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 DC8844A3852; Wed, 30 Sep 2026 10:49:45 +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=1790765392; cv=none; b=nJkDsaVIILDISg0m8YwQYw8N4piLJjAQV2NHYvVCEt2tNCsj44/1hVtD/b4qRidFZlrY2KaptQSY+Vfky3JZtgeoBNPz8OREz6qtMmt0/Sye7F2XPCCCzCDBYQ8SSgs1Bc7ORbm72Fr5dooiG6jtpsIrEq3fG2OyWeItiWy8kv0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790765392; c=relaxed/simple; bh=Jz0/8ZHw/kkdqwFZK0OizVEpGXP+LoJhxCfXO4qOcSs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TuXQgiBjfk20ASuCmyR10V/ohcXGtsj28mowAYv5nqPbzx39zeiBqQa2z8Ee+TjqR4pcavhKsUw3xEioHlCsh+8HDSLdX6Glt6iDDX19KBOrCet1aI8u0mD6GxkfWrT+n8Nq48DJ6rZyd/6gBguDLL75vf5YUJDqVoWcbtK1A8Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=RkMfxicT; 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="RkMfxicT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19B331F000FF; Wed, 30 Sep 2026 10:49:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790765384; bh=LknKOLWSgRmkchGwYCTBmhEW31ADjKPwu2ueY29P57A=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=RkMfxicTF4kBdg7duvlizPLIh9Xd4nbijZ3ZrNO7dzc2/juzCuTNFstEpgHZwNRz/ eCAwumNvu1mZNHfd4mwKaCu/XP2W3ZsVtrevVthlJMDTwfJ1hN1C1k0AXcRfQZt7tQ WVz4DIUrLBeA73nYL4LOc3LgLwwi1APlpJswVYwE= Date: Wed, 30 Sep 2026 12:49:38 +0200 From: Greg Kroah-Hartman 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: <2026093012-paralyze-amniotic-65b8@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 02:40:34AM -0700, 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 1234567..89abcdef 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 }, Shouldn't this be in sorted order? And isn't this a v2 patch? thanks, greg k-h