diff options
Diffstat (limited to 'drivers/usb/core/quirks.c')
| -rw-r--r-- | drivers/usb/core/quirks.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index dfc5418ea10..f384edf35b4 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -97,4 +97,16 @@ void usb_detect_quirks(struct usb_device *udev) if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) udev->autosuspend_disabled = 1; #endif + +#ifdef CONFIG_PM + /* Hubs are automatically enabled for USB-PERSIST */ + if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) + udev->persist_enabled = 1; +#else + /* In the absense of PM, we can safely enable USB-PERSIST + * for all devices. It will affect things like hub resets + * and EMF-related port disables. + */ + udev->persist_enabled = 1; +#endif /* CONFIG_PM */ } |