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From:   Bjorn Helgaas <helgaas@kernel.org>
To:     Alexandru Gagniuc <mr.nuke.me@gmail.com>,
        Lukas Wunner <lukas@wunner.de>,
        Alex Williamson <alex.williamson@redhat.com>,
        Austin Bolen <austin_bolen@dell.com>,
        Alexandru Gagniuc <alex_gagniuc@dellteam.com>,
        Keith Busch <keith.busch@intel.com>,
        Shyam Iyer <Shyam_Iyer@dell.com>,
        Sinan Kaya <okaya@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] Revert "PCI/LINK: Report degraded links via link bandwidth
Date:   Mon, 29 Apr 2019 13:56:10 -0500
Message-Id: <20190429185611.121751-1-helgaas@kernel.org>
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Alex W. reported a case where the new link bandwidth notification logging,
e.g.:

  vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 GT/s x16 link)

is somewhat surprising.  The message is great if link bandwidth was reduced
because of a hardware problem, but in this case it's caused by a GPU doing
link state management to conserve power, so the message is to be expected
and is likely to confuse the user.

We haven't figured out a good way to handle both the "hardware failure" and
the "active link management" cases yet, so revert this for now.

Bjorn