linux-kernel - Re: [PATCH] PCI: dwc: Added link up check in map_bus of dw_child_pcie

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Message-ID: <CA+G9fYsubwpT9HY7Dx-+zvYdM1t1m+mrnH8WfHJ-_BpMTt40vA@mail.gmail.com>
Date:   Thu, 8 Oct 2020 20:16:57 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Zhiqiang.Hou@....com, Rob Herring <robh@...nel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Michael Walle <michael@...le.cc>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        PCI <linux-pci@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: [PATCH] PCI: dwc: Added link up check in map_bus of dw_child_pcie_ops

On Fri, 2 Oct 2020 at 14:59, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> On Thu, 1 Oct 2020 at 22:16, Michael Walle <michael@...le.cc> wrote:
> >
> > Am 2020-10-01 15:32, schrieb Kishon Vijay Abraham I:
> >
> > > Meanwhile would it be okay to add linkup check atleast for DRA7X so
> > > that
> > > we could have it booting in linux-next?
> >
> > Layerscape SoCs (at least the LS1028A) are also still broken in
> > linux-next,
> > did I miss something here?
>
> I have been monitoring linux next boot and functional testing on nxp devices
> for more than two week and still the problem exists on nxp-ls2088.
>
> Do you mind checking the possibilities to revert bad patches on linux next tree
> and continue to work on fixes please ?
>
> suspected bad commit: [ I have not bisected this problem ]
> c2b0c098fbd1 ("PCI: dwc: Use generic config accessors")
>
> crash log snippet:
> [    1.563008] SError Interrupt on CPU5, code 0xbf000002 -- SError
> [    1.563010] CPU: 5 PID: 1 Comm: swapper/0 Not tainted
> 5.9.0-rc7-next-20201001 #1
> [    1.563011] Hardware name: Freescale Layerscape 2088A RDB Board (DT)
> [    1.563013] pstate: 20000085 (nzCv daIf -PAN -UAO -TCO BTYPE=--)
> [    1.563014] pc : pci_generic_config_read+0x44/0xe8
> [    1.563015] lr : pci_generic_config_read+0x2c/0xe8


This reported issue is gone now on Linux next master branch.
I am not sure which is a fix commit.

- Naresh