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From: Mario Limonciello <superm1@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>,
	linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM)
Cc: linux-pm@vger.kernel.org,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Mario Limonciello <mario.limonciello@amd.com>
Subject: [PATCH v3 0/2] Don't make noise about disconnected USB4 devices
Date: Thu, 19 Jun 2025 21:55:33 -0500	[thread overview]
Message-ID: <20250620025535.3425049-1-superm1@kernel.org> (raw)

From: Mario Limonciello <mario.limonciello@amd.com>

When a USB4 or TBT3 dock is disconnected a lot of warnings and errors
are emitted related to the PCIe tunnels in the dock.

The messages are loud, but it's mostly because the functions that
emit the messages don't check whether the device is actually alive.
The PCIe hotplug services mark the device disconnected, so that
can be used to avoid an unnecessary wakeup on a disconnected device.

There is also a case of a runtime PM imbalance from this situation that
is fixed.

v2: https://lore.kernel.org/linux-pci/20250616192813.3829124-1-superm1@kernel.org/

Mario Limonciello (2):
  PCI/PM: Skip resuming to D0 if disconnected
  PCI: Fix runtime PM usage count underflow on device unplug

 drivers/pci/pci-driver.c | 3 ---
 drivers/pci/pci.c        | 5 +++++
 drivers/pci/pci.h        | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

-- 
2.43.0


             reply	other threads:[~2025-06-20  2:55 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-20  2:55 Mario Limonciello [this message]
2025-06-20  2:55 ` [PATCH v3 1/2] PCI/PM: Skip resuming to D0 if disconnected Mario Limonciello
2025-06-23 17:48   ` Lukas Wunner
2025-06-20  2:55 ` [PATCH v3 2/2] PCI: Fix runtime PM usage count underflow on device unplug Mario Limonciello
2025-06-21 19:05   ` Lukas Wunner
2025-06-21 19:56     ` Mario Limonciello
2025-06-22  4:43       ` Lukas Wunner
2025-06-22 18:39         ` Mario Limonciello
2025-06-23  1:47           ` Mario Limonciello
2025-06-23  6:53             ` Lukas Wunner
2025-06-23  6:43           ` Lukas Wunner
2025-06-23  7:37             ` Lukas Wunner
2025-06-23 10:05               ` Lukas Wunner
2025-06-23 10:11                 ` Rafael J. Wysocki
2025-06-23 11:37                   ` Mario Limonciello
2025-06-23 12:19                     ` Lukas Wunner
2025-06-23 12:45                       ` Mario Limonciello
2025-06-23 17:23                     ` Lukas Wunner
2025-06-23 17:25                       ` Mario Limonciello

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