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[v3,0/2] Don't make noise about disconnected USB4 devices

Message ID 20250620025535.3425049-1-superm1@kernel.org
Headers show
Series Don't make noise about disconnected USB4 devices | expand

Message

Mario Limonciello June 20, 2025, 2:55 a.m. UTC 
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(-)