On Fri, Jun 26, 2015 at 09:24:07PM +0200, Tom Gundersen wrote:
> This policy used to be unconditionally applied by udev, but there
> is no reason to make userspace be involved in this and in the future
> udev will not be doing it by default.
> 
> See: <https://github.com/systemd/systemd/pull/353>.
> 
> Signed-off-by: Tom Gundersen <t...@jklm.no>
> Cc: Jiri Kosina <jkos...@suse.cz>
> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
> ---
> 
> Hi,
> 
> I don't have the right hardware for this, so it has only been compile-tested.
> I'm therefore sending it as an RFC only. Mainly I want to bring it to people's
> attention that it would be great to get this feature into the kernel as we 
> want
> to drop it from udev.
> 
> Cheers,
> 
> Tom
> 
>  drivers/hid/usbhid/hid-core.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
> index bfbe1be..af80700 100644
> --- a/drivers/hid/usbhid/hid-core.c
> +++ b/drivers/hid/usbhid/hid-core.c
> @@ -1358,6 +1358,9 @@ static int usbhid_probe(struct usb_interface *intf, 
> const struct usb_device_id *
>       setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
>       spin_lock_init(&usbhid->lock);
>  
> +     if (dev->removable == USB_DEVICE_FIXED)
> +             usb_enable_autosuspend(dev);
> +

As this duplicates what udev has been doing for a while now, we should
be safe here.

thanks for the patch.

Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
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