6.6-stable review patch. If anyone has any objections, please let me know.
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From: Basavaraj Natikar Basavaraj.Natikar@amd.com
commit a5d6264b638efeca35eff72177fd28d149e0764b upstream.
Use the low-power states of the underlying platform to enable runtime PM. If the platform doesn't support runtime D3, then enabling default RPM will result in the controller malfunctioning, as in the case of hotplug devices not being detected because of a failed interrupt generation.
Cc: Mario Limonciello mario.limonciello@amd.com Signed-off-by: Basavaraj Natikar Basavaraj.Natikar@amd.com Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20231019102924.2797346-16-mathias.nyman@linux.inte... Cc: Oleksandr Natalenko oleksandr@natalenko.name Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-pci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -695,7 +695,9 @@ static int xhci_pci_probe(struct pci_dev /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */ pm_runtime_put_noidle(&dev->dev);
- if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW) + if (pci_choose_state(dev, PMSG_SUSPEND) == PCI_D0) + pm_runtime_forbid(&dev->dev); + else if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW) pm_runtime_allow(&dev->dev);
dma_set_max_seg_size(&dev->dev, UINT_MAX);