Subject: Re: [PATCH 01/10] PCI: save pci_bus pointer in pcie_port structure

From: Jisheng Zhang <[email-masked]>
Date: Thu, 28 Mar 2019 07:18:03 +0000

On Tue, 26 Mar 2019 20:43:18 +0530Vidya Sagar wrote:

> 
> save pci_bus pointer created by PCIe sub-system's
> pci_scan_root_bus_bridge() to be used by host controller drivers for post
> processing. Tegra host controller driver needs it for the following
> reasons
> - to derive pci_host_bridge structure from pci_bus which is used to
> configure iATU's outbound regions for different windows accesses
> - to traverse and configure downstream hierarchy. One such case is,
> configuring all immediate downstream devices to D0 state before transiting
> link to L2 state. Saving pci_bus pointer seems the best method compared to
> deriving it by other means.

hmm, I submitted similar patch for another purpose last month, 

https://patchwork.kernel.org/patch/10830029/

then v3 weeks ago

https://lkml.org/lkml/2019/3/18/375

And get Acks from Gustavo. But it seems that it isn't merged to dwc next
branch in Lorenzo's tree

Maybe Lorenzo have some idea of handling this case.

Thanks

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