From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5B2C443B6ED; Wed, 30 Sep 2026 06:55:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790751339; cv=none; b=hIuKIsiptjhzSAKZ9I0eaNxed88cD2PBHaueezWcgDVpWC8sQJn9eWGBXzGkCUJ/k+NUQPbZqr7tSIWm3GwJANbWdwLky7TV4XrlNH4PKkdOudgVEjoNgpX5ZvMtQ9A+DVKVTZ7fxD6wB8obfYXzHx/SIFR16YXWpjEVYFH1ibE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790751339; c=relaxed/simple; bh=pOre7b5K8XzdnM1fildbGlPON1gKdmN7i7JeUCpheXA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Fw5TBKVOyPgPa68vvRbNwvZW1M18LmOyLasmeeAF6e1XnIafsB8RtnNh6adHSuMSnU0bO42cDpqc0MBJf+5e0j7T3SsLHpYbKmh10b8bhc2sEabJ9awtesUbyVxO2Df6bYVIEnwa+NcTm7qOneYA+X8POAb/dM7HJnf++3mqFpg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FPL3O/6m; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FPL3O/6m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C5B01F000FF; Wed, 30 Sep 2026 06:55:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790751330; bh=/XAl8sbyoadHlpSpi85xT/Ou78XuJpB2zs90+HIsFbc=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=FPL3O/6miQ6reXKAkqsE4wwlWg29sZvoyvSKu/78DeroeXHc6luHzKzkxtUOI5+0s ZNiGOhxbbdjXu0+RZ/a7NB7h9IOr4tAZkVQ+1QLa5YiwtqePRyPM7RTXrRUPKBk7Xc fGd0Cdb98DXaR9Te2m+vzJI04soNK1bWU4CYD1ZA= Date: Wed, 30 Sep 2026 08:55:27 +0200 From: Greg KH To: David Pieters Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] USB: quirks: add USB_QUIRK_NO_LPM for ELECOM DEFT Pro TrackBall Message-ID: <2026093013-stature-rekindle-ba2a@gregkh> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Sep 30, 2026 at 08:39:06AM +0200, David Pieters wrote: > The 2.4GHz wireless USB receiver of the ELECOM DEFT Pro TrackBall > (056e:0132) and its wired counterpart (056e:0131) fail to handle USB > Link Power Management (LPM / USB 2.0 L1 sleep states) during initial > enumeration on modern USB host controllers. When LPM negotiation occurs > at boot, the device stalls and fails to register any input events until > it is physically unplugged and replugged. > > Applying USB_QUIRK_NO_LPM prevents LPM negotiation and allows the device > to initialize properly at system boot. > > Signed-off-by: David Pieters > --- > drivers/usb/core/quirks.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c > index 8923a10e7b41..0f34e819b22a 100644 > --- a/drivers/usb/core/quirks.c > +++ b/drivers/usb/core/quirks.c > @@ -350,6 +350,10 @@ static const struct usb_device_id usb_quirk_list[] = { > /* Corsair Strafe RGB */ > { USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT }, > > + /* ELECOM DEFT Pro TrackBall (fails on USB Link Power Management) */ > + { USB_DEVICE(0x056e, 0x0131), .driver_info = USB_QUIRK_NO_LPM }, > + { USB_DEVICE(0x056e, 0x0132), .driver_info = USB_QUIRK_NO_LPM }, > + > { } /* terminating entry must be last */ > }; > > -- > 2.43.0 Hi, This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him a patch that has triggered this response. He used to manually respond to these common problems, but in order to save his sanity (he kept writing the same thing over and over, yet to different people), I was created. Hopefully you will not take offence and will fix the problem in your patch and resubmit it so that it can be accepted into the Linux kernel tree. You are receiving this message because of the following common error(s) as indicated below: - Your patch is malformed (tabs converted to spaces, linewrapped, etc.) and can not be applied. Please read the file, Documentation/process/email-clients.rst in order to fix this. If you wish to discuss this problem further, or you have questions about how to resolve this issue, please feel free to respond to this email and Greg will reply once he has dug out from the pending patches received from other developers. thanks, greg k-h's patch email bot