This patch (as1434) cleans up the uses of usb_mark_last_busy() in usbcore. The function will be called when a device is resumed and whenever a usage count is decremented. A call that was missing from the hub driver is added: A hub is used whenever one of its ports gets suspended (this prevents hubs from suspending immediately after their last child). In addition, the call to disable autosuspend support for new devices by default is moved from usb_detect_quirks() (where it doesn't really belong) into usb_new_device() along with all the other runtime-PM initializations. Finally, an extra pm_runtime_get_noresume() is added to prevent new devices from autosuspending while they are being registered. Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> --- Index: usb-2.6/drivers/usb/core/driver.c =================================================================== --- usb-2.6.orig/drivers/usb/core/driver.c +++ usb-2.6/drivers/usb/core/driver.c @@ -1261,6 +1261,7 @@ static int usb_resume_both(struct usb_de udev->reset_resume); } } + usb_mark_last_busy(udev); done: dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); @@ -1328,7 +1329,6 @@ int usb_resume(struct device *dev, pm_me pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); - usb_mark_last_busy(udev); do_unbind_rebind(udev, DO_REBIND); } } @@ -1660,11 +1660,6 @@ static int usb_runtime_suspend(struct de return -EAGAIN; status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND); - - /* Prevent the parent from suspending immediately after */ - if (status == 0 && udev->parent) - usb_mark_last_busy(udev->parent); - return status; } @@ -1677,7 +1672,6 @@ static int usb_runtime_resume(struct dev * and all its interfaces. */ status = usb_resume_both(udev, PMSG_AUTO_RESUME); - usb_mark_last_busy(udev); return status; } Index: usb-2.6/drivers/usb/core/hub.c =================================================================== --- usb-2.6.orig/drivers/usb/core/hub.c +++ usb-2.6/drivers/usb/core/hub.c @@ -1803,9 +1803,15 @@ int usb_new_device(struct usb_device *ud /* Tell the runtime-PM framework the device is active */ pm_runtime_set_active(&udev->dev); + pm_runtime_get_noresume(&udev->dev); pm_runtime_use_autosuspend(&udev->dev); pm_runtime_enable(&udev->dev); + /* By default, forbid autosuspend for all devices. It will be + * allowed for hubs during binding. + */ + usb_disable_autosuspend(udev); + err = usb_enumerate_device(udev); /* Read descriptors */ if (err < 0) goto fail; @@ -1831,6 +1837,8 @@ int usb_new_device(struct usb_device *ud } (void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev); + usb_mark_last_busy(udev); + pm_runtime_put_sync_autosuspend(&udev->dev); return err; fail: @@ -2221,6 +2229,7 @@ int usb_port_suspend(struct usb_device * usb_set_device_state(udev, USB_STATE_SUSPENDED); msleep(10); } + usb_mark_last_busy(hub->hdev); return status; } Index: usb-2.6/drivers/usb/core/quirks.c =================================================================== --- usb-2.6.orig/drivers/usb/core/quirks.c +++ usb-2.6/drivers/usb/core/quirks.c @@ -117,15 +117,6 @@ void usb_detect_quirks(struct usb_device dev_dbg(&udev->dev, "USB quirks for this device: %x\n", udev->quirks); -#ifdef CONFIG_USB_SUSPEND - - /* By default, disable autosuspend for all devices. The hub driver - * will enable it for hubs. - */ - usb_disable_autosuspend(udev); - -#endif - /* For the present, all devices default to USB-PERSIST enabled */ #if 0 /* was: #ifdef CONFIG_PM */ /* Hubs are automatically enabled for USB-PERSIST */ -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
