Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port into host-only and core structures

From	Peter Senna Tschudin <peter.senna@collabora.com>
Newsgroups	linux.kernel
Subject	Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port into host-only and core structures
Date	2017-05-10 16:20 +0200
Message-ID	<tFAD7-1LQ-11@gated-at.bofh.it> (permalink)
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On Wed, May 10, 2017 at 03:32:19PM +0200, Lucas Stach wrote:
> Am Mittwoch, den 10.05.2017, 10:27 -0300 schrieb Fabio Estevam:
> > On Wed, May 10, 2017 at 10:17 AM, Peter Senna Tschudin
> > <peter.senna@collabora.com> wrote:
> > > On Tue, May 09, 2017 at 07:21:24AM -0300, Fabio Estevam wrote:
> > >> Hi Peter,
> > >>
> > >> On Tue, May 9, 2017 at 3:34 AM, Peter Senna Tschudin
> > >> <peter.senna@collabora.com> wrote:
> > >>
> > >> > Something that ocurred to me is that u-boot is initializing the PCI, and
> > >> > the PCI networkd cards.  Ideally this should not affect anything, but
> > >> > can this be related to the issue?
> > >>
> > >> Yes, in order to narrow things down: please boot 4.11 without PCI
> > >> support in U-Boot.
> > >
> > > Yes, removing the PCI code from u-boot makes 4.11 to boot. But latest
> > > next still hangs.
> > 
> > Ok, good. At least we see the same behaviour now.
> > 
> > We still need a fix for the mx6q hang on systems with PCI switch for
> > linux/next or 4.12-rc1.
> 
> I will take a look at this today.

I'll be more than happy to help. Let me know if you need testing or any
other thing.

> 
> > 
> > >> The problem is that mx6q does not have a way to properly reset the PCI block.
> > >>
> > >> On the board I tested there is no PCI support in U-Boot.
> > >>
> > >> Maybe we need the following approach in U-Boot as Lucas did for Barebox:
> > >> https://git.pengutronix.de/cgit/barebox/commit/?id=f1da98da2760c21487bbba8f7fb957c843a22896
> > >
> > > Maybe we do need, but the kernel is working on v4.10 for our use case,
> > > and it is not working any longer on v4.11. What is the way to continue
> > > from here?
> > 
> > There is no other way other than fixing U-Boot on this case.
> 
> You could also revert the change in the kernel if you are absolutely
> sure that this won't cause issues on your system (you are not using the
> internal watchdog etc.).
> 
> But for the long run and to make sure that _all_ use-cases work
> properly, there is no way around fixing your bootloader to behave
> correctly.

Thanks!

> 
> Regards,
> Lucas
>

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Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port into  host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 17:10 +0200
  Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Joao Pinto <Joao.Pinto@synopsys.com> - 2017-05-08 17:20 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Kishon Vijay Abraham I <kishon@ti.com> - 2017-05-08 17:30 +0200
      Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Joao Pinto <Joao.Pinto@synopsys.com> - 2017-05-08 17:40 +0200
        Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Kishon Vijay Abraham I <kishon@ti.com> - 2017-05-08 17:50 +0200
  Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Kishon Vijay Abraham I <kishon@ti.com> - 2017-05-08 17:50 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Kishon Vijay Abraham I <kishon@ti.com> - 2017-05-08 18:00 +0200
      Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 19:20 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 18:20 +0200
  Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lucas Stach <l.stach@pengutronix.de> - 2017-05-08 18:40 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 18:50 +0200
      Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lucas Stach <l.stach@pengutronix.de> - 2017-05-08 18:50 +0200
        Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 19:00 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-05-08 20:00 +0200
      Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-08 22:40 +0200
        Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-05-09 18:30 +0200
  Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-05-08 20:30 +0200
  Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Fabio Estevam <festevam@gmail.com> - 2017-05-09 03:40 +0200
    Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-09 08:40 +0200
      Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Fabio Estevam <festevam@gmail.com> - 2017-05-09 12:30 +0200
        Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-10 15:20 +0200
          Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Fabio Estevam <festevam@gmail.com> - 2017-05-10 15:30 +0200
            Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Lucas Stach <l.stach@pengutronix.de> - 2017-05-10 15:40 +0200
              Re: Regression: 442ec4c04d1: PCI: dwc: all: Split struct pcie_port  into host-only and core structures Peter Senna Tschudin <peter.senna@collabora.com> - 2017-05-10 16:20 +0200

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