runtime PM usage count underflow!

FWIW: I've seen this issue as well.

> > Added:
> > Huang-Huang Bao <i at eh5.me>
> > Linus Walleij <linus.walleij at linaro.org>
> > Sasha Levin <sashal at kernel.org>
> >
> > The first offending commit is:
> > 29d8101fb9442544077e68e27839a1979f85633d pinctrl: rockchip: fix pinmux
> > bits for RK3328 GPIO2-B pins
> >
> > I've also tested 6.10.6 with it reverted (and
> > 456447ff1fe3c28e2fd7b57a79650f62245c6428 and
> > 7127c68c76f120367b9a5053f524df0b603d4a48 as dependencies) and SPI
> > works fine.
>
> Sorry for the noise:
> reverting only 29d8101fb9442544077e68e27839a1979f85633d makes it work on 6.10.6.
> Ignore what i said about 456447ff1fe3c28e2fd7b57a79650f62245c6428 and
> 7127c68c76f120367b9a5053f524df0b603d4a48.

Please try if unreverting that commit and adding the following:
https://lore.kernel.org/linux-rockchip/20240709105428.1176375-1-i@eh5.me/

fixes the issue as well.
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