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Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP

From Sinan Kaya <okaya@codeaurora.org>
Newsgroups linux.kernel
Subject Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP
Date 2017-08-23 18:00 +0200
Message-ID <uhGeu-2rq-45@gated-at.bofh.it> (permalink)
References (1 earlier) <ugXho-6fz-31@gated-at.bofh.it> <uho7T-7sy-1@gated-at.bofh.it> <uhB58-7JE-11@gated-at.bofh.it> <uhEml-1ex-3@gated-at.bofh.it> <uhG4O-2mD-19@gated-at.bofh.it>
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Hi Oza,

> In working Enumuration case I get following:
> [    9.125976] pci 0000:00:00.0: bridge configuration invalid ([bus
> 00-00]), re-configuring
> [    9.134267] where=0x0 val=0xffff0001
> [    9.146946] where=0x0 val=0xffff0001
> [    9.158943] where=0x0 val=0xffff0001
> [    9.170945] where=0x0 val=0xffff0001
> [    9.186945] where=0x0 val=0xffff0001
> [    9.210944] where=0x0 val=0xffff0001
> [    9.250943] where=0x0 val=0xffff0001
> [    9.322942] where=0x0 val=0xffff0001
> [    9.458943] where=0x0 val=0xffff0001
> [    9.726942] where=0x0 val=0x9538086    >> actual vendor and device id.
> 
> so I think I have to retry in RC driver, so the old code still holds good.
> except that I have to do factoring out
You need to return 0xFFFF0001 for vendor ID register and return 0xFFFFFFFF for
other registers like COMMAND register during the CRS period.

> 
> please let me know If I missed anything, or you want me to try anything else.

Sinan

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Thread

[PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP Oza Pawandeep <oza.oza@broadcom.com> - 2017-08-21 18:00 +0200
  Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from  EP Bjorn Helgaas <helgaas@kernel.org> - 2017-08-22 22:40 +0200
    Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP Oza Oza <oza.oza@broadcom.com> - 2017-08-23 12:30 +0200
      Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from  EP Bjorn Helgaas <helgaas@kernel.org> - 2017-08-23 16:00 +0200
        Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP Oza Oza <oza.oza@broadcom.com> - 2017-08-23 17:50 +0200
          Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from  EP Sinan Kaya <okaya@codeaurora.org> - 2017-08-23 18:00 +0200
            Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP Oza Oza <oza.oza@broadcom.com> - 2017-08-23 18:10 +0200
              Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from  EP Bjorn Helgaas <helgaas@kernel.org> - 2017-08-23 20:10 +0200
                Re: [PATCH v7 1/2] PCI: iproc: Retry request when CRS returned from EP Oza Oza <oza.oza@broadcom.com> - 2017-08-24 06:50 +0200

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