diff options
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/hub.c | 46 | ||||
| -rw-r--r-- | drivers/usb/core/quirks.c | 3 |
2 files changed, 47 insertions, 2 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 8eb4da3..94789be 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -644,6 +644,48 @@ static void hub_stop(struct usb_hub *hub) #ifdef CONFIG_PM +/* Try to identify which devices need USB-PERSIST handling */ +static int persistent_device(struct usb_device *udev) +{ + int i; + int retval; + struct usb_host_config *actconfig; + + /* Explicitly not marked persistent? */ + if (!udev->persist_enabled) + return 0; + + /* No active config? */ + actconfig = udev->actconfig; + if (!actconfig) + return 0; + + /* FIXME! We should check whether it's open here or not! */ + + /* + * Check that all the interface drivers have a + * 'reset_resume' entrypoint + */ + retval = 0; + for (i = 0; i < actconfig->desc.bNumInterfaces; i++) { + struct usb_interface *intf; + struct usb_driver *driver; + + intf = actconfig->interface[i]; + if (!intf->dev.driver) + continue; + driver = to_usb_driver(intf->dev.driver); + if (!driver->reset_resume) + return 0; + /* + * We have at least one driver, and that one + * has a reset_resume method. + */ + retval = 1; + } + return retval; +} + static void hub_restart(struct usb_hub *hub, int type) { struct usb_device *hdev = hub->hdev; @@ -689,8 +731,8 @@ static void hub_restart(struct usb_hub *hub, int type) * turn off the various status changes to prevent * khubd from disconnecting it later. */ - if (udev->persist_enabled && status == 0 && - !(portstatus & USB_PORT_STAT_ENABLE)) { + if (status == 0 && !(portstatus & USB_PORT_STAT_ENABLE) && + persistent_device(udev)) { if (portchange & USB_PORT_STAT_C_ENABLE) clear_port_feature(hub->hdev, port1, USB_PORT_FEAT_C_ENABLE); diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 3da1ab4..c070b34 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -47,6 +47,9 @@ static const struct usb_device_id usb_quirk_list[] = { /* Edirol SD-20 */ { USB_DEVICE(0x0582, 0x0027), .driver_info = USB_QUIRK_RESET_RESUME }, + /* appletouch */ + { USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME }, + /* Avision AV600U */ { USB_DEVICE(0x0638, 0x0a13), .driver_info = USB_QUIRK_STRING_FETCH_255 }, |