Re: [PATCH] remoteproc/mtk_scp: Move clk ops outside send_lock

[Chen-Yu Tsai]

On Wed, Jan 4, 2023 at 4:31 PM Chen-Yu Tsai <wenst@xxxxxxxxxxxx> wrote:
>
> Clocks are properly reference counted and do not need to be inside the
> lock range.
>
> Right now this triggers a false-positive lockdep warning on MT8192 based
> Chromebooks, through a combination of mtk-scp that has a cros-ec-rpmsg
> sub-device, the (actual) cros-ec I2C adapter registration, I2C client
> (not on cros-ec) probe doing i2c transfers and enabling clocks.
>
> This is a false positive because the cros-ec-rpmsg under mtk-scp does
> not have an I2C adapter, and also each I2C adapter and cros-ec instance
> have their own mutex.
>
> Move the clk operations outside of the send_lock range.

Well this managed to untangle the lockdep warning a bit, but it still
appears. I'll keep looking into it.