From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3EA339150B for ; Fri, 17 Jul 2026 19:54:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784318047; cv=none; b=evbm97HuUm8St4nkiynFdlHaMzRFE+VdjujlLwaKBbcy6P0nkZ23IwWzcH8ejcJmxlBq7QVQ64UUC6awYATc25CAS548ijcCQOrovYuhVnykJcqGvXRW0g0E9Q1XKQt6Ot4I56KB2O4aodbkepuORFYT106Qj1S0I+kOAMLu86w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784318047; c=relaxed/simple; bh=qDEL+NdYHAMBArrfQo7xo37wngGQUozp4Fd2l50ofPs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tp0Z/tqATE91d7nbDhmE4Pa0duD/6U+y8qLiXK33dHqBNKTx+EIpMntXFCQUv1GWoq2aHa30Wsen0wmmhEj4xdHep6Dtz94ioKobmsJm0z/e4gCLH0oTsz+iJtCuCaemu5EkM7soBdsXnisvWAsnd+2iukVypkWpfFZVyEH26BY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=L+uxy9AU; arc=none smtp.client-ip=209.85.215.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="L+uxy9AU" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-c9e607d81fcso3087079a12.2 for ; Fri, 17 Jul 2026 12:54:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1784318045; x=1784922845; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=OErWzxQXSQHPfYViK6AsSVvyH9H9J8o7igncn0U/Abc=; b=L+uxy9AUZC3kEidm+53y3EJTc7PQo7VYY36st+YyDjSGKiA59gU1ARKuXr93lIvTuS 9LoCifD3NuTzEWYiY3B2v7f09wUfe9SLBRbhv0xAeC1DUPKMJ/HIRYweobUd6rx5a6JW i0vk/u+gGJoGWkd7/iaPFH5UPX8+4hezyzMjGfVCuZRzEMLU9HZKJQK/A9a1qBnUmccy ARbITB2d8E4nPPl5432QId6U59i0Op45A3C0thrkNKoRDaua+3ks/LJE2yjXqwe/KDbO l9H9zKCFV9BCMRVSIuZmI4tHrFFXRwqLDh/4PcuHaIxwfUUgniRL3L1bLx2H67gagbTo wGeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784318045; x=1784922845; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=OErWzxQXSQHPfYViK6AsSVvyH9H9J8o7igncn0U/Abc=; b=gTDOn0Q70VYk57J/kGL/RlWobEO1wqdRvEsoaFEpX98LJHvPf8hz0ECjjTWWXDBCai M5MNs6Qf2CoLPFnpUugdM9SEPjWesKWS+H6guGAZ/wtX8+QGkvf6fvSNTyDO/kq9Zq8t y3kQecyg9zMBO703zsWrqtI18tpTJgz93SkYL+s1CG+D//u1922tRxnkKA9rNicegpQc dt7TCssuLjVjMj5hLTlMQC+Ogjya/ahSFtK8X48Mx6zSnJvU4DT6RwWa6DTdm9WG6CMo 3d81webqfPgh5GVl6nCmHPxl+AECLXt4avQ+ILLIPmeuRn8ZMsz9JP1RpQ1rvfnf14x9 uCPQ== X-Forwarded-Encrypted: i=1; AHgh+RpQEDmvGToGOqJrDrTRsOZbgLUzBEQIzYmhJYk23YaIxGUDP2Z0qxqV0CuY9eJ3Sv3/ZYdom7P3N7gwEGc=@vger.kernel.org X-Gm-Message-State: AOJu0YxvatgjXNTnFMmrPWsS0k0tYUtDKcv+RXPL/KwufFhxVv3kUyVp LGJ6Iw7ovWr1re41vNIkZFcJGQ299x0Q7RYcieu029xl07kY5gUsJt+4 X-Gm-Gg: AfdE7cn+osq9iJTC6hqSBmO42xZvaVPUMSAKZ0E+QB9oiNsWcDHlppHNTpcv7Islpvw /FuXsIJux+akgFoqTQw5f924mj38Ux5NZ/WYzS5mgp6frRg5pdykjp2vy8tK350Mw3lpz7ybtVY Qq+aSCYqetEjHd930Vh1TKTgSOWknn5cmvPPWd9tqjArL8TTZP6US0pWzrGfxYogV9lnUZd6ocy uhqQ1S7bVuOL0djpsJGT+onc7CHBLqvuYZoayCZp3ttWFCdPHNbDPe+Bkw3D/M0CAQYDIXScgUZ SbXlpx0POfrSOutSC/sWZmGyG6IjAWFmA0FfFFyvRh/FXLIC8Ncg6q5N5ICsIOYu3FtFPRl0rgk tjXES+7OYO7tHxULyXTRSziutSpBDO1wT61jugnXG8j95574n0lieKkvRS1qoDJJx4vEtEI4hm+ +5QMmsLnU33Biqt5zlVNPPHgRVW4Ja/Y6g9vQf5rRf2R39Hl/B/dCt5ZOtH4iZD8Oa6XgpO1MIr Z6s X-Received: by 2002:a05:6a21:6813:b0:3c0:9c19:b27d with SMTP id adf61e73a8af0-3c3adb1f025mr4919860637.75.1784318045058; Fri, 17 Jul 2026 12:54:05 -0700 (PDT) Received: from ghost.localdomain ([103.170.252.7]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13ce29c2dcdsm7103119c88.1.2026.07.17.12.53.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jul 2026 12:54:04 -0700 (PDT) Received: from ghost.localdomain (ip6-localhost [::1]) by ghost.localdomain (OpenSMTPD) with ESMTP id 7fc67677; Fri, 17 Jul 2026 19:53:56 +0000 (UTC) From: Nikhil Solanke To: linux-usb@vger.kernel.org Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, stern@rowland.harvard.edu, michal.pecio@gmail.com, corbet@lwn.net, skhan@linuxfoundation.org, linux-doc@vger.kernel.org, stable@vger.kernel.org, Nikhil Solanke Subject: [PATCH 0/2] usbcore: Add quirk for 255-byte initial config read Date: Sat, 18 Jul 2026 01:23:34 +0530 Message-ID: <20260717195336.98500-1-nikhilsolanke5@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series adds a quirk for USB devices that fail enumeration when the initial GET_DESCRIPTOR(CONFIGURATION) request uses wLength=9. Patch 1 adds USB_QUIRK_WINDOWS_CONFIG_REQ_SIZE which causes usb_get_configuration() to use wLength=255 for the initial config descriptor request, mirroring long-standing Windows behavior. Patch 2 splits announce_device() to log device identity before enumeration, improving failure diagnosis. Nikhil Solanke (2): usbcore: Add quirk for 255-bytes initial config read USB: hub: Split announce_device() to log device identity before enumeration .../admin-guide/kernel-parameters.txt | 10 +++++ drivers/usb/core/config.c | 39 +++++++++++++++---- drivers/usb/core/hub.c | 16 ++++++-- drivers/usb/core/quirks.c | 4 ++ include/linux/usb/quirks.h | 3 ++ 5 files changed, 61 insertions(+), 11 deletions(-) -- 2.55.0