From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: usb: core: Add "quirks" parameter for usbcore From: Oliver Neukum Message-Id: <1512556084.12461.3.camel@suse.com> Date: Wed, 06 Dec 2017 11:28:04 +0100 To: Kai-Heng Feng , gregkh@linuxfoundation.org Cc: corbet@lwn.net, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org List-ID: QW0gTWl0dHdvY2gsIGRlbiAwNi4xMi4yMDE3LCAxNzowOSArMDgwMCBzY2hyaWViIEthaS1IZW5n IEZlbmc6Cj4gTm93IHVzZXJzIGNhbiB1c2UgInVzYmNvcmUucXVpcmtzPSIgYXMgc2hvcnQgdGVy bSB3b3JrYXJvdW5kIGJlZm9yZSB0aGUKPiBuZXh0IGtlcm5lbCByZWxlYXNlLgo+IAo+IFRoaXMg aXMgaW5zcGlyZWQgYnkgdXNiaGlkIGFuZCB1c2Itc3RvcmFnZS4KCkhpLAoKaWYgeW91IGluY2x1 ZGUgdGhpcyBmb3IgZGVidWdnaW5nIHB1cnBvc2VzLCBpdCB3b3VsZCBiZSBpbnRlcmVzdGluZwp0 byBiZSBhYmxlIHRvIG5vdCBvbmx5IHN3aXRjaCBvbiBhIHF1aXJrIGZyb20gdGhlIGNvbW1hbmQg bGluZSwgYnV0CnRvIGFsc28gc3dpdGNoIGl0IG9mZi4gU28gaXQgbWlnaHQgYmUgYmV0dGVyIHRv IGRldGVjdCB0aGUgZHluYW1pYwpxdWlya3MgYWZ0ZXIgdGhlIHN0YXRpYyBxdWlya3MgYW5kIHVz ZSBYT1IuCgoJUmVnYXJkcwoJCU9saXZlcgotLS0KVG8gdW5zdWJzY3JpYmUgZnJvbSB0aGlzIGxp c3Q6IHNlbmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlIGxpbnV4LXVzYiIgaW4KdGhlIGJvZHkgb2Yg YSBtZXNzYWdlIHRvIG1ham9yZG9tb0B2Z2VyLmtlcm5lbC5vcmcKTW9yZSBtYWpvcmRvbW8gaW5m byBhdCAgaHR0cDovL3ZnZXIua2VybmVsLm9yZy9tYWpvcmRvbW8taW5mby5odG1sCg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755066AbdLFK2J (ORCPT ); Wed, 6 Dec 2017 05:28:09 -0500 Received: from mx2.suse.de ([195.135.220.15]:58132 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754870AbdLFK2H (ORCPT ); Wed, 6 Dec 2017 05:28:07 -0500 Message-ID: <1512556084.12461.3.camel@suse.com> Subject: Re: [PATCH] usb: core: Add "quirks" parameter for usbcore From: Oliver Neukum To: Kai-Heng Feng , gregkh@linuxfoundation.org Cc: corbet@lwn.net, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Date: Wed, 06 Dec 2017 11:28:04 +0100 In-Reply-To: <20171206090932.11260-1-kai.heng.feng@canonical.com> References: <20171206090932.11260-1-kai.heng.feng@canonical.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Mittwoch, den 06.12.2017, 17:09 +0800 schrieb Kai-Heng Feng: > Now users can use "usbcore.quirks=" as short term workaround before the > next kernel release. > > This is inspired by usbhid and usb-storage. Hi, if you include this for debugging purposes, it would be interesting to be able to not only switch on a quirk from the command line, but to also switch it off. So it might be better to detect the dynamic quirks after the static quirks and use XOR. Regards Oliver