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[83.28.44.212]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b79f4498865sm938369566b.17.2025.12.07.14.06.37 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sun, 07 Dec 2025 14:06:38 -0800 (PST) Date: Sun, 7 Dec 2025 23:06:34 +0100 From: Michal Pecio To: Greg KH Cc: Johannes =?UTF-8?B?QnLDvGRlcmw=?= , linux-usb@vger.kernel.org Subject: Re: [PATCH v2] usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor Message-ID: <20251207230634.7b279127.michal.pecio@gmail.com> In-Reply-To: <2025120846-nearby-breath-e5fe@gregkh> References: <2025120708-header-startling-ffaf@gregkh> <20251207012059.7899-1-johannes.bruederl@gmail.com> <20251207084012.7c232e52.michal.pecio@gmail.com> <20251207104505.1d5f3718.michal.pecio@gmail.com> <2025120748-extras-retrain-16eb@gregkh> <2025120846-nearby-breath-e5fe@gregkh> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 8 Dec 2025 06:12:15 +0900, Greg KH wrote: > I'm sure this isn't going to be the only device that can't handle the > BOS descriptor if Windows isn't querying for it I speculated in bugzilla that maybe Windows isn't asking for it, but I doubt it now because BOS is required for LPM. More likely it was simply WinPCAP failing to capture those queries when I tried. lsusb works, so something "fixes" this device - maybe just waiting long enough, maybe using different wLength, mabye getting config descriptors before BOS or setting configuration first, I don't know. Windows in a VM may show you how to do it ;) Regards, Michal