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28a6652322
[2.353901] rk-pcie 3c0000000.pcie Link up. LTSSM is 0x1
[2.354036] rk-pcie 3c0000000.pcie: PCI host bridge to bus 0000 :00
[2.354058] pci_bus 0000:00: root bus resource [bus 00-0f]
[2.354074] pci_bus 0000:00: root bus resource [??? 0x4000000-0xf40fffff flags 0x0]
...
The original link event is checking LTSSM and ensure it's in L0. However
enabling ASPM will make accessing config space failed. So commit
824c99261a ("PCI: rockchip: dw: Update link up check state") remove the LTSSM
check. But it introduce a situation that if link still in training and host
bridge tries to enumerate slot, it will fail unexpectedly. Fix this by removing
rk_pcie_link_up and let dwc core use its own port logic to decide the link state.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Change-Id: I41f05a8aa89ac33782d569ffa7d466cf95981c68
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.