Re: linusw/devel boot bisection: v5.4-rc1-31-g6a41b6c5fc20 on rk3399-puma-haikou

[Chris Packham <Chris.Packham@xxxxxxxxxxxxxxxxxxx>]

On Thu, 2019-10-31 at 11:41 -0700, kernelci.org bot wrote:
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> * This automated bisection report was sent to you on the basis  *
> * that you may be involved with the breaking commit it has      *
> * found.  No manual investigation has been done to verify it,   *
> * and the root cause of the problem may be somewhere else.      *
> *                                                               *
> * If you do send a fix, please include this trailer:            *
> *   Reported-by: "kernelci.org bot" <bot@xxxxxxxxxxxx>          *
> *                                                               *
> * Hope this helps!                                              *
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> 
> linusw/devel boot bisection: v5.4-rc1-31-g6a41b6c5fc20 on rk3399-puma-haikou
> 
> Summary:
>   Start:      6a41b6c5fc20 gpio: Add xgs-iproc driver
>   Details:    https://kernelci.org/boot/id/5dbb12bf59b514404f60ee79
>   Plain log:  https://storage.kernelci.org//linusw/devel/v5.4-rc1-31-g6a41b6c5fc20/arm64/defconfig/gcc-8/lab-theobroma-systems/boot-rk3399-puma-haikou.txt
>   HTML log:   https://storage.kernelci.org//linusw/devel/v5.4-rc1-31-g6a41b6c5fc20/arm64/defconfig/gcc-8/lab-theobroma-systems/boot-rk3399-puma-haikou.html
>   Result:     6a41b6c5fc20 gpio: Add xgs-iproc driver
> 
> Checks:
>   revert:     PASS
>   verify:     PASS
> 
> Parameters:
>   Tree:       linusw
>   URL:        https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git/
>   Branch:     devel
>   Target:     rk3399-puma-haikou
>   CPU arch:   arm64
>   Lab:        lab-theobroma-systems
>   Compiler:   gcc-8
>   Config:     defconfig
>   Test suite: boot
> 
> Breaking commit found:
> 
> -------------------------------------------------------------------------------
> commit 6a41b6c5fc20abced88fa0eed42ae5e5cb70b280
> Author: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
> Date:   Fri Oct 25 09:27:03 2019 +1300
> 
>     gpio: Add xgs-iproc driver
>     
>     This driver supports the Chip Common A GPIO controller present on a
>     number of Broadcom switch ASICs with integrated SoCs. The controller is
>     similar to the pinctrl-nsp-gpio and pinctrl-iproc-gpio blocks but
>     different enough that a separate driver is required.
>     
>     This has been ported from Broadcom's XLDK 5.0.3 retaining only the CCA
>     support (pinctrl-iproc-gpio covers CCB).
>     
>     Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
>     Link: https://lore.kernel.org/r/20191024202703.8017-3-chris.packham@xxxxxxxxxxxxxxxxxxx
>     Acked-by: Scott Branden <scott.branden@xxxxxxxxxxxx>
>     Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Hmm,

I don't see how this commit would have caused the oops. The new driver
shouldn't (and doesn't appear to be) run on any platform as nothing
declares .compatible = "brcm,iproc-gpio-cca" (yet).