Messages in this thread | | | From | Tomeu Vizoso <> | Date | Mon, 20 Apr 2015 09:11:36 +0200 | Subject | Re: [PATCH v3 2/2] [media] uvcvideo: Remain runtime-suspended at sleeps |
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On 17 April 2015 at 19:32, Alan Stern <stern@rowland.harvard.edu> wrote: > On Fri, 17 Apr 2015, Tomeu Vizoso wrote: > >> When the system goes to sleep and afterwards resumes, a significant >> amount of time is spent suspending and resuming devices that were >> already runtime-suspended. >> >> By setting the power.force_direct_complete flag, the PM core will ignore >> the state of descendant devices and the device will be let in >> runtime-suspend. >> >> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> >> --- >> drivers/media/usb/uvc/uvc_driver.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c >> index 5970dd6..ae75a70 100644 >> --- a/drivers/media/usb/uvc/uvc_driver.c >> +++ b/drivers/media/usb/uvc/uvc_driver.c >> @@ -1945,6 +1945,8 @@ static int uvc_probe(struct usb_interface *intf, >> "supported.\n", ret); >> } >> >> + intf->dev.parent->power.force_direct_complete = true; > > This seems wrong. The uvc driver is bound to intf, not to intf's > parent. So it would be okay for the driver to set > intf->dev.power.force_direct_complete, but it's wrong to set > intf->dev.parent->power.force_direct_complete.
Agreed.
Thanks,
Tomeu
> Alan Stern > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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