From: Myron Stowe <mstowe@redhat.com>
To: linux-pci@vger.kernel.org
Cc: bhelgaas@google.com, lukas@wunner.de, klimov.linux@gmail.com
Subject: PCIe hot-plug issue: Failed to check link status
Date: Tue, 8 Sep 2020 08:57:26 -0600 [thread overview]
Message-ID: <20200908085726.54509090@zim> (raw)
On a system with a Mellanox Technologies MT27800 Family [ConnectX-5]
NIC controller containing a power button, hot-plug fails to function
properly.
Normal, expected, scenario:
o Press the OCP NIC's power button;
o Power button LED blinks and turns off (delivering event message
to CPU);
o Verify NIC is offline via 'lspci';
o Remove controller.
Scenario with cmdline parameter 'pcie_port_pm=off':
o Press NIC's power button;
o LED turns off;
o Verify NIC is offline;
o Press power button (in an attempt to hot-add controller);
o NIC is not recognized.
Scenario with no cmdline parameter, or ''pcie_aspm=off', or
'pcie_aspm=off pcie_port_pm=off':
o Press NIC's power button;
o LED continuously flashes;
o Checking via 'lspci' indicates NIC is offline but with LED
flashing, the controller can not be removed.
The 'dmesg', and 'lspci', logs are included within the
associated bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=209113
As stated in the bugzilla, I'm relaying all this information second
hand. Hoping to get the affected party involved directly.
next reply other threads:[~2020-09-08 20:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-08 14:57 Myron Stowe [this message]
2020-09-10 13:24 ` PCIe hot-plug issue: Failed to check link status Lukas Wunner
2020-09-14 20:08 ` Myron Stowe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200908085726.54509090@zim \
--to=mstowe@redhat.com \
--cc=bhelgaas@google.com \
--cc=klimov.linux@gmail.com \
--cc=linux-pci@vger.kernel.org \
--cc=lukas@wunner.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.