On 04/11/2019 15:18, Linus Walleij wrote:

On Thu, Oct 31, 2019 at 8:35 PM Chris Packham
[off-list ref] wrote:

quoted

On Thu, 2019-10-31 at 11:41 -0700, kernelci.org bot wrote:

quoted

quoted

Breaking commit found:

-------------------------------------------------------------------------------
commit 6a41b6c5fc20abced88fa0eed42ae5e5cb70b280
Author: Chris Packham [off-list ref]
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 [off-list ref]
    Link: https://lore.kernel.org/r/20191024202703.8017-3-chris.packham@alliedtelesis.co.nz (local)
    Acked-by: Scott Branden [off-list ref]
    Signed-off-by: Linus Walleij [off-list ref]

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).

I think it looks really bogus as well.

Could it be that these systems are memory constrained such that
the kernel image just exactly right now collides with the upper
memory limit or corrupts its own ramdisk?

I suppose I can't ask the kernel robot to do any more detailed
debugging.

I can't see any problem with this patch.

Yes it's possible that this patch increases the kernel image size
above a threshold that causes the board to fail to boot.  However
that board isn't in the Collabora lab so I don't have direct
access to it.  I'll see what we can do to debug this, will
disable bisections in lab-theobrama-systems for now to avoid more
noise.

Guillaume

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