From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792649760; b=ktb1uuhiJ2As+uHyOjhjN+FK4HwDgLxx1ZVPYyNg0K9+yTSoKK8s5SnBJY2glhqedx5N MZlOgOSNcYZn6cdn5yXxGA47KOnAEvrwg2uwhtZIX/5FRbYJ1TmHZTc/ffmmElBxJRaVe i1Izq5IcMsr18m6S0rZqd7s93FQ9XTh7cy/Y87CwHWnAlr7gDNrJ3BO88ZtA4/5asQdYA WE72AL03/WBI6KCacxnv1g9h8numETdlXUvUyM7Cmwr8KrFiB6Id/C00MrbLLamzFLQxm Z3Ro6uxD57FMx4xVO4kX7Dn+3y4CZnAlChOk2QVC8xtKG+/2qTfAp/Pt0+jFZiBmx1A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792649760; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=Fvv040Yt3X6Tncl9PyddasEpSaYQNZJ3YnveAkKzmjw=; b=oneoetq38yg5s7E8wwo2sJI13S6lDPoYU05HMzOZOiNOI5QPq2a0P8ZGTvdCmEJsaTkb pSKb5JUYRTVl3dp6g1FmEf67pGCmrIvgTHZbMQORoUP9+9g77y+FJxsiUduvyPfRJ9E7l eOLG9gEfSXwPR7VRGtvnuMEFZLvDmCQGF+inhcMwsiuT1PNvIDWbiPZIrgZfaLurxuoXM BnJPiETOsANSi3fjj/DSHGrEjorXLMRVcY9PR6R+uCAUU9WugNk9j6Ol9HBGBd4bC4nLU pZZsmNtQWEMt8gVCSUZBuOTyosWNEWOdvelwZMZUkAElXYdsqpUtRykXh1nEePX1Yig== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VQWIJ4Q0; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6A23606A319 for ; Thu, 22 Oct 2026 06:15:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VQWIJ4Q0 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 405831F000C1; Thu, 22 Oct 2026 06:15:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792649759; bh=Fvv040Yt3X6Tncl9PyddasEpSaYQNZJ3YnveAkKzmjw=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=VQWIJ4Q0uGNmUQCm6Iv5Pn6fmMQl6w63kI8c0gukClXuwTCLaxyG4dYUpk8n+yHnP oNNDSjWG9142OtWaXyhf7ghkB8Bgh9nxhTIjH9WWQscWR2DidZdPSCHvNQUggTDRn5 suxsfRqWMxV1lDpb6iJ/NvnJWkb3AbTE1M+MeNnT46bpThlfk+aeYJuejRWOnvKf+g mBDLL0upRxguRr98cu4bdx9WngDJMt6G0G0Crh0UAjriTcbi3JbMyz2HxoeM0f9tv8 bT6iJnnwmCG5YwqFv9CkDRjIbg3N1aoyD92P97NfgYGUnbpsC8Jm3JT1Zra0SKidBL C6oyhY31mbVvg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH] USB: quirks: add DEVICE_QUALIFIER quirk for Mobapad C2 Lite gamepad Reply-To: sashiko-reviews@lists.linux.dev To: "Danny Zimmer" Cc: linux-usb@vger.kernel.org In-Reply-To: <20261022061214.3497578-1-dzimmer50@googlemail.com> References: <20261022061214.3497578-1-dzimmer50@googlemail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 22 Oct 2026 06:15:58 +0000 X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > The Mobapad C2 Lite gamepad in its "Xbox 360 Controller for Windows" mode > (USB ID 2345:e06e) fails to enumerate on Linux and enters an endless > connect/reset loop. A USB trace shows the device returns its device > descriptor, but then stalls the Device_Qualifier request and stops > answering any further control transfers, so the host resets it and the > cycle repeats indefinitely. >=20 > The device works on Windows, which does not issue a Device_Qualifier > request. Setting USB_QUIRK_DEVICE_QUALIFIER so the host skips that request > lets the device enumerate normally; the configuration descriptor is then > read at its usual size without problems and the controller binds as an > xpad gamepad. >=20 > Tested on two hosts (x86_64/xhci and Raspberry Pi 3B/dwc_otg). >=20 > Signed-off-by: Danny Zimmer Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261022061214.3497= 578-1-dzimmer50@googlemail.com?part=3D1