Messages in this thread | | | From | Bjorn Helgaas <> | Subject | [PATCH v2 0/3] PCI/PM: Always disable PTM for all devices during suspend | Date | Fri, 2 Sep 2022 18:35:40 -0500 |
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From: Bjorn Helgaas <bhelgaas@google.com>
We currently disable PTM for Root Ports during suspend. Leaving PTM enabled for downstream devices causes UR errors if they send PTM Requests. The intent of this series is to:
- Unconditionally disable PTM during suspend (even if the driver saves its own state) by moving the disable from pci_prepare_to_sleep() to pci_pm_suspend().
- Disable PTM for all devices by removing the Root Port condition and doing it early in the suspend paths.
- Explicitly re-enable PTM during resume, which requires new support in pci_enable_ptm() for Root Ports and Switch Upstream Ports.
Bjorn Helgaas (3): PCI/PTM: Preserve PTM Root Select PCI/PTM: Implement pci_enable_ptm() for Root Ports, Switch Upstream Ports PCI/PM: Always disable PTM for all devices during suspend
drivers/pci/pci-driver.c | 14 ++++++++++++++ drivers/pci/pci.c | 20 -------------------- drivers/pci/pcie/ptm.c | 36 ++++++++++++++++++++++++++++-------- 3 files changed, 42 insertions(+), 28 deletions(-)
-- 2.25.1
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