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SubjectRe: [RFC PATCH v2] xhci: Prevent runtime pm from autosuspending during initialization
On Mon, Feb 24, 2014 at 8:29 AM, Mathias Nyman
<> wrote:
> xHCI driver has its own pci probe function that will call usb_hcd_pci_probe
> to register its usb-2 bus, and then continue to manually register the
> usb-3 bus. usb_hcd_pci_probe does a pm_runtime_put_noidle at the end and
> might thus trigger a runtime suspend before the usb-3 bus is ready.
> Prevent the runtime suspend by increasing the usage count in the
> beginning of xhci_pci_probe, and decrease it once the usb-3 bus is
> ready.
> xhci-platform driver is not using usb_hcd_pci_probe to set up
> busses and should not need to have it's usage count increased during probe.
> Signed-off-by: Mathias Nyman <>

Acked-by: Dan Williams <>

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