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commit b361663c5a40c8bc758b7f7f2239f7a192180e7c upstream. Recently ASPM handling was changed to allow ASPM on PCIe-to-PCI/PCI-X bridges. Unfortunately the ASMedia ASM1083/1085 PCIe to PCI bridge device doesn't seem to function properly with ASPM enabled. On an Asus PRIME H270-PRO motherboard, it causes errors like these: pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID) pcieport 0000:00:1c.0: AER: device [8086:a292] error status/mask=00003000/00002000 pcieport 0000:00:1c.0: AER: [12] Timeout pcieport 0000:00:1c.0: AER: Corrected error received: 0000:00:1c.0 pcieport 0000:00:1c.0: AER: can't find device of ID00e0 In addition to flooding the kernel log, this also causes the machine to wake up immediately after suspend is initiated. The device advertises ASPM L0s and L1 support in the Link Capabilities register, but the ASMedia web page for ASM1083 [1] claims "No PCIe ASPM support". Windows 10 (build 2004) enables L0s, but it also logs correctable PCIe errors. Add a quirk to disable ASPM for this device. [1] https://www.asmedia.com.tw/eng/e_show_products.php?cate_index=169&item=114 [bhelgaas: commit log] Fixes: 66ff14e59e8a ("PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges") Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=208667 Link: https://lore.kernel.org/r/20200722021803.17958-1-hancockrwd@gmail.com Signed-off-by: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.