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Subject: Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port
 into host-only and core structures
From: Lucas Stach <l.stach@pengutronix.de>
To: Peter Senna Tschudin <peter.senna@collabora.com>
Date: Mon, 08 May 2017 18:48:48 +0200
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Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
 Jesper Nilsson <jesper.nilsson@axis.com>, Joao Pinto <Joao.Pinto@synopsys.com>,
 Richard Zhu <hongxing.zhu@nxp.com>,
 Gabriele Paoloni <gabriele.paoloni@huawei.com>,
 Jingoo Han <jingoohan1@gmail.com>, Pratyush Anand <pratyush.anand@gmail.com>,
 linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
 Kishon Vijay Abraham I <kishon@ti.com>,
 Stanimir Varbanov <svarbanov@mm-sol.com>,
 Minghuan Lian <minghuan.Lian@freescale.com>,
 Zhou Wang <wangzhou1@hisilicon.com>, Murali Karicheri <m-karicheri2@ti.com>,
 Niklas Cassel <niklas.cassel@axis.com>, Bjorn Helgaas <bhelgaas@google.com>,
 Mingkai Hu <mingkai.hu@freescale.com>, Roy Zang <tie-fei.zang@freescale.com>,
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Am Montag, den 08.05.2017, 18:44 +0200 schrieb Peter Senna Tschudin:
> On Mon, May 08, 2017 at 06:34:08PM +0200, Lucas Stach wrote:
> > Am Montag, den 08.05.2017, 17:02 +0200 schrieb Peter Senna Tschudin:
> > > Hello Kishon,
> > > 
> > > Our iMX6 hardware (imx6q-b850v3.dts) is not booting with latest
> > > linux-next and I could bisect until:
> > > 
> > > commit 442ec4c04d1235f8c664a74004dae54a7a574d18
> > > Author: Kishon Vijay Abraham I <kishon@ti.com>
> > > Date:   Wed Feb 15 18:48:14 2017 +0530
> > > 
> > >     PCI: dwc: all: Split struct pcie_port into host-only and core structures
> > > 
> > > Which seem to be causing our issues. Our device (imx6q-b850v3.dts) boots
> > > fine with 4.10, and also boots if we disable pcie with:
> > 
> > Are you sure about this bisect? It seems more likely that the secondary
> > bus scanning goes wrong. It seems Lorenzo Pieralisi's cfg space
> > non-posting patches landed in next, so the root cause of this might just
> > be the driver hooking the wrong fault code now.
> > 
> > Async and synchronous aborts are different fault codes on ARM. Can you
> > see of removing the "16 +" in hook_fault_code() in
> > drivers/pci/dwc/pci-imx6.c fixes this issue?
> 
> changing it to:
> 
> hook_fault_code(6, imx6q_pcie_abort_handler, SIGBUS, 0,
> 		"imprecise external abort");
> 
> made no difference, problem persists...

Can you test if 8 or 10 works?

Regards,
Lucas



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