diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2025-04-23 23:31:32 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-05-05 18:04:44 -0500 |
| commit | 4d4c10f763d7808fbade28d83d237411603bca05 (patch) | |
| tree | 8740abfacb773940ec777726315da49ee96f85c0 /drivers/pci/pci-driver.c | |
| parent | 0a0829b1fd76cb6110cc049a60e634a51969e488 (diff) | |
PCI: Explicitly put devices into D0 when initializing
AMD BIOS team has root caused an issue that NVMe storage failed to come
back from suspend to a lack of a call to _REG when NVMe device was probed.
112a7f9c8edbf ("PCI/ACPI: Call _REG when transitioning D-states") added
support for calling _REG when transitioning D-states, but this only works
if the device actually "transitions" D-states.
967577b062417 ("PCI/PM: Keep runtime PM enabled for unbound PCI devices")
added support for runtime PM on PCI devices, but never actually
'explicitly' sets the device to D0.
To make sure that devices are in D0 and that platform methods such as
_REG are called, explicitly set all devices into D0 during initialization.
Fixes: 967577b062417 ("PCI/PM: Keep runtime PM enabled for unbound PCI devices")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Denis Benato <benato.denis96@gmail.com>
Tested-By: Yijun Shen <Yijun_Shen@Dell.com>
Tested-By: David Perry <david.perry@amd.com>
Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://patch.msgid.link/20250424043232.1848107-1-superm1@kernel.org
Diffstat (limited to 'drivers/pci/pci-driver.c')
| -rw-r--r-- | drivers/pci/pci-driver.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index c8bd71a739f7..082918ce03d8 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -555,12 +555,6 @@ static void pci_pm_default_resume(struct pci_dev *pci_dev) pci_enable_wake(pci_dev, PCI_D0, false); } -static void pci_pm_power_up_and_verify_state(struct pci_dev *pci_dev) -{ - pci_power_up(pci_dev); - pci_update_current_state(pci_dev, PCI_D0); -} - static void pci_pm_default_resume_early(struct pci_dev *pci_dev) { pci_pm_power_up_and_verify_state(pci_dev); |